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HomeMy WebLinkAboutHunter's Ridge Residential Areash C HUNTER'S RIDGE RESIDENTIAL AREAS PRELIMINARY HYDROLOGY STUDIES FOR TRACTS 14274, 14275, 14276, 14277, 14570, 14571, 14572 AND 14573 d h1l � L_J PREPARED BY: J.P. KAPP & ASSOCIATES, INC. 15892 PASADENA AVENUE TUSTIN, CALIFORNIA 92680 (714) 730 -5757 JUNE 1990 June 21, 1990 DISCUSSION Preliminary Hydrology Studies for Phase I and Phase II Tracts in Hunter's Ridge were prepared in this office and were based on available information about soils and land use types. Computer program package by AES with reference to 1986 San Bernardino County Hydrology Criterion, prepared specifically for J.P. Kapp & Associates, Inc. was used. **************************************** * * * * * * * * * * * * * * * * * ** * * * * * * * * * ** * * ** RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE (Reference: 1986 SAN BERNARDINO CO. HYDROLOGY CRITERION) Copyright 1983,86,87 Advanced Engineering Software (aes) Ver. 4.1C Release Date: 5/11/87 Serial # I00937 Especially prepared for: J.P. KAPP & ASSOCIATES, INC. * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * TRACT NO 14274 * HYDROLOGY STUDY * * 25 YEAR STORM * ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FILE NAME: HUNTERS.3 TIME /DATE OF STUDY: 15:47 5/ 2/1990 USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: -- *TIME -OF- CONCENTRATION MODEL*- - USER SPECIFIED STORM EVENT(YEAR) = 25.00 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = .95 *USER- DEFINED LOGARITHMIC INTERPOLATION USED FOR RAINFALL* 10 -YEAR STORM 60- MINUTE INTENSITY(INCH /HOUR) = 1.060 100 -YEAR STORM 60- MINUTE INTENSITY(INCH /HOUR) = 1.590 COMPUTED RAINFALL INTENSITY DATA: STORM EVENT = 25.00 1 -HOUR INTENSITY(INCH /HOUR) = 1.2461 SLOPE OF INTENSITY DURATION CURVE = .7000 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 1.00 TO NODE 2.00 IS CODE = 2 >> » > RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 3 -4 DWELLINGS /ACRE TC = K *[(LENGTH ** 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 1680.00 DOWNSTREAM ELEVATION = 1648.00 ELEVATION DIFFERENCE = 32.00 TC = .412 *[( 1000.00 ** 3.00)/( 32.00)] ** .20 = 12.998 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.635 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) = .5820 SUBAREA RUNOFF(CFS) = 19.24 TOTAL AREA(ACRES) = 7.00 PEAK FLOW RATE(CFS) = 19.24 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2.00 TO NODE 3.00 IS CODE = 6 >> >> >COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<<<<< UPSTREAM ELEVATION = 1648.00 DOWNSTREAM ELEVATION = 1638.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 12.00 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET CROSSFALL(DECIMAL) _ .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 2 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 35.19 ' STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .66 HALFSTREET FLOODWIDTH(FEET) = 18.87 AVERAGE FLOW VELOCITY(FEET /SEC.) = 4.04 1 PRODUCT OF DEPTH &VELOCITY = 2.65 STREETFLOW TRAVELTIME(MIN) = 3.30 TC(MIN) = 16.30 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.103 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .5820 ' SUBAREA AREA(ACRES) = 14.00 SUBAREA RUNOFF(CFS) = 31.77 EFFECTIVE AREA(ACRES) = 21.00 AVERAGED Fm(INCH /HR) _ .582 TOTAL AREA(ACRES) = 21.00 PEAK FLOW RATE(CFS) = 47.65 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .71 HALFSTREET FLOODWIDTH(FEET) = 20.00 FLOW VELOCITY(FEET /SEC.) = 4.43 DEPTH *VELOCITY = 3.14 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3.00 TO NODE 4.00 IS CODE = 6 > >> >COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA < << << UPSTREAM ELEVATION =- 1200.00 DDOURBSTREAM ELEVATION 1608.00 8. 1608.00 STREET LENGTH(FEET) STREET HALFWIDTH(FEET) = 20.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 12.00 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET CROSSFALL(DECIMAL) _ .040 - SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF 2 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 72.08 ** *STREET FLOWING FULL * ** STREETFLOW MODEL RESULTS: NOTE: STREETFLOW EXCEEDS TOP OF CURB. THE FOLLOWING STREETFLOW RESULTS ARE BASED ON THE ASSUMPTION THAT NEGLIBLE FLOW OCCURS OUTSIDE OF THE STREET CHANNEL. THAT IS, ALL FLOW ALONG THE PARKWAY, ETC., IS NEGLECTED. STREET FLOWDEPTH(FEET) _ .71 HALFSTREET FLOODWIDTH(FEET) = 20.00 AVERAGE FLOW VELOCITY(FEET /SEC.) = 6.70 PRODUCT OF DEPTH &VELOCITY = 4.74 STREETFLOW TRAVELTIME(MIN) = 2.98 TC(MIN) = 19.28 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.759 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .5820 SUBAREA AREA(ACRES) = 25.00 SUBAREA RUNOFF(CFS) = 48.97 EFFECTIVE AREA(ACRES) = 46.00 AVERAGED Fm(INCH /HR) _ •582 TOTAL AREA(ACRES) = 46.00 PEAK FLOW RATE(CFS) = 90.11 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .75 HALFSTREET FLOODWIDTH(FEET) = 20.00 FLOW PROCESS FROM NODE 4.00 TO NODE 5.00 IS CODE = 6 ------ -------- ----- ----- --------- ---- ---- ---- >>>>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<<<<< UPSTREAM ELEVATION = 1608.00 DOWNSTREAM ELEVATION = 1575.00 STREET LENGTH(FEET) = 1600.00 CURB HEIGTH(INCHES) = 8. STREET HALFWIDTH(FEET) = 20.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 12.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 2 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 105.20 ** *STREET FLOWING FULL * ** STREETFLOW MODEL RESULTS: NOTE: STREETFLOW EXCEEDS TOP OF CURB. THE FOLLOWING STREETFLOW RESULTS ARE BASED ON THE ASSUMPTION THAT NEGLIBLE FLOW OCCURS OUTSIDE OF THE STREET CHANNEL. THAT IS, ALL FLOW ALONG THE PARKWAY, ETC., IS NEGLECTED. STREET FLOWDEPTH(FEET) = .81 HALFSTREET FLOODWIDTH(FEET) = 20.00 AVERAGE FLOW VELOCITY(FEET /SEC.) = 7.18 PRODUCT OF DEPTH &VELOCITY = 5.78 STREETFLOW TRAVELTIME(MIN) = 3.72 TC(MIN) = 22.99 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.438 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .5820 SUBAREA AREA(ACRES) = 18.00 SUBAREA RUNOFF(CFS) = 30.07 EFFECTIVE AREA(ACRES) = 64.00 AVERAGED Fm(INCH /HR) _ •582 TOTAL AREA(ACRES) = 64.00 PEAK FLOW RATE(CFS) = 106.93 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .81 HALFSTREET FLOODWIDTH(FEET) = 20.00 FLOW VELOCITY(FEET /SEC.) = 7.30 DEPTH *VELOCITY = 5.87 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** - - FLOW PROCESS FROM NODE 5.00 TO NODE 6.00 IS CODE = 3 > > >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA < < <<< - - > > >>> USING - COMPUTER_ ESTIMATED - PIPESIZE -(NON _PRESSURE - FLOW)« « <----- - - - - -- DEPTH OF FLOW IN 42.0 INCH PIPE IS 30.1 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 14.5 UPSTREAM NODE ELEVATION = 1575.00 DOWNSTREAM NODE ELEVATION = 1559.00 FLOWLENGTH(FEET) = 1000.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 42.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 106.93 TRAVEL TIME(MIN.) = 1.15 TC(MIN.) = 24.14 ** FLOW PROCESS FROM NODE 6.00 TO NODE 6.00 IS CODE = 1 > > > > >DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE <<< << CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: t TIME OF CONCENTRATION(MINUTES) = 24.14 TOTAL STREAM AREA(ACRES) = 64.00 PEAK FLOW RATE AT CONFLUENCE = 106.93 - - FLOW PROCESS FROM NODE 7.00 TO NODE 8.00 IS CODE = 2 ---- -------- ----- ----- --------- ---- ---- --------- ---- ---- ------------------ >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE TC = K *[(LENGTH ** 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 1593.00 DOWNSTREAM ELEVATION = 1572.00 ELEVATION DIFFERENCE = 21.00 TC = .389 *[( 1000.00 ** 3.00)/( 21.00)] ** .20 = 13.351 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.568 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA RUNOFF(CFS) = 6.94 TOTAL AREA(ACRES) = 2.50 PEAK FLOW RATE(CFS) = 6.94 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 8.00 TO NODE - - - -- 6_00 - IS - CODE = 6 - - - - -- >> >>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA <<< << --------------- - - - -- UPSTREAM ELEVATION = 1572.00 DOWNSTREAM ELEVATION = 1559.00 STREET LENGTH(FEET) = 1000.00 CURB HEIGTH(INCHES) = 8. STREET HALFWIDTH(FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET CROSSFALL(DECIMAL) _ .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 10.90 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .57 HALFSTREET FLOODWIDTH(FEET) = 14.56 AVERAGE FLOW VELOCITY(FEET /SEC.) = 3.75 PRODUCT OF DEPTH &VELOCITY = 2.13 STREETFLOW TRAVELTIME(MIN) = 4.45 TC(MIN) = 17.80 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.917 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 3.60 SUBAREA RUNOFF(CFS) = 7.88 EFFECTIVE AREA(ACRES) = 6.10 AVERAGED Fm(INCH /HR) = .485 TOTAL AREA(ACRES) = 6.10 PEAK FLOW RATE(CFS) = 13.35 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .61 HALFSTREET FLOODWIDTH(FEET) = 16.44 FLOW VELOCITY(FEET /SEC.) = 3.82 DEPTH *VELOCITY = 2.32 FLOW PROCESS FROM NODE 6.00 TO NODE 6.00 IS CODE = 1 --------------------------------------------- - ->> >>> DESIGNATE - INDEPENDENT - STREAM - FOR - CONFLUENCE <<<< <--------------- - - - - -- RAINFALL INTENS =TY (INCH. /HOUR) = 2.92 EFFECTIVE STREAM AREA(ACRES) = 6.10 1 TOTAL STREAM AREA(ACRES) = 6.10 PEAK FLOW RATE(_FS) AT CONFLUENCE = 13.35 FLOW PROCESS FROM NODE 9.00 TO NODE 10.00 IS CODE = 2 ' > > > > >RATIONAL METHOD INITIAL - SUBAREA ANALYSIS<<<<<------------------------ DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE ' TC = K *[(LENGTHX* 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 1591.00 DOWNSTREAM ELEVATION = 1570.00 ELEVATION DIFFERENCE = 21.00 TC = .389 *[( 1000.00 ** 3 21.00)] ** .20 = 13.351 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.568 SOIL CLASSIFICATION IS A RESIDENTIAL DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA RUNOFF(CFS) = 7.21 TOTAL AREA(ACRES) = 2.60 PEAK FLOW RATE(CFS) = 7.21 FLOW PROCESS FROM NODE 10.00 TO NODE 6.00 IS CODE = 6 i >>> > > COMPUTE S TREETFLOW - TRAVELTIME - THRU - SUBAREA <<< << -- -------------- - - - - -- UPSTREAM ELEVATION = 1570.00 DOWNSTREAM ELEVATION = 1559.00 STREET LENGTH(FEET) = 770.00 CURB HEIGTH(INCHES) = 8. STREET HALFWIDTH(FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 9.65 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .54 HALFSTREET FLOODWIDTH(FEET) = 13.31 AVERAGE FLOW VELOCITY(FEET /SEC.) = 3.77 PRODUCT OF DEPTH &VELOCITY = 2.05 STREETFLOW TRAVELTIME(MIN) = 3.41 TC(MIN) = 16.76 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.043 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 2.10 SUBAREA RUNOFF(CFS) = 4.83 EFFECTIVE AREA(ACRES) = 4.70 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 4.70 PEAK FLOW RATE(CFS) = 10.82 t END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .56 HALFSTREET FLOODWIDTH(FEET) = 13.94 FLOW VELOCITY(FEET /SEC.) = 3.96 DEPTH *VELOCITY = 2.21 FLOW PROCESS FROM NODE 6.00 TO NODE 6.00 - - IS CODE =---1------------ ------------------------------------------ -------- -- - - - - -- CONFLUENCE 'VALUES USED FOR INDEPENDENT STREAM 3 ARE: TIME OF CONCENTRATION(MINUTES) = 16.76 RAINFALL INTENSITY (INCH. /HOUR) = 3.04 EFFECTIVE STREAM AREA(ACRES) = 4.70 TOTAL STREAM AREA(ACRES) = 4.70 PEAK FLOW RATE(CFS) AT CONFLUENCE = 10.82 CONFLUENCE INFORMATION: STREAM PEAK FLOW TIME INTENSITY FM EFFECTIVE NUMBER RATE(CFS) (MIN.) (INCH /HOUR) (IN /HR) AREA(ACRES) ---- 1 - - - - -- 106.93 - - - -- 24.14-- - - - - -2 357 - - - .58 64.00 2 13.35 17.80 2.917 .49 6.10 3 10.82 16.76 3.043 .49 4.70 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 3 STREAMS. SUMMARY RESULTS: STREAM CONFLUENCE EFFECTIVE NUMBER Q(CFS) AREA(ACRES) ---------------------- - - - -1 125.12 74.80 2 127.37 57.99 3 126.96 54.86 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 127.37 TIME(MINUTES) = 17.801 EFFECTIVE AREA(ACRES) = 57.99 TOTAL AREA(ACRES) = 74.80 FLOW PROCESS FROM NODE 6.00 TO NODE 6.00 IS CODE = 8 ------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW <<<<< 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.917 SOIL CLASSIFICATION IS 'A' RESIDENTIAL-> F .4850 m(IN�HOiR) _ EFFECTIVE AREA(ACRES) = 64.39 AVERAGED Fm(INCH /HR) _ .556 TOTAL AREA(ACRES) = 81.20 PEAK FLOW RATE(CFS) = 136.81 TC(MIN) = 17.80 FLOW PROCESS FROM NODE 6.00 TO NODE 6.00 IS CODE = 8 : -------- ---- --------- __ ----------------------- ------------ --> » » ADDITION -OF- SUBAREA -TO- MAINLINE -- PEAK --FLOW « < « ----------------------- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.917 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 1.70 SUBAREA RUNOFF(CFS) = 3.72 EFFECTIVE AREA(ACRES) = 66.09 AVERAGED F /HR) _ .554 TOTAL AREA(ACRES) = 82.90 PEAK FLOW RATE(CFS) = 140.53 TC(MIN) = 17.80 >> > > > COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< >> >>> USING COMPUTER- ESTIMATED PIPESIZE (NON- PRESSURE FLCW)< << << DEPTH OF FLOW Il 45.0 INCH PIPE IS 31.7 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 16.9 ' UPSTREAM NODE ELEVATION = 1559.00 DOWNSTREAM NODE ELEVATION = 1558.20 FLOWLENGTH(FEE7) = 40.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 45.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 140.53 TRAVEL TIME(MIN.) _ .04 TC(MIN.) = 17.84 FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS CODE = 1 --------------------------------------------------------- >> > > >DESIGNATE INDEPENDENT - STREAM - FOR CONFLUENCE < << << --------------- - - -- CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MINUTES) = 17.84 RAINFALL INTENSITY (INCH. /HOUR) = 2.91 EFFECTIVE STREAM AREA(ACRES) = 66.09 TOTAL STREAM AREA(ACRES) = 82.90 PEAK FLOW RATE(CFS) AT CONFLUENCE = 140.53 FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 2 ------------------------------------------------------ -- >>>>>RATIONAL - METHOD - INITIAL - SUBAREA - ANALYSIS <<<< < ------------------ - - - - -- NATURAL AVERAGE COVER TC = K *[(LENGTH ** 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 850.00 UPSTREAM ELEVATION = 1603.00 DOWNSTREAM ELEVATION = 1585.00 ELEVATION DIFFERENCE = 18.00 TC = .706 *[( 850.00 ** 3.00)/( 18.00)] ** .20 = 22.667 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.463 SOIL CLASSIFICATION IS "A" NATURAL AVERAGE COVER "GRASS" SUBAREA LOSS RATE, Fm(INCH /HR) _ .8200 SUBAREA RUNOFF(CFS) = 13.31 TOTAL AREA(ACRES) = 9.00 PEAK FLOW RATE(CFS) = 13.31 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 6 -------------------------------------------------- -- >> >>>COMPUTE-STREETFLOW- TRAVELTIME -THRU- SUBAREA << < <<---------------- - - - - -- UPSTREAM ELEVATION = 1585.00 DOWNSTREAM ELEVATION = 1563.00 STREET LENGTH(FEET) = 1000.00 CURB HEIGTH(INCHES) = 8. STREET HALFWIDTH(FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 17.56 STREETFLOW MODEL ^ RESULTS: STREET FLOWDEPTH(FEET) _ .61 hINUUU i yr Utt' 1 hd(VtLUk l 1 r STREETFLOW TRAVELTIME(MIN) = 3.31 TC(MIN) = 25.98 ' 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.239 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 5.40 SUBAREA RUNOFF(CFS) = 8.52 EFFECTIVE AREA(ACRES) = 14.40 AVERAGED Fm(INCH /HR) _ .694 TOTAL AREA(ACRES) = 14.40 PEAK FLOW RATE(CFS) = 20.01 END OF SUBAREA STREETFLOW HYDRAULICS: ' DEPTH(FEET) _ .63 HALFSTREET FLOODWIDTH(FEET) = 17.69 FLOW VELOCITY(FEET /SEC.) = 5.11 DEPTH *VELOCITY = 3.23 - - FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 8 M -------------------------------------------------------- - - - - -- - - - -- - ->> >>>ADDITION SUBAREA - TO - MAINLINE - PEAK FLOW<<<< < - - - - -- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.239 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 4.60 SUBAREA RUNOFF(CFS) = 7.26 EFFECTIVE AREA(ACRES) = 19.00 AVERAGED Fm(INCH /HR) _ .644 TOTAL AREA(ACRES) = 19.00 PEAK FLOW RATE(CFS) = 27.27 TC(MIN) = 25.98 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** - - FLOW PROCESS FROM NODE 14.00 TO NODE 11.00 IS CODE = 3 >>> >> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< >> » >USING COMPUTER- ESTIMATED PIPESIZE (NON- PRESSURE FLOW) <<< << DEPTH OF FLOW IN 24.0 INCH PIPE IS 18.6 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 10.5 UPSTREAM NODE ELEVATION = 1563.00 DOWNSTREAM NODE ELEVATION = 1558.20 FLOWLENGTH(FEET) = 280.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 27.27 TRAVEL TIME(MIN.) _ .45 TC(MIN.) = 26.43 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** -- FLOW - PROCESS - FROM - NODE - - -- 11_00 - TO - NODE - - -- 11_00 - IS - CODE _ --- 1 ------ - - - - -- >>> >> DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES < < CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MINUTES) = 26.43 RAINFALL INTENSITY (INCH. /HOUR) = 2.21 EFFECTIVE STREAM AREA(ACRES) = 19.00 TOTAL STREAM AREA(ACRES) = 19.00 PEAK FLOW RATE(CFS) AT CONFLUENCE = 27.27 CONFLUENCE INFORMATION: STREAM PEAK FLOW TIME INTENSITY FM EFFECTIVE -- NUMBER RATE(CFS) (MIN.) (INCH /HOUR) (IN /HR) AREA(ACRES) ' RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. SUMMARY RESULTS: STREAM CONFLUENCE EFFECTIVE t NUMBER Q(CFS) AREA(ACRES) -- ------------------------------------- 1 167.16 78.91 2 126.07 85.09 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 167.16 TIME(MINUTES) = 17.840 ' EFFECTIVE AREA(ACRES) = 78.91 TOTAL AREA(ACRES) = 101.90 FLOW PROCESS FROM NODE 11.00 TO NODE 15.00 IS CODE = 3 ---------------------------------------------------------------------------- >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< >> >>>USING COMPUTER- ESTIMATED PIPESIZE (NON- PRESSURE FLOW)<<< << DEPTH OF FLOW IN 48.0 INCH PIPE IS 38.3 INCHES 1 PIPEFLOW VELOCITY(FEET /SEC.) = 15.6 UPSTREAM NODE ELEVATION = 1558.20 DOWNSTREAM NODE ELEVATION = 1555.95 FLOWLENGTH(FEET) = 150.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 48.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 167.16 TRAVEL TIME(MIN.) _ --- - _16 -- TC(MIN.) = 18.00 END OF STUDY SUMMARY: TOTAL AREA(ACRES) = 101.90 EFFECTIVE AREA(ACRES) = 78.91 PEAK FLOW RATE(CFS) = 167.16 END OF RATIONAL METHOD ANALYSIS i J J 0 I RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE (Reference: 1986 SAN BERNARDINO CO. HYDROLOGY CRITERION) Copyright 1983,86,87 Advanced Engineering Software (aes) Ver. 4.1C Release Date: 5/11/87 Serial # I00937 Especially prepared for: J.P. KAPP & ASSOCIATES, INC. * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * TRACT NO. 14275 1 * HYDROLOGY STUDY * 25 YEAR STORM ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FILE NAME: HUNTERS.2 TIME /DATE OF STUDY: 11:16 5/ 3/1990 ---------------------------------------------------------------------------- -- USER - SPECIFIED - HYDROLOGY AND - HYDRAULIC - MODEL - INFORMATION ----------------- -- *TIME -OF- CONCENTRATION MODEL*- - USER SPECIFIED STORM EVENT(YEAR) = 25.00 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE _ .95 *USER - DEFINED LOGARITHMIC INTERPOLATION USED FOR RAINFALL* 10 -YEAR STORM 60- MINUTE INTENSITY(INCH /HOUR) = 1.060 100 -YEAR STORM 60- MINUTE INTENSITY(INCH /HOUR) = 1.590 COMPUTED RAINFALL INTENSITY DATA: STORM EVENT = 25.00 1 -HOUR INTENSITY(INCH /HOUR) = 1.2461 SLOPE OF INTENSITY DURATION CURVE _ .7000 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.10 TO NODE 6.20 IS CODE = 2 ---------------------------------------------------------------------------- >> >>> RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<< << ---------------------------------------------------------------------------- NATURAL AVERAGE COVER TC = K *[(LENGTH ** 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 410.00 UPSTREAM ELEVATION = 1585.00 ' DOWNSTREAM ELEVATION = 1575.00 - ELEVATION DIFFERENCE = 10.00 TC = .706 *[( 410.00 ** 3.00)/( 10.00)] ** .20 - 16.462 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.081 SOIL CLASSIFICATION IS "A" NATURAL AVERAGE COVER "GRASS" SUBAREA LOSS RATE, Fm(INCH /HR) _ .8200 SUBAREA RUNOFF(CFS) = 19.54 TOTAL AREA(ACRES) = 9.60 PEAK FLOW RATE(CFS) = 19.54 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** -- FLOW - PROCESS FROM NODE 6.20 TO NODE 7.00 IS CODE = 6 --------------------------------------------------------------------- >> >>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA < < < << UPSTREAM ELEVATION = 1575.00 DOWNSTREAM ELEVATION = 1565.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET 'ROSSFALL(DECIMAL) = 020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 22.92 * * *STREETFLOW SPLITS OVER STREET - CROWN * ** FULL DEPTH(FEET) = .64 FLOODWIDTH(FEET) = 18.00 FULL HALF - STREET VELOCITY(FEET /SEC.) = 5.31 SPLIT DEPTH(FEET) = .28 SPLIT FLOODWIDTH(FEET) = 4.06 SPLIT VELOCITY(FEET /SEC.) = 3.16 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .64 HALFSTREET FLOODWIDTH(FEET) = 18.00 AVERAGE FLOW VELOCITY(FEET /SEC.) = 5.31 PRODUCT OF DEPTH &VELOCITY = 3.39 STREETFLOW TRAVELTIME(MIN) = 1.41 TC(MIN) = 17.87 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.909 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 3.10 SUBAREA RUNOFF(CFS) = 6.76 EFFECTIVE AREA(ACRES) = 12.70 ' AVERAGED Fm(INCH /HR) _ .738 TOTAL AREA(ACRES) = 12.70 PEAK FLOW RATE(CFS) = 24.81 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .64 HALFSTREET FLOODWIDTH(FEET) = 18.00 FLOW VELOCITY(FEET /SEC.) = 5.31 DEPTH *VELOCITY = 3.39 FLOW PROCESS FROM NODE 8.00 TO NODE 7.00 IS CODE = 8 ---------------------------------------------------------------------------- - - > > >>> ADDITION-OF_SUBAREA-TO- MAINLINE - PEAK- FLOW< < <<< ----------------- - - - - -- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.909 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 1.90 SUBAREA RUNOFF(CFS) = 4.14 EFFECTIVE AREA(ACRES) = 14.60 AVERAGED Fm(INCH /HR) _ .705 TOTAL AREA(ACRES) = 14.60 PEAK FLOW RATE(CFS) = 28.95 TC(MIN) = 17.87 FLOW PROCESS FROM NODE 7.00 TO NODE 5.10 IS CODE = 3 ---------------------------------------------------------------------------- >> >>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< - ->> >>> USING - COMPUTER- ESTIMATED - PIPESIZE - (NON - PRESSURE - FLOW) <<<<< ----- - - - - -- DEPTH OF FLOW IN 27.0 INCH PIPE IS 17.5 INCHES PIPEFLOW VELOCITY(FEET /SEC) = 10.6 UPSTREAM NODE ELEVATION = 1565.00 DOWNSTREAM NODE ELEVATION - 1553.30 FLOWLENGTH(FEET) = 720.00 MANNINGS N = .013 ' ESTIMATED PIPE DIAMETER(INCH) = 27.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 28.95 ® TRAVEL TIME(MIN.) = 1.13 TC(MIN.) = 19.00 - - >>>>> DESIGNATE - = INDEPENDENT STREAM - FOR - CONFLUENCE << <<< ------------ - - - - -- CONFLUENCE VALU-ES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MINUTES) = 19.00 RAINFALL INTENSITY (INCH. /HOUR) = 2.79 EFFECTIVE STREAM AREA(ACRES) = 14.60 TOTAL STREAM AREA(ACRES) = 14.60 t PEAK FLOW RATE(CFS) AT CONFLUENCE = 28.95 - - FLOW - PROCESS FROM NODE 1.00 TO NODE 2.00 IS CODE = 2 -------------------- >>> >> RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE TC = K *[(LENGTH ** 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 750.00 UPSTREAM ELEVATION = 1573.00 DOWNSTREAM ELEVATION = 1560.00 - ELEVATION DIFFERENCE = 13.00 TC = .389 *[( 750.00 ** 3.00)/( 13.00)] ** .20 12.365 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.764 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(I'NCH /HR) _ .4850 SUBAREA RUNOFF(CFS) = 8.26 ' TOTAL AREA(ACRES) = 2.80 PEAK FLOW RATE(CFS) = 8.26 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** -- FLOW - PROCESS FROM NODE 2.00 TO NODE 3.00 IS CODE = 6 ------- ----- ----- --------- ---- ---- --------- ---- ---- ------------------ >>>> >COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA < < <<< UPSTREAM ELEVATION = 1560.00 DOWNSTREAM ELEVATION = 1555.00 STREET LENGTH(FEET) = 450.00 CURB HEIGTH(INCHES) = 8. STREET HALFWIDTH(FEET) = 18.00 - DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK 10.00 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 ' OUTSIDE STREET CROSSFALL(DECIMAL) _ .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 n Fi i J * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) _ STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .57 HALFSTREET FLOODWIDTH(FEET) = 14.56 AVERAGE FLOW VELOCITY(FEET /SEC.) = 3.46 PRODUCT OF DEPTH &VELOCITY = 1.97 STREETFLOW TRAVELTIME(MIN) = 2.16 TC(MIN) = 14.53 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.363 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, SUBAREA AREA(ACRES) = 1.40 SUBAREA RUNOFF(CFS) EFFECTIVE AREA(ACRES) = 4.20 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 4.20 PEAK FLOW RATE(CFS) _ END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .58 HALFSTREET FLOODWIDTH(FEET) _ FLOW VELOCITY(FEET /SEC.) = 3.51 DEPTH *VELOCITY = 10.08 Fm(INCH /HR)' _ 3.63 '0.88 15.19 2. 4 .4850 L l J 0 H f� L FLOW PROCESS F °CM NODE 3.00 TO NODE 3.00 IS CODE = 8 >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW <<<<< 25 YEAR RAIL +FALL INTENSITY(INCH /HOUR) = 3.363 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 1.80 SUBAREA RUNOFF(CFS) = 4.66 EFFECTIVE AREA(ACRES) = 6.00 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 6.00 PEAK FLOW RATE(CFS) = 15.54 TC(MIN) = 14.53 FLOW PROCESS FROM NODE 3.00 TO NODE 5.10 IS CODE = 3 > >>>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< >> >>>USING COMPUTER - ESTIMATED PIPESIZE (NON- PRESSURE FLOW)<<<<< DEPTH OF FLOW IN 24.0 INCH PIPE IS 15.7 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 7.1 UPSTREAM NODE ELEVATION = 1555.00 DOWNSTREAM NODE ELEVATION = 1553.30 FLOWLENGTH(FEET) = 200.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 15.54 TRAVEL TIME(MIN.) _ .47 TC(MIN.) = 15.00 FLOW PROCESS FROM NODE 5.10 TO NODE 5.10 IS CODE = 1 > > >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<< >>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< --------------- -- CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MINUTES) = 15.00 RAINFALL INTENSITY (INCH. /HOUR) = 3.29 EFFECTIVE STREAM AREA(ACRES) = 6.00 TOTAL STREAM AREA(ACRES) = 6.00 PEAK FLOW RATE(CFS) AT CONFLUENCE = 15.54 CONFLUENCE INFORMATION: STREAM PEAK FLOW TIME INTENSITY FM EFFECTIVE NUMBER RATE(CFS) (MIN.) (INCH /HOUR) (IN /HR) AREA(ACRES) ' ---- 1 --- - - - - 28 95 ----- 19. 00 ------- 2.787 ----- .71 --- - - - -14 60 - -- 2 15.54 15.00 3.289 .48 6.00 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. SUMMARY RESULTS: STREAM CONFLUENCE EFFECTIVE NUMBER Q(CFS) AREA(ACRES) --------------------------------------------- 1 41.71 20.60 2 43.90 17.52 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 43.90 TIME(MINUTES) = 14.998 EFFECTIVE AREA(ACRES) = 17.52 TOTAL AREA(ACRES) = 20.60 FLOW PROCESS FF4 NODE 5.10 TO NODE 5.00 IS CODE = 3 ------------------------------------------------------------ >> > > >COMPUTE - PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< > > > > >USING COMPUTER- ESTIMATED PIPESIZE (NON- PRESSURE FLOW)<< < << DEPTH OF FLOW IN 30.0 INCH PIPE IS 21.5 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 11.7 UPSTREAM NODE ELEVATION = 1553.30 DOWNSTREAM NODE ELEVATION = 1552.00 FLOWLENGTH(FEET) = 80.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 30.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 43.90 TRAVEL TIME(MIN.) _ .11 TC(MIN.) = 15.11 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 7.00 TO NODE 5.00 IS CODE = 8 -- >>>>>ADDITION - OF - SUBAREA - TO - MAINLINE - PEAK - FLOW < <<< < ----------------- - - - - -- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.271 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 2.20 SUBAREA RUNOFF(CFS) = 5.52 EFFECTIVE AREA(ACRES) = 19.72 AVERAGED Fm(INCH /HR) _ .614 TOTAL AREA(ACRES) = 22.80 PEAK FLOW RATE(CFS) = 47.17 ' TC(MIN) FLOW PROCESS FROM NODE 5.00 TO NODE 5.00 IS CODE = 1 ---------------------------------------------------------------------------- >> > > >DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<< CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MINUTES) = 15.11 RAINFALL INTENSITY (INCH. /HOUR) = 3.27 EFFECTIVE STREAM AREA(ACRES) = 19.72 TOTAL STREAM AREA(ACRES) = 22.80 PEAK FLOW RATE(CFS) AT CONFLUENCE = 47.17 - - FLOW - PROCESS FROM NODE 9.10 TO NODE 9.00 IS CODE = 2 --------------------------------------------------------------------- > >>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS < << << ' DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE ' TC = K *[(LENGTH=* 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 750.00 UPSTREAM ELEVATION = 1573.00 DOWNSTREAM ELEVATION = 1560.00 ELEVATION DIFFERENCE = 13.00 TC = .389 *[( 750.00 ** 3.00)/( 13.00)] ** .20 = 12.365 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.764 SOIL CLASSIFICATION IS "A'' RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA RUNOFF(CFS) = 9.44 TOTAL AREA(ACRES) = 3.20 PEAK FLOW RATE(CFS) = 9.44 FLOW PROCESS FROM NODE 9.00 TO NODE 5.00 IS CODE = 6 >>>>> COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<<<<< ------------------------ UPSTREAM ELEVATION = 1560.00 DOWNSTREAM ELEVATION = 1552.00 STREET LENGTH(FEET) = 530.00 CURB HEIGTH(INCHES) = 8. STREET HALFWIDTH(FEET) = 18.00 ' DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET CROSSFALL(DECIMAL) _ .040 ' SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 13.48 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .59 HALFSTREET FLOODWIDTH(FEET) = 15.81 AVERAGE FLOW VELOCITY(FEET /SEC.) = 4.10 PRODUCT OF DEPTH &VELOCITY = 2.44 STREETFLOW TRAVELTIME(MIN) = 2.16 TC(MIN) = 14.52 ' 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.364 SOIL CLASSIFICATION IS 'A' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 ' SUBAREA AREA(ACRES) = 3.10 SUBAREA RUNOFF(CFS) = 8.03 EFFECTIVE AREA(ACRES) = 6.30 AVERAGED Fm(INCH /HR) _ .485 ' TOTAL AREA(ACRES) = 6.30 PEAK FLOW RATE(CFS) = 16.32 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .62 HALFSTREET FLOODWIDTH(FEET) = 17.06 ' FLOW VELOCITY(FEET /SEC.) = 4.41 DEPTH *VELOCITY = 2.73 ' - - FLOW PROCESS FROM NODE 5.00 TO NODE 5.00 IS CODE = 1 ---------------------------------------------------------------------- > > >>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<< ' >>>>> AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES <<<<< CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MINUTES) = 14.52 RAINFALL INTENSITY (INCH. /HOUR) = 3.36 EFFECTIVE STREAM AREA(ACRES) = 6.30 TOTAL STREAM AREA(ACRES) = 6.30 ' PEAK FLOW RATE(CFS) AT CONFLUENCE = 16.32 CONFLUENCE INFORMATION: ' STREAM PEAK FLOW TIME INTENSITY FM EFFECTIVE NUMBER RATE(CFS) (MIN.) (INCH /HOUR) (IN/HR) AREA(ACRES) -------------------------------------------------------------- 1 47.17 15.11 3.271 .61 19.72 ' 2 16.32 14.52 3.364 .48 6.30 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO ' CONFLUENCE FORMULA USED FOR 2 STREAMS. SUMMARY RESULTS: STREAM CONFLUENCE EFFECTIVE ' -- NUMBER Q(CFS) AREA(ACRES) 1 62.97 26.02 2 63.23 25.25 ' COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 63.23 TIME(MINUTES) = 14.521 FLOW PROCESS FROM NODE 11.00 TO NODE 12.00 IS CODE = 2 -- >>>>>RATIONAL - METHOD - INITIAL - SUBAREA - ANALYSIS <<<<<------------------ - - - - -- ------------------ DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE TC = K *[(LENGTH** 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 1579.00 DOWNSTREAM ELEVATION = 1557.00 ELEVATION DIFFERENCE = 22.00 TC = .389 *[( 1000.00 ** 3.00)/( 22.00)] ** .20 = 13.227 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.591 SOIL CLASSIFICATION IS 'A' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA RUNOFF(CFS) = 5.87 TOTAL AREA(ACRES) = 2.10 PEAK FLOW RATE(CFS) = 5.87 FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 6 - ->>> >> COMPUTE TRAVELTIME - THRU - SUBAREA < < << < ---------------- - - - - -- UPSTREAM ELEVATION = 1557.00 DOWNSTREAM ELEVATION = 1542.00 ' STREET LENGTH(FEET) = 750.00 CURB HEIGTH(INCHES) = 8. STREET HALFWIDTH(FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 9.33 ' STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .51 HALFSTREET FLOODWIDTH(FEET) = 11.44 ' AVERAGE FLOW VELOCITY(FEET /SEC.) = 4.45 PRODUCT OF DEPTH &VELOCITY = 2.25 STREETFLOW TRAVELTIME(MIN) = 2.81 TC(MIN) = 16.04 ' 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.138 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 ' SUBAREA AREA(ACRES) = 2.90 SUBAREA RUNOFF(CFS) = 6.92 EFFECTIVE AREA(ACRES) = 5.00 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 5.00 PEAK FLOW RATE(CFS) = 11.94 ' END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .54 HALFSTREET FLOODWIDTH(FEET) = 13.31 FLOW VELOCITY(FEET /SEC.) = 4.66 DEPTH *VELOCITY = 2.54 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 8 ' ---- ----- --------- ---- ---- --------- ---- ---- ------------------ >>> > > ADDITION OF SUBAREA TO MAINLINE PEAK FLOW <<<<< ' 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.138 SOIL CLASSIFICATION IS "A" EFFECTIVE AREA(lACRES) = 6.00 ' AVERAGED Fm(I' +CH /HR) _ .485 TOTAL AREA(ACRES) = 6.00 PEAK FLOW RATE(CFS) = 14.33 TC(MIN) = 16.04 ' FLOW PROCESS FROM - NODE - - -- 13_00 - TO - NODE - - -- 17_ - IS - CODE = 3 >> > >> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< >> > > >USING COMPUTER- ESTIMATED PIPESIZE (NON- PRESSURE FLOW)<<<<< ' DEPTH OF FLOW IN 21.0 INCH PIPE IS 15.3 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 7.6 UPSTREAM NODE ELEVATION = 1542.00 DOWNSTREAM NODE ELEVATION = 1541.00 FLOWLENGTH(FEET) = 90.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 21.00 NUMBER OF PIPES- PIPEFLOW THRU SUBAREA(CFS) = 14.33 TRAVEL TIME(MIN.) _ .20 TC(MIN.) = 16.23 FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 8 >> » >ADDITION OF SUBAREA TO MAINLINE PEAK FLOW <<< << ----------------- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.111 ' SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(IjdCH /HR) _ .4850 SUBAREA AREA(ACRES) = 1.70 SUBAREA RUNOFF(CFS) = 4.02 ' EFFECTIVE AREA(ACRES) = 7.70 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 7.70 ' PEAK FLOW RATE(CFS) = 18.20 TC(MIN) = 16.23 FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 1 ---------------------------------------------------------------------------- ' - ->>>>> DESIGNATE INDEPENDENT - STREAM - FOR - CONFLUENCE <<< < < --------------- - - - - -- CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: ' TIME OF CONCENTRATION(MINUTES) = 16.23 RAINFALL INTENSITY (INCH. /HOUR) = 3.11 EFFECTIVE STREAM AREA(ACRES) = 7.70 ' TOTAL STREAM AREA(ACRES) = 7.70 PEAK FLOW RATE(CFS) AT CONFLUENCE = 18.20 FLOW PROCESS FROM NODE 14.00 TO NODE 15.00 IS CODE = 2 ---------------------------------------------------------- ' -- >>>>>RATIONAL - METHOD - INITIAL - SUBAREA - ANALYSIS << < << ------------------ - - - - -- DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE TC = K *[(LENGTH ** 3.00) /(ELEVATION CHANGE)) ** .20 INITIAL SUBAREA FLOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 1579.00 ' DOWNSTREAM ELEVATION = 1561.00 ELEVATION DIFFERENCE = 18.00 SOIL CLASSIFICATION IS "A" ' RESIDENTIAL - / 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA RUNOFF(CFS) = 7.85 TOTAL AREA(ACRES) = 2.90 PEAK FLOW RATE(CFS) - 7.85 FLOW PROCESS FROM NODE 15.00 TO NODE 17.00 IS CODE = 6 > » >> COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<<<<< --------------- - - - - -- UPSTREAM ELEVATION = 1561.00 DOWNSTREAM ELEVATION = 1541.00 STREET LENGTH(FEET) = 1000.00 CURB HEIGTH(INCHES) = 8. STREET HALFWIDTH(FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 ' * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 11.63 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .54 HALFSTREET FLOODWIDTH(FEET) = 13.31 AVERAGE FLOW VELOCITY(FEET /SEC.) = 4.54 PRODUCT OF DEPTH &VELOCITY = 2.47 STREETFLOW TRAVELTIME(MIN) = 3.67 TC(MIN) = 17.44 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.959 SOIL CLASSIFICATION IS "A" ' RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 3.40 SUBAREA. RUNOFF(CFS) = 7.57 EFFECTIVE AREA(ACRES) - 6.30 AVERAGED Fm(INCH /HR) _ .485 ' TOTAL AREA(ACRES) = 6.30 PEAK FLOW RATE(CFS) = 14.03 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .57 HALFSTREET FLOODWIDTH(FEET) = 14.56 FLOW VELOCITY(FEET /SEC.) = 4.82 DEPTH *VELOCITY = 2.75 - - FLOW PROCESS FROM NODE 17.00 TO NODE 17.00 IS CODE = 1 ---- ------- ----- ----- --- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE < <<<< ' - - >>> >> AND - COMPUTE - VARIOUS - CONFLUENCED STREAM - VALUES< <<< < ------------- - - - - -- CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: ' TIME OF CONCENTRATION(MINUTES) = 17.44 RAINFALL INTENSITY (INCH. /HOUR) = 2.96 EFFECTIVE STREAM AREA(ACRES) = 6.30 TOTAL STREAM AREA(ACRES) = 6.30 ' PEAK FLOW RATE(CFS) AT CONFLUENCE = 14.03 CONFLUENCE INFORMATION: ' STREAM PEAK FLOW TIME INTENSITYFMEFFECTIVE - - -- A( NUMBER RATE(CFS) (MIN.) (INCH /HOUR) (IN /HR) AREACRES) ------------------------------ ---- ---- 1 18.20 16.23 3.111 .49 7.70 2 14.03 17.44 2.959 .49 6.30 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO ' CONFLUENCE FORMULA USED FOR 2 STREAMS. SUMMARY RESULTS: 1 k --------------------------------------- 1 32.06 13.56 2 31.18 14.00 AS FOLLOWS: COMPUTED CONFLUENCE ESTIMATES ARE PEAK FLOW RATE(CFS) = 32.06 TIME(MINUTES) = 16.234 EFFECTIVE AREA(ACRES) = 13.56 ' TOTAL AREA(ACRES) = 14.00 END OF STUDY SUMMARY: TOTAL AREA(ACRES) = 14.00 EFFECTIVE AREA(ACRES) = 13.56 PEAK FLOW RATE(CFS) = 32.06 END OF RATIONAL METHOD ANALYSIS 1 k 1 RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE (Reference: 1986 SAN BERNARDINO CO. HYDROLOGY CRITERION) Copyright 1983,86,87 Advanced Engineering Software (aes) Ver. 4.1C Release Date: 5/11/87 Serial # I00937 Especially prepared for: ' J.P. KAPP & ASSOCIATES, INC. * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION CF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * TRACT NO. 14276 * HYDROLOGY STUDY * 25 YEAR STORM FILE NAME: HUNTERS.1 TIME /DATE OF STUDY: 10:23 5/ 7/1990 -- USER - SPECIFIED - HYDROLOGY AND - HYDRAULIC - MODEL - INFORMATION ----------------- -- *TIME -OF- CONCENTRATION MODEL*-- USER SPECIFIED STORM EVENT(YEAR) = 25.00 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE _ .95 *USER- DEFINED LOGARITHMIC INTERPOLATION USED FOR RAINFALL* 10 -YEAR STORM 60- MINUTE INTENSITY(INCH /HOUR) = 1.060 100 -YEAR STORM 60- MINUTE INTENSITY(INCH /HOUR) = 1.590 COMPUTED RAINFALL INTENSITY DATA: STORM EVENT = 25.00 1 -HOUR INTENSITY(INCH /HOUR) = 1.2461 SLOPE OF INTENSITY DURATION CURVE _ .7000 FLOW PROCESS FROM NODE 1.00 TO NODE 2.00 IS CODE = 2 ---------------------------------------------------------------------------- >>> >> RATIONAL METHOD INITIAL SUBAREA ANALYSIS< < <<< --------------------------- DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE TC = K *[(LENGTH ** 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 1550.00 DOWNSTREAM ELEVATION = 1530.00 - ELEVATION DIFFERENCE = 20.00 TC = .389 *[( 1000.00 ** 3.00)/( 20.00)] ** .20 - 13.482 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.543 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA RUNOFF(CFS) = 8.53 TOTAL AREA(ACRES) = 3.10 PEAK FLOW RATE(CFS) = 8.53 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** -- FLOW - PROCESS FROM NODE 2.00 TO NODE 3.00 IS CODE = 6 > > > >> COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA <<< << UPSTREAM ELEVATION = 1530.00 DOWNSTREAM ELEVATION = 1517.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 12.48 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .58 HALFSTREET FLOODWIDTH(FEET) = 15.19 ' AVERAGE FLOW VELOCITY(FEET /SEC.) = 4.03 PRODUCT OF DEPTH &VELOCITY = 2.35 STREETFLOW TRAVELTIME(MIN) = 3.72 TC(MIN) = 17.20 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.988 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(iNCH /HR) _ .4850 SUBAREA AREA(ACRES) = 3.50 SUBAREA RUNOFF(CFS) = 7.88 EFFECTIVE AREA(ACRES) = 6.60 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 6.60 PEAK FLOW RATE(CFS) = 14.87 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .61 HALFSTREET FLOODWIDTH(FEET) = 16.44 FLOW VELOCITY(FEET /SEC.) = 4.26 DEPTH *VELOCITY = 2.58 1 -- FLOW - PROCESS FROM NODE 3.00 TO NODE - - - -- 3_00 - IS - CODE = 1 > >>> >DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE << < << CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MINUTES) = 17.20 RAINFALL INTENSITY (INCH. /HOUR) = 2.99 EFFECTIVE STREAM AREA(ACRES) = 6.60 TOTAL STREAM AREA(ACRES) = 6.60 PEAK FLOW RATE(CFS) AT CONFLUENCE = 14.87 FLOW PROCESS FROM NODE 4.00 TO NODE 5.00 IS CODE = 2 --------------- ------- -------- -------- -------------- ------------------------ >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE - ** ELEVATION CHANGE)] ** .20 TC - K *[(LENGTH x.00)/( ' INITIAL SUBAREA FLOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 1546.00 DOWNSTREAM ELEVATION = 1524.00 ELEVATION DIFFERENCE = 22.00 TC = .389 *[( 1000.00 ** 3.00)/( 22.00)] ** .20 = 13.227 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.591 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA RUNOFF(CFS) = 7.83 TOTAL AREA(ACRES) = 2.80 PEAK FLOW RATE(CFS) - 7.83 FLOW PROCESS FROM NODE 5.00 TO NODE 3.00 IS CODE = 6 ------------------------------------------------------------- » >> >COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<<<<< N C it I 7 i_ 0 `J C u STREET LENGTH(FEET) = 530.S0 CURB HEIGTH(INCHES) = E�. STREET HALFWIDTr(FEET) = 18.00 DISTANCE FROM CPOWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECiMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVEL TIME COMPUTED USING MEAN FLOW(CFS) = 9.78 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .54 HALFSTREET FLOODWIDTH(FEET) = 13.31 AVERAGE FLOW VELOCITY(FEET /SEC.) = 3.82 PRODUCT OF DEPTH &VELOCITY = 2.08 STREETFLOW TRAVELTIME(MIN) = 2.31 TC(MIN) = 15.54 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.208 SOIL CLASSIFICATION IS "A" RESIDENTIAL -� 5 -7 DWELLINGS /ACP,E SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 1.60 SUBAREA RUNOFF(CFS) = 3.92 EFFECTIVE AREA(ACRES) = 4.40 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 4.40 PEAK FLOW RATE(CFS) = 10.78 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .57 HALFSTREET FLOODWIDTH(FEET) = 14.56 FLOW VELOCITY(FEET /SEC.) = 3.71 DEPTH *VELOCITY = 2.11 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 3.00 TO NODE 3.00 IS CODE = 1 ---------------------------------------------------------------------------- >>> >> DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<< > > > > >AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<</ ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MINUTES) = 15.54 RAINFALL INTENSITY (INCH. /HOUR) = 3.21 EFFECTIVE STREAM AREA(ACRES) = 4.40 TOTAL STREAM AREA(ACRES) = 4.40 PEAK FLOW RATE(CFS) AT CONFLUENCE = 10.78 CONFLUENCE INFORMATION: STREAM PEAK FLOW TIME INTENSITY FM EFFECTIVE NUMBER RATE(CFS) (MIN.) (INCH /HOUR) (IN /HR) AREA(ACRES) 1 14.87 17.20 2.988 .49 6.60 2 10.78 15.54 3.208 .49 4.40 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. SUMMARY RESULTS: STREAM CONFLUENCE EFFECTIVE NUMBER Q(CFS) AREA(ACRES) --------------------------------------------- 1 24.78 11.00 2 25.39 10.36 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 25.39 TIME(MINUTES) = 15.541 EFFECTIVE AREA(ACRES) = 10.36 TOTAL AREA(ACRES) = 11.00 i 1 >>>i:i1f'lNU I t h- _- =: l HA` LL l iMt I HKU .UbihtW< i i< > > > >> USING COMP_TER- ESTIMATED PIPESIZE (NCN- PRESSURE =LOt1w n < DEPTH OF FLOW !W 27.0 INCH PIPE IS 19.0 INCHES PIPEFLOWW VELOCI f(FEET /SEC.) = 8.5 ' UPSTREAM NODE ELEVATION = 1517.00 DOWNSTREAM NODE ELEVATION = 1512.00 FLOWLENGTH(FEET) = 500.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 27.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 25.39 TRAVEL TIME(MIN.) = .98 TC(MIN.) = 16.52 FLOW PROCESS FRCM NODE 3.00 TO NODE 3.00 IS CODE = 1 > >> > >DESIGNATE i'JDEPENDENT STREAM FOR CONFLUENCE<<<<! ------- - - - - -- CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: t TIME OF CONCENTRATION(MINUTES) = 16.52 RAINFALL INTENSITY (INCH. /HOUR) = 3.07 EFFECTIVE STREAM AREA(ACRES) = 10.36 TOTAL STREAM AREA(ACRES) = 11.00 PEAK FLOW RATE(CFS) AT CONFLUENCE = 25.39 FLOW PROCESS FROM NODE 7.00 TO NODE 7.10 IS CODE = 2 >> >>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< < << --------------------------- DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE TC = K *E(LENGTH ** 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA. ?LOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 1550.00 DOWNSTREAM ELEVATION = 1531.00 ELEVATION DIFFERENCE = 19.00 TC = .389 *E( 1000.00 ** 3.00)%( 19.00)] ** .20 = 13.621 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.518 SOIL CLASSIFICATION IS "A'' RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA RUNOFF(CFS) = 10.65 TOTAL AREA(ACRES) = 3.90 PEAK FLOW RATE(CFS) = 10.65 FLOW PROCESS FROM NODE 7.10 TO NODE 8.00 IS CODE = 6 ---------------------------------------------------------------------------- ' - - > > > >> COMPUTE- STREETFLOW- TRAVELTIME -THRU- SUBAREA < < <<<---------------- - - - - -- UPSTREAM ELEVATION = 1531.00 DOWNSTREAM ELEVATION = 1520.00 ' STREET LENGTH(FEET) = 860.00 CURB HEIGTH(INCHES) = 8. STREET HALFWIDTH(FEET) = 18.00 ' DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER, OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 13.79 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH( FEET) -_ -- .61 PROCUCT !F DEPTH &VELOCITY = 2.40 STREETFLOW TRAJELTIME(MIN; = 3.63 TC(MIN) = 17.25 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.982 SOIL CLASSIFICATION IS "A'' RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Rmf:WCH /HR) _ .4850 SUBAREA AREA(ACRES) = 2.80 SUBAREA RUNOFF(CFS) = 5.29 EFFECTIVE AREA(ACRES) = 6.70 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 6.70 PEAK FLCW RATE(CFS) = 15.06 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .62 HALFSTREET FLOODWIDTH(FEET) = 17.06 FLOW VELOCITY(FEET /SEC.) = 4.07 DEPTH *VELOCITY = 2.52 FLOW PROCESS FROM NODE 10.00 TO NODE 8.00 IS CODE = 8 ---------------------------------------------------------------------------- > >>>> ADDITION OF SUBAREA TO MAINLINE PEAK FLOW <<<<< 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.982 SOIL CLASSIFICATION IS "A'' RESIDENTIAL 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(14CH /HR) _ .4850 SUBAREA AREA(ACRES) = 8.30 SUBAREA RUNOFF(CFS) _ 18.65 EFFECTIVE AREA(ACRES) = 15.00 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 15.00 PEAK FLOW RATE(CFS) = 33.71 TC(MIN) = 17.25 , S FLOW PROCESS FROM NODE 8.00 TO NODE 9.00 IS CODE = 3 > >>> >COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< - - >>>>> USING - COMPUTER-ESTIMATED - PIPESIZE - (NON_ PRESSURE FLCW)<<< < < ----- - - - - -- DEPTH OF FLOW IN 30.0 INCH PIPE IS 19.9 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 9.7 UPSTREAM NODE ELEVATION = 1520.00 DOWNSTREAM NODE ELEVATION = 1513.00 FLOWLENGTH(FEET) = 600.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 30.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 33.71 TRAVEL TIME(MIN.) = 1.03 TC(MIN.) = 18.28 ' - -FLOW- PROCESS - FROM - NODE - - - -- 9_00 -TO- NODE - - - -- 9_00 -IS- CODE 8 - _--- ------ - - - - -- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW <<< << 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.863 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 3.60 SUBAREA RUNOFF(CFS) = 7.71 EFFECTIVE AREA(ACRES) = 18.60 AVERAGED Fm(INCH /HR) - .485 TOTAL AREA(ACRES) = 18.60 PEAK FLOW RATE(CFS) = 39.82 TC(MIN) = 18.28 >>>>>ADDITICh OF SUBAREA TO MAINLINE PEAK FLOW ' <'< 25 YEAR RAINFALL INTENSITY(INCH /HOUR` = 2.863 SOIL CLASSIFICA -ION IS "A" RESIDENTIAL -> S -7 DWELLINGS /ACRE SUBAREA LOSS RATE, FN IKOH /HR) = µo5 SUBAREA AREPACRES) = 2.40 SUBAREA RUNOFF(CFS) _ i.14 EFFECTIVE AREA(ACRES) = 21.00 AVERAGED Fm(INCH /HR) _ .485 ' TOTAL AREA(ACRES) = 21.00 PEAK FLOW RATE(CFS) = 44.95 TC(MIN) = 18.28 FLOW PROCESS FROM NODE 9.00 TO NODE 6.00 IS CODE = 3 ' ---------- ---- ------------ > » >> COMPUTE PIFEFLOW TRAVELTIME - THRU - SUBAREA<<<<< ------------------------ > > >>>USING COMPUTER- ESTIMATED PIPESIZE (NON- PRESSURE FLOW W < << DEPTH OF FLOW IN 27.0 INCH PIPE IS 20.8 INCHES PIPEFLOW VELOCI Y(FEET /SEC.) = 13.7 ' UPSTREAM NODE ELEVATION = 1513.00 - DOWNSTREAM NODE ELEVATION = 1512.00 FLOWLENGTH(FEET) = 40.00 MANNINGS N .013 ESTIMATED PIPE DIAMETER(INCH) = 27.00 NUMBER OF PIPES = 1 ' PIPEFLOW THRU SUBAREA(CFS) = 44.95 TRAVEL TIME(MIN.) = .05 TC(MIN.) = 18.33 FLOW PROCESS FROM NODE 6.00 TO NODE 6.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<< >>> > >AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MINUTES) = 18.33 RAINFALL INTENSITY (INCH. /HOUR) = 2.86 EFFECTIVE STREAM AREA(ACRES) = 21.00 TOTAL STREAM AREA(ACRES) = 21.00 PEAK FLOW RATE(CFS) AT CONFLUENCE = 44.95 CONFLUENCE INFORMATION: STREAM PEAK FLOW TIME INTENSITY FM EFFECTIVE NUMBER RATE(CFS) (MIN.) (INCH /HOUR) (IN /HR) AREA(ACRES) - - - - 1 - -- 25.39 16.52 - - - - -- 3.073 - - - .49 ------ 10.35 - -- 2 44.95 18.33 2.858 .49 21.00 ' RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. SUMMARY RESULTS: ' STREAM CONFLUENCE EFFECTIVE NUMBER Q(CFS) AREA(ACRES) --------------------------------------------- 1 69.59 29.29 2 68.23 31.36 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 69.59 TIME(MINUTES) = 16.521 EFFECTIVE AREA(ACRES) = 29.29 TOTAL AREA(ACRES) = 32.00 >> >> 'COMPUTE P= PEFLGW TRAVELTIME THRU SUBAREA<<<<< - - >>> >> USING - CCMPI ER- ESTIMATED PIPESIZE i'iON- PRESSURE FLOW)< < < < < ----- - - - - -- DEPTH OF FLOW Itl 36.0 INCH PIPE IS 25.1 INCHES PIPEFLOW VELOCI7Y(FEET /SEC.) = 12.7 UPSTREAM NODE ELEVATION = 1512.00 DOWNSTREAM NODE ELEVATION = 1509.00 FLOWLENGTH(FEET) = 200.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 69.59 TRAVEL TIME(MIN.; _ .26 TC(MIN.) = 16.78 FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS CODE = 8 SUBAREA TO MAI'JLItJE PEAK FLOW <<<<< >>> ''ADDITION CF 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.040 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(I'!CH /HR) _ .4850 SUBAREA AREA(ACRES) = 1.70 SUBAREA RUNOFF(CFS) = 3.91 EFFECTIVE AREA(ACRES) = 30.99 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 33.70 ' PEAK FLOW RATE(CFS) = 71.26 TC(MIN) = 16.78 FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS CODE = 8 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<< << 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.040 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 2.80 SUBAREA RUNOFF(CFS) = 6.44 EFFECTIVE AREA(ACRES) = 33.79 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 36.50 PEAK FLOW RATE(CFS) = 77.70 TC(MIN) = 16.78 FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS CODE = 8 - ' ---------------------------------------------------------------------------- -- >>>>>ADDITION - OF - SUBAREA - TO - MAINLINE - PEAK - FLOW <<<<<----------------- - - - - -- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) 3.040 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 ' SUBAREA AREA(ACRES) = 2.40 SUBAREA RUNOFF(CFS) = 5.52 EFFECTIVE AREA(ACRES) = 36.19 AVERAGED Fm(INCH /HR) _ .485 ' TOTAL AREA(ACRES) = 38.90 PEAK FLOW RATE(CFS) = 83.22 TC(MIN) = 16.78 FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS ---------------------------------------------------------------------- CODE = 8 - - - - -- r 7 s �v- LJ I Chf1 rt tl- � y I I 1, L14%, rl/ n Vn / - v VNV SOIL CLASSIFICA ION IS "A" RESIDENTIAL —. ; -7 DWELLINGS /ACRE SUBAREA LOSS RATE, F /HR) _ .4850 1 10.35 SUBAREA AREA(ACRES) = 4.50 SUBAREA RUNOFF(CFS) = EFFECTIVE AREA(ACRES) = 40.69 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 43.40 PEAK FLOW RATE(CFS) = 93.56 TC(MIN) = 16.78 END OF STUDY SUMMARY: TOTAL AREA(ACRES) = 43.40 EFFECTIVE AREA(;CRES) 40.69 PEAK FLOW RATE(CFS) _ 93.56 ' END OF RATIONAL METHOD ANALYSIS r 7 s �v- RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE (Reference: 1986 SAN BERNARDINO CO. HYDROLOGY CRITERION) Copyright 1983,86,87 Advanced Engineering Software (aes) Ver. 4.1C Release Date: 5/11/87 Serial # I00937 Especially prepared for: J.P. KAPP & ASSOCIATES, INC. * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * TRACT NO. 14277 * HYDROLOGY STUDY * 25 YEAR STORM FILE NAME: HUNTERS.DAT TIME /DATE OF STUDY: 6: 2 5/ 7/1990 USER SPECIFIED - HYDROLOGY - AND - HYDRAULIC - MODEL - INFORMATION: ----------- - - - - -- -- *TIME -OF- CONCENTRATION MODEL*- - USER SPECIFIED STORM EVENT(YEAR) = 25.00 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE _ .95 *USER - DEFINED LOGARITHMIC INTERPOLATION USED FOR RAINFALL* 10 -YEAR STORM 50- MINUTE INTENSITY(INCH /HOUR) = 1.060 100 -YEAR STORM 60- MINUTE INTENSITY(INCH /HOUR) = 1.590 COMPUTED RAINFALL INTENSITY DATA: STORM EVENT = 25.00 1 -HOUR INTENSIT`'(INCH /HOUR) = 1.2461 SLOPE OF INTENSITY DURATION CURVE _ .7000 FLOW PROCESS FROM NODE 1.00 TO NODE 2.00 IS CODE = 2 ---------------------------------------------------------------------------- > > >>> RATIONAL METHOD INITIAL SUBAREA ANALYSIS< M < NATURAL AVERAGE COVER ' TC = K *[(LENGTH ** 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 450.00 UPSTREAM ELEVATION = 1613.00 ' DOWNSTREAM ELEVATION = 1591.00 - ELEVATION DIFFERENCE = 22.00 TC = .706 *[( 450.00 ** 3.00)/( 22.00)] ** .20 14.868 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.309 SOIL CLASSIFICATION IS "A" NATURAL AVERAGE COVER "GRASS" SUBAREA LOSS RATE, Fm(INCH /HR) _ .8200 SUBAREA RUNOFF(CFS) = 12.77 TOTAL AREA(ACRES) = 5.70 PEAK FLOW RATE(CFS) = 12.77 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** - - FLOW PROCESS FROM NODE 2.00 TO NODE 3.00 IS CODE = 6 >>>>> COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA << < << UPSTREAM ELEVATION = 1591.00 DOWNSTREAM ELEVATION = 1551.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET ;ROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 16.90 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .54 HALFSTREET FLOODWIDTH(FEET) = 13.31 AVERAGE FLOW VELOCITY(FEET /SEC.) = 6.60 PRODUCT OF DEPTH &VELOCITY = 3.59 STREETFLOW TRAVELTIME(MIN) = 2.53 TC(MIN) = 17.39 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.965 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 3.70 SUBAREA RUNOFF(CFS) = 8.26 EFFECTIVE AREA(ACRES) = 9.40 AVERAGED Fm(INCH /HR) _ .688 TOTAL AREA(ACRES) = 9.40 PEAK FLOW RATE(CFS) = 19.26 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .57 HALFSTREET FLOODWIDTH(FEET) = 14.56 FLOW VELOCITY(FE =T /SEC.) = 6.62 DEPTH *VELOCITY = 3.77 - - FLOW - PROCESS - FROM - NODE - - - -- 3_00 - TO - NODE - - - -- 4_00 - IS - CODE - _--- 6------ - - - - -- >>>>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<<<<< ' UPSTREAM ELEVATION = 1551.00 DOWNSTREAM ELEVATION = 1528.00 STREET LENGTH(FEET) = 880.00 CURB HEIGTH(INCHES) = 8. STREET HALFWIDTH(FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET CROSSFALL(DECIMAL) .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 0 J * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) _ STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .63 HALFSTREET FLOODWIDTH(FEET) = 17.69 AVERAGE FLOW VELOCITY(FEET /SEC.) = 5.70 PRODUCT OF DEPTH &VELOCITY = 3.60 STREETFLOW TRAVELTIME(MIN) = 2.57 TC(MIN) = 19.97 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.692 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, SUBAREA AREA(ACRES) = 3.10 SUBAREA RUNOFF(CFS) EFFECTIVE AREA(ACRES) = 12.50 AVERAGED Fm(INCH /HR) _ .638 TOTAL AREA(ACRES) = 12.50 PEAK FLOW RATE(CFS) = END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .63 HALFSTREET FLOODWIDTH(FEET) _ FLOW VELOCITY(FEET /SEC.) = 5.90 DEPTH *VELOCITY = 22.34 Fm(INCH /HR) _ .4850 6.16 23.11 17.69 3.73 - - FLOW PROCESS FROM NODE 4.00 TO NODE 4.00 IS CODE = 1 --------------- - -- CONFLUENCE VALUTT USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTFATION(MINUTES) = 19.97 RAINFALL INTENS:7Y (INCH./HOUR) = 2.59 EFFECTIVE STREAM AREA(ACRES) = 12.5C TOTAL STREAM AREA(ACRES) = 12.50 PEAK FLOW RATE( :FS) AT CONFLUENCE = 23.11 FLOW PROCESS FROM NODE 5.00 TO NODE 6.00 IS CODE = 2 ---------------------------------------------------------------------------- > >>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE TC = K *[(LENGTH ** 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 1582.00 DOWNSTREAM ELEVATION = 1551.00 ELEVATION DIFFERENCE = 31.00 TC = .389 *[( 1000.00 ** 3.00)/( 31.00)] ** .20 = 12.350 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.768 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA RUNOFF(CPS) = 7.39 TOTAL AREA(ACRES) = 2.50 PEAK FLOW RATE(CFS) = 7.39 FLOW PROCESS FROM NODE 6.00 TO NODE 7.00 IS CODE = 6 ---------------------------------------------------------------------------- - - > >>>> COMPUTE STREETFLOW TRAVELTIME - THRU - SUBAREA < <<< < ---------------- - - - - -- UPSTREAM ELEVATION = 1551.00 DOWNSTREAM ELEVATION = 1528.00 STREET LENGTH(FEET) = 830.00 CURB HEIGTH(INCHES) = 8. STREET HALFWIDT(FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 .4850 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 9.52 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .48 HALFSTREET FLOODWIDTH(FEET) = 10.19 AVERAGE FLOW VELOCITY(FEET /SEC.) = 5.21 PRODUCT OF DEPTH &VELOCITY = 2.51 STREETFLOW TRAVELTIME(MIN) = 2.66 TC(MIN) = 15.01 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.288 ' SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ SUBAREA AREA(ACRES) = 1.70 SUBAREA RUNOFF(CFS) EFFECTIVE AREA(ACRES) = 4.20 = 4.29 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 4.20 PEAK FLOW RATE(CFS) = 10.59 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .51 HALFSTREET FLOODWIDTH(FEET) = 11.44 FLOW VELOCITY(FEET /SEC.) = 5.05 DEPTH *VELOCITY = 2.56 .4850 >>>> >DESIGNATE :'!DEPENDENT STREAM FOR SQNFLUENCE' <<<< -- >>>;>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES <'<< CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MINUTES) = 15.01 RAINFALL INTENSITY (INCH./HOUR) = 3.29 EFFECTIVE STREAM AREA(ACRES) = 4.20 TOTAL STREAM AREA(ACRES) = 4.20 PEAK FLOW RATE(CFS) AT CONFLUENCE = 10.59 CONFLUENCE INFORMATION: STREAM PEAK FLOW TIME INTENSITY FM EFFECTIVE NUMBER RATE(CFS) (MIN.) (INCH /HOUR.) (IN /HR) AREA(ACRES) -------------------------------------------------------------- 1 23.11 19.97 2.692 .64 12.E 2 10.59 15.01 3.288 .49 4.2 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. SUMMARY RESULTS: STREAM CONFLUENCE EFFECTIVE -- NUMBER C(CFS) AREA(ACRES) 1 31.45 16.70 2 33.00 13.59 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 33.00 TIME(MINUTES) = 15.0O5 EFFECTIVE AREA(ACRES) = 13.59 TOTAL AREA(ACRES) = 16.70 FLOW PROCESS FROM NODE 8.00 TO NODE 9.00 IS CCDE = 2 ---------------------------------------------------------------------------- >>>> >RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<------------------------ DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE TC = K *[(LENGTH ** 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 1583.00 DOWNSTREAM ELEVATION = 1548.00 ELEVATION DIFFERENCE = 35.00 TC = .389 *[( 1000.00 ** 3.00)/( 35.00)] ** .20 = 12..:54 ' 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.832 - SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) - .4850 SUBAREA RUNOFF(CFS) = 20.18 ' TOTAL AREA(ACRES) = 6.70 PEAK FLOW RATE(CFS) = 20.18 FLOW PROCESS FRCM NODE 9.00 TO NODE 10.00 IS CODE = 6 ---------------------------------------------------------------------------- >>> >> COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<<< < UPSTREAM ELEVATION = 1548.00 DOWNSTREAM ELEVATION = 1535.00 STREET LENGTH(FEET) = 620.00 CURB HEIGTH(INCHES) = 8. STREET HALFWIDTH(FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET CROSSFALL(DECIMAL) _ .040 C� J i u 0 i u ri 1 r i * *TRAVEL 7 1ME COMPUTED USING MEAN FLOW(CFS) = 23.38 * * *STREETFLCW SPLITS OVER STREET- CROWN * ** FULL DEPTH(FEE7) _ .64 FLOODWIDTH(FEET) = 18.00 FULL HALF - STREET VELOCITY(FEET /SEC.) = 5.16 SPLIT DEPTH(FEET) _ .33 SPLIT FLOODWIDTH(FEET) = 5.19 SPLIT VELOCITY(FEET /SEC.) = 3.76 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .64 HALFSTREET FLOODWIDTH(FEET) = 18.00 AVERAGE FLOW VELOCITY(FEET /SEC.) = 5.16 PRODUCT OF DEPTH &VELOCITY = 3.29 STREETFLOW TRAVELTIME(MIN) = 2.00 TC(MIN) = 14.06 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.441 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA. LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 2.40 SUBAREA RUNOFF(CFS) = 5.39 EFFECTIVE AREA(ACRES) = 9.10 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 9.10 PEAK FLOW RATE(CFS) = 24.21 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .64 HALFSTREET FLOODWIDTH(FEET) = 18.00 FLOW VELOCITY(FEET /SEC.) = 5.16 DEPTH *VELOCITY = 3.29 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 10.00 TO NODE 10.00 IS CODE = 8 > > > >>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW < <<<< 25 YEAR RAINFALL INTENSITY(INCH /HOUR = 3.441 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 3.70 SUBAREA RUNOFF(CFS) = 9.84 EFFECTIVE AREN ACRES) = 12.80 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 12.80 PEAK FLOW RATE(CFS) = 34.06 TC(MIN) = 14.06 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 3 >>>>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< > >>>> USING COMPUTER- ESTIMATED PIPESIZE (NON- PRESSURE FLOW)<<<<< DEPTH OF FLOW IN 24.0 INCH PIPE IS 18.7 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 12.9 UPSTREAM NODE ELEVATION = 1535.00 DOWNSTREAM NODE ELEVATION = 1514.00 FLOWLENGTH(FEET) = 800.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 34.06 TRAVEL TIME(MIN.) = 1.03 TC(MIN.) = 15.09 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** - - FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS CODE = 8 ---------------------------------------------------------------------- > > > > >ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< -------------------- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.275 FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS CODE = 8 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<< --------------------------- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.275 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(I'1CH /HR) _ .4850 SUBAREA AREA(ACRES) = 5.30 SUBAREA RUNOFF(CFS) = 13.31 EFFECTIVE AREA(ACRES) = 21.30 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 21.30 PEAK FLOW RATE(CFS) = 53.49 TC(MIN) = 15.09 SUBAREA AREA(ACRES) SUBAREA RUNUFF(CFS) = 0.04 EFFECTIVE AREA(ACRES) AVERAGED Fm(INCH /HR) = 16.00 _ .485 TOTAL AREA(ACRES) = 16.00 PEAK FLOW RATE(CFS) = 40.18 TC(MIN) = 15.09 FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS CODE = 8 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<< --------------------------- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.275 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(I'1CH /HR) _ .4850 SUBAREA AREA(ACRES) = 5.30 SUBAREA RUNOFF(CFS) = 13.31 EFFECTIVE AREA(ACRES) = 21.30 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 21.30 PEAK FLOW RATE(CFS) = 53.49 TC(MIN) = 15.09 PROCESS FROM NODE 11.00 TO NODE 12.00 IS CODE = 3 - - FLOW >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< USING - COMPUTER-ESTIMATED - PIPESIZE - (NON_ PRESSURE FLOW)<< < << ----- - - - - -- - - >>>>> DEPTH OF FLOW IN 30.0 INCH PIPE IS 22.5 INCHES PIPEFLOW VELOCITY(FEET /SEC.) = 13.5 UPSTREAM NODE ELEVATION = 1514.00 DOWNSTREAM NODE ELEVATION = 1508.00 FLOWLENGTH(FEET) = 280.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 30.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 53.49 TRAVEL TIME(MIN.) _ .35 TC(MIN.) = 15.43 FLOW PROCESS FROM NODE 12.00 TO NODE 12.00 IS CODE = 8 » >> >ADDITION CF SUBAREA TO MAINLINE PEAK FLOW <<<<< -------- - - - - -- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.224 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = .40 SUBAREA RUNOFF(CFS) _ .99 EFFECTIVE AREA(ACRES) = 21.70 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 21.70 PEAK FLOW RATE(CFS) = 53.49 TC(MIN) = 15.43 FLOW PROCESS FROM NODE 12.00 TO NODE 12.00 IS CODE = 8 ---------------------------------------------------------------------------- >>>ADDITION SUBAREA MAINLINE PEAK FLOW < < < < < ----------------- - - - - -- - ->> - TO - - - 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.224 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(I.JCH /HR) _ .4850 AMHAULU WINCH/HR) _ . 4W TOTAL AREA(ACRES) = 22.70 PEAK FLOW RATE(CFS) = 55.95 TC(MIN) = 15.43 FLOW PROCESS FROM NODE 12.00 TO NODE 12.00 IS CODE = 8 -------- ----------------------- > > > >> ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<< << --------------------------- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.224 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 1.80 SUBAREA RUNOFF(CFS) = 4.44 EFFECTIVE AREA(ACRES) = 24.50 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 24.50 PEAK FLOW RATE(CFS) = 60.39 TC(MIN) = 15.43 FLOW PROCESS FROM NODE 12.00 TO NODE 12.00 IS CODE = 8 ---------------------------------------------------------------------------- >>>>> ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<< ---- - - - - -- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.224 SOIL CLASSIFICATION IS "A'' RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 2.60 SUBAREA RUNOFF(CFS) = 6.41 EFFECTIVE AREA(ACRES) = 27.10 ' AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 27.10 PEAK FLOW RATE(CFS) = 66.79 = = TC( MIN ==== 1F_ 43 ___________________________ _______________________________ END OF STUDY SUMMARY: ' TOTAL AREA(ACRES) = 27.10 EFFECTIVE AREA(ACRES) = 27.10 PEAK FLOW RATE(CFS) = 66.79 ------------------------------------ - - - - -- - END OF RATIONAL METHOD ANALYSIS 1 1 1 I� -- FILE - NAME: HUNTERS.4 TIME /DATE OF ST.:DY: 2:35 5/17/1990 USER SPECIFIED r(DROLOGY AND HYDRAULIC MODEL INFORMATIC': __ *TIME -OF- CONCENTRATION MODEL *-- _____________________ USER SPECIFIED ZTORM EVENT(YEAR) = 25.00 SPECIFIED MININuM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCE ?.T OF GRADIENTS(DECIMAL) TO USE FOR FRIG - :ON SLOPE *USER - DEFINED LOGARITHMIC INTERPOLATIOJ USED FOR PAINFA__* 10 -YEAR STORM 60- MINUTE INTENSITY(INCH /HOUR) = 1.060 100 -YEAR STORM Q- MINUTE INTENSITY(INCH /HOUR) = 1.590 COMPUTED RAINFAL- INTENSITY DATA: STORM EVENT = 25.00 1 -HOUR INTENSITY(INCH /HOUR; = '.1461 SLOPE OF INTENS: -Y DURATION CURVE = .7000 RAT :On AL METHOD HYDROLOGY COMPUTER PROGRAM PASKAGE (Refererce: 1986 SAN BERNARDIHO CO. HYDROLOGY C= :TERION) Copyrlgnt 1983,86,87 Advanced Engineering Software (aes) Ver. 4.1C Release Date: 5/11/87 Serial 4 : :3937 Especially prepared for: J.P. KAPP & ASSOCIATES, INC. * * * * * * * * * * * *x *x * * * * * * * ** DESCRIPTION OF STUDY * TRACT N0. 14570 * HYDROLOGY STUD'S � * 25 YEAR STORM FLOW PROCESS FFCM NODE 1.00 TO NODE 2.00 IS CO:E = 2 --- --------- ---- ---- --------- ---- ---- ------------------ > > > > >RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< ---------------------------------------- DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE fl TC = K *[(LENGTHx* 3.00) 1(ELEVATION CHANGE)> * INITIAL SUBAREA. FLOW- LENGTH = 900.00 UPSTREAM ELEVATION = 1696.00 DOWNSTREAM ELEVATION = 1665.00 ELEVATION DIFFERENCE = 31.00 TC = .389 *[( 900.00 ** 3.00)%( 31.00)] ** 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3. SOIL CLASSIFICA -ION IS "A" RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSE SUBAREA RUNOW CFS) = 7.15 .20 7 C .20 = 17.594 938 RATE, Fmv:`dCH /HR) = .4850 TOTAL AREA(ACRES) = 2.30 PEAK FLOW RATE(CFS) = 7.15 FLOW PROCESS FROM NODE 2.00 TO NODE 3.00 IS CODE = 6 ------------------------------------------------------------- > >>>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA <<<<< ------------------------ UPSTREAM ELEVA -:ON = 1665.00 DOWNSTREAM ELEVATION = 1644.00 STREET LENGTH(FEET) = 550.00 CURB HEIGTH(INCHES) _ i. QW07ST � i A 1 7W7M -' -CO" - 40 r.n i_!15 f ANUL roj l INTERICR STREE- SROSSFALL(DECIMAL) = .020 OUTSIDE STRE_ !rOSSFALL(DECIMAL) .040 SPECIFIED NUMSEP OF HALFSTREETS CARRYING RUNOFF = 1 ' * *TRAVEL -IME COMPUTED USING MEAN FLOW(CFS) STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .46 HALFSTPEET FLOODWIDTH(FEET) = 3.94 AVERAGE FLOW VELOCITY(FEET /SEC.) = 6.00 PRODUCT DF DEPTH &VELOCITY = 2.74 STREETFLOW TRAVELTIME(MIN) = 1.53 TC(MIN) = 13.12 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.611 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, = m(:'.CH /HR) _ .4850 SUBAREA AREVACRES) = 1.70 SUBAREA RUNOFF(CFS) _ l.78 EFFECTIVE AREA(ACRES) = 4.00 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 4.00 PEAK FLOW RATE(CFS) = v.25 END OF SUBAREA STREETFLOW HYDRAULICS: - DEPTH(FEET) = .48 HALFSTREET FLOODWIDTH(FEET) = 10.19 FLOW VELOCITY(FEET /SEC.) = 6.16 DEPTH *VELOCITY 2.97 FLOW PROCESS FROM NODE 3.00 TO NODE 4.00 IS CODE = 6 >> >> >COMPUTE STREETFLOW TRAVELTIME THRU SUBAREAi<<<< --------------- - -- UPSTREAM ELEVATION = 1644.00 DOWNSTREAM ELEVATION = 1615.00 STREET LENGTH( =EET) = 500.00 CURB HEIGTH(INCHES) = 8. STREET HALFWID7K FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREE- CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBED' OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) = 13.23 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .48 HALFSTREET FLOODWIDTH(FEET) = 10.19 ' AVERAGE FLOW VELOCITY(FEET /SEC.) = 7.24 PRODUCT OF DEPTH &VELOCITY = 3.49 STREETFLOW TRAVELTIME(MIN) = 1.15 TC(MIN) = 14.27 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.405 SOIL CLASSIFICATION IS "A'' RESIDENTIAL - > 5 -7 DWELLINGS %ACRE SUBAREA LOSS RATE, Fmv= NCH /HR) _ .*850 ' SUBAREA AREA(ACRES) = 1.50 SUBAREA RUNOFF(CFS) = 3.94 EFFECTIVE AREA(ACRES) = 5.50 AVERAGED Fm(INCH /HR) _ .485 ' TOTAL AREA(ACRES) = 5.50 PEAK FLOW RATE(CFS) = 14.45 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .49 HALFSTREET FLOODWIDTH(FEET) = 10.81 FLOW VELOCITY(FEET /SEC.) = 7.38 DEPTH *VELOCITY = S.0 FLOW PROCESS FROM NODE 4.00 TO NODE 4.00 IS CODE = 1 CONFLUENCE VAL_ES USED FOR IWDEPENDENT STREAM 1 ARE: TIME OF CONCEk = 14.27 RAINFALL INTEKS_Tf (INCH. /HOUP) = 3.40 EFFECTIVE STR.EXY AREA(ACRES) _ S.50 TOTAL STREAM A"EA(ACRES) = 5.50 PEAK FLOW RATE'SFS) AT CONFLUENCE = 14.45 FLOW PROCESS FROM NODE 5.00 TO NODE 7.00 IS CODE = 2 ---------------------------------------------------------------------------- - - > > > >> RATIONAL - METHOD - INITIAL - SUBAREA - ANALYSIS <<<< < ------------------ - - - - -- DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE TC = K *[(LENGTH=x 3.00) /(ELEVATION CHANGER** .20 INITIAL SUBAREA FLOW- LENGTH = 900.00 UPSTREAM ELEVATION = 1686.00 O DOWNSTREAM ELEVATION = 1657.00 ELEVATION DIFFERENCE = 29.00 TC = .389 *[( 900.00 ** 3.00)/( 29.00)] ** .20 = 11.749 25 YEAR RAIAFAcL INTENSITY(INCH /HOUR) = 3.502 - SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm( :ICH /HR) - .4850 SUBAREA RUNOFF(CFS) = 15.07 TOTAL AREA(ACRES) = 4.90 PEAK FLOW RATE(CFS) = 15.07 FLOW PROCESS FROM NODE 7.00 TO NODE 8.00 IS CODE = 6 ---------------------------------------------------------------------------- >>> >> COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<<<<<---------------------- UPSTREAM ELEVATION = 1657.00 DOWNSTREAM ELEVATION = 1615.00 STREET LENGTH(FEET) = 750.00 CURB HEIGTH(INCHES) _ _. STREET HALFWID = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(OFS) _ Z STREETFLOW MCDEL RESULTS: ' STREET FLOWDEPTH(FEET) _ .56 HALFSTREET FLOODWIDTH(FEET) = 13.94 AVERAGE PLOW VELOCITY(FEET /SEC.) = 7.79 PRODUCT OF DEPTH &VELOCITY = 4.34 STREETFLOW TRAVELTIME(MIN) = 1.60 TC(MIN) = 13.35 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.567 ' SOIL CLASSIFICATION IS "A'' RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm!_'iCH /HR) _ .4853 SUBAREA AREA(ACRES) = 4.50 SUBAREA RUNOFF(CFS) = 12.48 EFFECTIVE AREA(ACRES) = 9.40 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 9.40 PEAK FLOW RATE(CFS) = 0.08 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .59 HALFSTREET FLOODWIDTH(FEET) = 15.31 FLOW VELOCITY(PEET /SEC.) = 7.93 DEPTH *VELOCITY = 1.71 RAINFALL INTENSITY AND TIME OF CONCENTRATION RAT:O CONFLUENCE FCRMULA USED FOR 2 STREAMS. SUMMARY RESULTS: STREAM CONFLUENCE EFFECTIVE NUMBER -- - - - -- MRS) ---- AREA(ACRES) - 1 39.1E 14.90 2 40.3E 14.55 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE"CFS) = 40.35 TIME(MINUTES) = 13.ZE4 EFFECTIVE AREA(AGRES) = 14.55 TOTAL AREA(ACREE) = 14.90 FLOW PROCESS FROM NODE 4_10 TO NODE 9.00 IS CODE = 3 ------------------------- - -- - )>>>>COMPUTE P : ;EFLOW TRAVELTIME THRU SUBAREA<<<<< - - > > > >> USING CCMPOTER_ ESTIMATED PIPESIZE - (NON _PRESSURE FLCy)<< < << ----- - - - - -- DEPTH OF FLOW :4 24.0 INCH PIPE IS 14,9 INCHES PIPEFLOW VELOCI ((FEET /SEC.) = 19.7 UPSTREAM NODE = _EVATION = 1611.70 DOWNSTREAM NODE ELEVATION = 1607.00 FLOWLENGTH(FEE7; = 70.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SIBAREA(CFS) = 40.35 TRAVEL TIME(MIN.) _ .06 TC(MIN.) = 13.41 - - FLOW - PROCESS - -- NODE - - - -- 9_00 - NODE - - - -- 9 - CODE _--- 1 ------ - - - - -- >>>>>DESIGNATE : NDEPENDENT STREAM FOR CONFLUENCE<<<<< --------------- - - - - -- ------ - - - - -- ' CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENT-RATION(MINUTES) = 13.41 RAINFALL INTENSITY (INCH. /HOUR) = 3.56 EFFECTIVE STREAM AREA(ACRES) = 14.55 TOTAL STREAM A REA(ACRES) = 14.90 PEAK FLOW RATE(CPS) AT CONFLUENCE = 40.35 FLOW PROCESS FRCM NODE 10.00 TO NODE 11.00 IS CODE = 2 >>> >>RATIONAL '• "ETHOD INITIAL SUBAREA ANALYSIS< < <<< ;: >> ;DESIGNATE INDEPENDENT STREAM FOR :CHFLUEWCE't << >> > >>AND COMP07E VARIOUS STREAM - VALUES <<<il ------------- - - - - -- - CONFLUENCED - -- CONFLUENCE VAu.ES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCE5 =ATION(MINUTES) = 13.25 ' RAINFALL INTENSITY (INCH WHOUR) _ 3.57 EFFECTIVE STREAY AREA(ACRES) = 9.40 TOTAL STREAM APEA(ACRES) = 9.40 PEAK FLOW RATE {IFS) AT CONFLUENCE = 26.08 CONFLUENCE IJFCPAATION: STREAM PEAK FLDW TIME INTENSIT( FM EFFECTIVE ' NUMBER RATE' : =3) (MIN.) (INCH /HOUR) (IN /HR) AREA(ACRES, -------------------------------------------------------------- 1 14.45 14.27 3.405 .49 S.E� 2 26.08 13.35 3.567 .49 9.i0 RAINFALL INTENSITY AND TIME OF CONCENTRATION RAT:O CONFLUENCE FCRMULA USED FOR 2 STREAMS. SUMMARY RESULTS: STREAM CONFLUENCE EFFECTIVE NUMBER -- - - - -- MRS) ---- AREA(ACRES) - 1 39.1E 14.90 2 40.3E 14.55 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE"CFS) = 40.35 TIME(MINUTES) = 13.ZE4 EFFECTIVE AREA(AGRES) = 14.55 TOTAL AREA(ACREE) = 14.90 FLOW PROCESS FROM NODE 4_10 TO NODE 9.00 IS CODE = 3 ------------------------- - -- - )>>>>COMPUTE P : ;EFLOW TRAVELTIME THRU SUBAREA<<<<< - - > > > >> USING CCMPOTER_ ESTIMATED PIPESIZE - (NON _PRESSURE FLCy)<< < << ----- - - - - -- DEPTH OF FLOW :4 24.0 INCH PIPE IS 14,9 INCHES PIPEFLOW VELOCI ((FEET /SEC.) = 19.7 UPSTREAM NODE = _EVATION = 1611.70 DOWNSTREAM NODE ELEVATION = 1607.00 FLOWLENGTH(FEE7; = 70.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SIBAREA(CFS) = 40.35 TRAVEL TIME(MIN.) _ .06 TC(MIN.) = 13.41 - - FLOW - PROCESS - -- NODE - - - -- 9_00 - NODE - - - -- 9 - CODE _--- 1 ------ - - - - -- >>>>>DESIGNATE : NDEPENDENT STREAM FOR CONFLUENCE<<<<< --------------- - - - - -- ------ - - - - -- ' CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENT-RATION(MINUTES) = 13.41 RAINFALL INTENSITY (INCH. /HOUR) = 3.56 EFFECTIVE STREAM AREA(ACRES) = 14.55 TOTAL STREAM A REA(ACRES) = 14.90 PEAK FLOW RATE(CPS) AT CONFLUENCE = 40.35 FLOW PROCESS FRCM NODE 10.00 TO NODE 11.00 IS CODE = 2 >>> >>RATIONAL '• "ETHOD INITIAL SUBAREA ANALYSIS< < <<< TC = K*[(LENGTPxx 3.00)/(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA =LOW- LENGTH = 1000.00 UPSTREAM ELEVA' :QN = 1697.20 DOWNSTREAM ELEATION = 1660.00 ' ELEVATION DIFFE =ENCE = 37.00 TO = .389 *[( 1:00.00 ** 3.00) ( 37.00)] ** .20 = 11.921 25 YEAR RAINF INTENSITY(INCH /HOUR) = 3.862 ' SOIL CLASSIFICA - ION IS "A'' RESIDENTIAL - > 5 - DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(IMCH /HR) _ .4 SUBAREA RUNOFF(CPS) = 9.12 TOTAL AREA(ACRES) = 3.00 PEAK FLOW RATE(CFS) = 9.12 FLOW PROCESS FROM NODE 11.00 TO NODE 9.00 IS CODE = 6 ---------------------------------------------------------------------------- >>>>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<<<<< ' UPSTREAM ELEVATION = 1660.00 DOWNSTREAM ELEVATION = 1610.00 STREET LENGTH(FEZT) = 950.00 CURB HEIGTH(INCHES) _ i. STREET HALFWIDTH(FEET) = 18.00 ' DISTANCE FROM C ?OWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET SROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTP,EETS CARRYING RUNOFF = 1 * *TRAVEL 71ME COMPUTED USING MEAN FLOW(CFS) = 12.&0 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .48 ' HALFSTREET FLOODWIDTH(FEET) = 10.19 AVERAGE &LOW VELOCITY(FEET /SEC.) = 7.01 PRODUCT OF DEPTH &VELOCITY = 3.38 STREETFLOW TRAVE_TIME(MIN) = 2.26 TC(MIN) = 14.18 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.420 SOIL CLASSIFICA - ION IS "A'' ' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 2.80 SUBAREA RUNOFF(CFS) = 7.40 EFFECTIVE AREA(?CRES) = 5.80 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 5.80 PEAK FLOW RATE(CPS) = 15.32 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .51 HALFSTREET FLOODWIDTH(FEET) = 11.:4 FLOW VELOCITY(F =ET /SEC.) = 7.30 DEPTH *VELOCITY = 3.70 FLOW PROCESS FROM NODE 9.00 TO NODE 9.00 IS CODE = 1 ---------------------------------------------------------------------------- > >> > >DESIGNATE = NDEPENDENT STREAM FOR CONFLUENCE<<<<< > > > >>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: ' TIME OF CONCENTRATION(MINUTES) = 14.18 RAINFALL INTENSITY (INCH./HOUR) = 3.42 EFFECTIVE STREAM AREA(ACRES) = 5.80 TOTAL STREAM AREA(ACRES) = 5.80 PEAK FLOW RATE(CFS) AT CONFLUENCE = 15.32 CONFLUENCE INFCRMATION: STREAM PEAK FLOW TIME INTENSITY FM EFFECTIVE ail if Anr MA Tr /nr..\ f %AT41 \ ("rkllIJ /U/�I lr�\ TAI /IJo AOCh /AMO =C\ 2 15.22 14.18 3.420 .48 t RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. SUMMARY RESULTS: STREAM CONFLUENCE EFFECTIVE NUMBER Q(CFS) AREA(ACPES) 1 55.51 20.03 2 53.89 20.35 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: ' PEAK FLOW RATE(CFS) = 55.51 TIME(MINUTES) = 13.413 EFFECTIVE AREMACRES) = 20.03 TOTAL AREA(ACRES) = 20.70 -- FLOW - PROCESS -FPO -- NODE - - - -- 9_00 -TO- NODE - - - -- 9_00 -IS- CODE 8 - _--- ------ - - - - -- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<< <<< 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.556 SOIL CLASSIFICA -ION IS "A'' RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACPES) = 5.40 SUBAREA RUNOFF(CFS) _ 14.93 EFFECTIVE AREA(XCRES) = 25.43 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 26.10 PEAK FLOW RATE(CFS) = 70.29 TC(MIN) = 13.41 FLOW PROCESS FROM NODE 9.00 TO NODE 14.00 IS CODE = 3 t >> >>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< >> >>>USING COMPUTER - ESTIMATED PIPESIZE (NON- PRESSURE FLOW)<<< << DEPTH OF FLOW IN 33.0 INCH PIPE IS 24.3 INCHES PIPEFLOW VELOCI Y(FEET /SEC.) = 15.0 UPSTREAM NODE ELEVATION = 1607.00 DOWNSTREAM NODE ELEVATION = 1593.00 FLOWLENGTH(FEET) = 600.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 33.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 70.29 TRAVEL TIME(MIN.) = .67 TC(MIN.) = 14.08 FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 1 ------------------------------------------------------------------------ > » > >DESI SIGNATE ' ----- - --GNAT -- INDEPENDENT STREAM FOR CONFLUENCE<<<<< CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MINUTES) = 14.08 RAINFALL INTENSITY (INCH./HOUR) = 3.44 EFFECTIVE STREAM AREA(ACRES) = 25.43 TOTAL STREAM AREA(ACRES) = 26.10 PEAK FLOW RATE(CFS) AT CONFLUENCE = 70.29 FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 2 -------------------------------------------- - - - - -- DEVELOPMENT iS I-INGLE FAMILY RESIDENTIAL 5 -7 DWELLI'GS /ACRE ' TC = K *[(LENGTHx* 3.00) /(ELEVATION CHAN GEA ** .20 INITIAL SUBAREA FLOW- LENGTH = 1000.00 ' UPSTREAM ELEVATION = 1614.00 DOWNSTREAM ELEVATION = 1595.00 ELEVATION DIFFERENCE = 19.00 ' TC'= .389 *[( 1000.00 ** 3.00)/( 19.00)] ** .20 = 13.521 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.518 SOIL CLASSIFICATION IS 'A' RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(i'.CH /HR) _ .4350 ' SUBAREA RUNOFF(CFS) = 13.38 TOTAL AREA(ACRES) = 4.90 PEAK FLOW RATE(CFS) = 13.38 FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 6 ' > >> >> COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<<<<< UPSTREAM ELEVATION 1595.00 DOWNSTREAM ELEVATION = 1593.00 ' STREET LENGTH(FEET) = 350.00 CURB HEIGTH(INCHES) _ i. STREET HALFWIDTH(FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET :;ROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAV =_-IME COMPUTED USING MEAN FLOW(CFS) = 15.55 * * *STREETFLOW SLITS OVER STREET - CROWN * ** FULL DEPTH(FEET) = .64 FLOODWIDTH(FEET) FULL HALF - STREET VELOCITY(FEET /SEC.) = 2.69 ' SPLIT DEPTH(FEET) = .49 SPLIT FLOODWIDTH(FEET) = 10.81 SPLIT VELOCIT''(FEET /SEC.) = 2.40 STREETFLOW MOCEL RESULTS: ' STREET FLOWDEPTH(FEET) _ .64 HALFSTREET FLOODWIDTH(FEET) = 18.00 AVERAGE FLOW VELOCITY(FEET /SEC.) = 2.69 PRODUCT OF DEPTH &VELOCITY = 1.72 STREETFLOW TRAVELTIME(MIN) = 2.17 TC(MIN) = 15.79 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.173 SOIL CLASSIFICATION IS "A'' RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(! %CH /HR) _ .4850 SUBAREA AREA(ACRES) = 1.80 SUBAREA RUNOFF(CFS) = 4.35 EFFECTIVE AREA(ACRES) = 6.70 ' AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 6.70 PEAK FLOW RATE(CFS) = 76.21 END OF SUBAREA STREETFLOW HYDRAULICS: ' DEPTH(FEET) = .64 HALFSTREET FLOODWIDTH(FEET) = 18.00 FLOW VELOCITY(F =ET /SEC.) = 2.69 DEPTH *VELOCITY = 1.72 FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 1 ---------------------------------------------------------------------------- > >> > >DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE�<<<< >>>> >AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES < <<<< CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MINUTES) = 15.79 11 TAlr.l . T.IT ".I��T./ / T \1/11 11/'\111".\ _ / •' PEAT. 7LOW :=LATE ' 17S ) AT CONFLUENCE = 16.21 ' FLOW PROCESS FPOM NODE 15.00 TO NODE ---- ---- --------- 16.00 IS CODE = 8 ---- ---- ------------------ ------ -------- ----- ----- --------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK CCNFLUENCE I",FCPMATION: 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.437 STREAM PEAK. =_OW TIME INTENSITY FM EFFECTIVE ' NUMBER RATE(CFS) (MIN.) (INCH /HOUR) (IN /HP) AREA(ACRES) SUBAREA AREA(ACRES) = 3.40 SUBAREA -- -------------------------------------------------------- 1 70.29 14.08 3.437 .49 25.43 2 16.2' 15.79 3.173 .49 6.70 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO ' PEAK FLOW RATE( :FS) = 92.49 CONFLUENCE FORMULA USED FOR 2 STREAMS. TC(MIN) = 14.33 ' SUMMARY RESULTS: END OF STUDY SUMMARY: STREAM CONFLUENCE EFFECTIVE EFFECTIVE AREM ACRES) = 34.81 NUMBER Q(CFS) AREA(ACRES) PEAK RATE( FS) ===== = = = = 49 __________ _______________________________ --------------------------------------------- -FLOW - -- END OF RATIONAL METHOD ANALYSIS 1 86. 31.41 2 80.2' 32.13 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 86.17 TIME(MINUTES) = 14.!80 EFFECTIVE AREA(ACRES) = 31.41 TOTAL AREA(ACRES) = 32.80 ' FLOW PROCESS FPOM NODE 15.00 TO NODE ---- ---- --------- 16.00 IS CODE = 8 ---- ---- ------------------ ------ -------- ----- ----- --------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<(< << 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.437 SOIL CLASSIFICA - ION IS "A'' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm( :NCH /HR) _ .4850 ' SUBAREA AREA(ACRES) = 3.40 SUBAREA RUNOFF(CFS) _ 9.03 EFFECTIVE AREMACRES) = 34.81 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 36.20 ' PEAK FLOW RATE( :FS) = 92.49 TC(MIN) = 14.33 END OF STUDY SUMMARY: TOTAL AREA(ACRES) = 36.20 EFFECTIVE AREM ACRES) = 34.81 ' PEAK RATE( FS) ===== = = = = 49 __________ _______________________________ -FLOW - -- END OF RATIONAL METHOD ANALYSIS * *** * * * * * * * * *xxx * * * * * * * * * *xxx * * * * ** ' *x *xx ** * ** ' RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE (Reference: 1986 SAN BERNARDINO CO. HYDROLOGY CRITERION) Copyrignt 1983,86,87 Advanced Engineering Software (aes) Ver. 4.1C Release Date: 5/11/87 Serial 0 100937 Especially prepared for: J.P. KAPP & ASSOCIATES, INC. * * * * * * * * * * * * * * *x * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * xxx * * * * * * * * * * * *x ** * TRACT NO. 1457' * HYDROLOGY STUDY ' * 25 YEAR STORM FILE NAME: HUNTERS.5 TIME /DATE OF STUDY: 23:17 /17/1990 ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- - - USER - SPECIFIED - HYDROLOGY - AND - HYDRAULIC MODEL - INFORMATION : ---------------- -- *TIME -OF- CONCENTRAT ION MODEL*-- USER SPECIFIED STORM EVENT(YEAR) = 25.00 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCE4T OF GRADIENTS(DECIMAL) TO USE FOR FR'+_C7 :ON SLOPE _ .5 *USER- DEFINED LOGARITHMIC INTERPOLATICN USED FOR RAINFALL* 10 -YEAR STORM e0- MINUTE INTENSITY(INCH /HOUR) = 1.060 100 -YEAR STORM 50- MINUTE INTENSITY(INCH /HOUR) = 1.590 COMPUTED RAINFALL INTENSITY DATA: STORM EVENT = 25.00 1 -HOUR INTENSITY(INCH /HOUR) _ 1 .2461 SLOPE OF INTENSITY DURATION CURVE _ .7000 - - FLOW PROCESS FROM NODE 1.00 TO NODE 2.00 IS CODE _ `' -------------------------- -------------------------------------- >>> > > RATIONAL METHOD INITIAL SUBAREA ANALYSIS <<<<< == NATURAL AVERAGE COVER______________________ _______________________________ TO = K *[(LENGTH ** 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA F LOW - LENGTH = 1000.00 UPSTREAM ELEVATION = 1930.00 DOWNSTREAM ELEVATION = 1815.00 ELEVATION DIFFERENCE = 115.00 TC = .706 *[( 1000.00 ** 3.00)/( 115.00)1 ** .20 = 17.245 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.982 SOIL CLASSIFICATION IS "A'' NATURAL AVERAGE COVER "GRASS" SUBAREA LOSS RATE, Fm(INCH /HR) _ .8200 SUBAREA RUNOFF(CFS) = 7.40 TOTAL AREA(ACRES) = 3.80 PEAK FLOW RATE(CFS) = 7.40 -- FLOW - PROCESS - FROM - NODE - - - -- 2_00 -TO- NODE - - - -- 3_00 -IS- CODE 6 - _--- ------ - - - - -- >>>>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<<<<c ------------------------ UPSTREAM ELEVATION = 1815.00 DOWNSTREAM ELEVATION = 1771.00 STREET LENGTH(FEET) = 500.00 CURB HEIGTH(INCHES) _ S. DISTANCE FROM CROWN TO CROSSFALL GRAD_RPEAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = -2 * *TRAvELTIME COMPUTED USING MEAN FLOW(CFS) 10.1 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .33 HALFSTREET FLOODWIDTH(FEET) = 5.19 AVERAGE FLOW VELOCITY(FEET /SEC.) = 7.38 r- PRODUCT OF DEPTH &VELOCITY = 2.40 STREETFLOW TRAVELTIME(MIN) = 1.13 TC(MIN) = 18,37 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.853 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH/HR) = .582 SUBAREA AREA(ACRES) = 2.70 SUBAREA RUNOFF(CFS) = 5.52 EFFECTIVE AREA(ACRES) = 6.50 AVERAGED Fm(INCH/HR) _ .721 TOTAL AREA(ACRES) = 6.50 PEAK FLOW RATE(CFS) = '2.47 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .36 HALFSTREET FLOODWIDTH(FEET) = 5.94 FLOW VELOCITY(FEET /SEC.) = 7.30 DEPTH *VELOCITY = 2.50 ********************************************* * * ** * * * * * * * * *r* * * * * * * * * * * * ** * ** FLOW PROCESS FROM NODE 3.00 TO NODE 4.00 IS CODE = 6 >> >>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA < <<<< UPSTREAM ELEVATION = 1771.00 DOWNSTREAM ELEVATION = 1736.00 STREET LENGTH(FEET) = 500.00 CURB HEIGTH(INCHES) = 8. STREET HALFWIDTH(FEET) = 18.00 DISTANCE FROM CROWN TO CRCSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET OROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 2 * *TRAvELTIME COMPUTED USING MEAN FLOW(CFS) = 14.89 STREETFLOW MCDEL RESULTS: STREET FLOWDEPTH(FEET) = .39 HALFSTREET FLOODWIDTH(FEET) = 6.69 AVERAGE FLOW VELOCITY(FEET /SEC.) = 7.13 PRODUCT OF DEPTH &VELOCITY = 2.75 STREETFLOW TRAVELTIME(MIN) = 1.17 TC(MIN) = 19.54 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.733 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH/HR) = .5820 SUBAREA AREA(ACRES) = 2.50 SUBAREA RUNOFF(CFS) = 4.84 EFFECTIVE AREA(ACRES) = 9.00 AVERAGED Fm(INCH /HR) = .682 TOTAL AREA(ACRES) = 9.00 PEAK FLOW RATE(CFS) = 16.61 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .40 HALFSTREET FLOODWIDTH(FEET) = 7.06 FLOW VELOCITY(FEET /SEC.) = 7.24 DEPTH *VELOCITY = 2.90 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 4.00 TO NODE 4.00 IS CODE = 1 CONFLUENCE VAL,.E3 USED FOR INDEPENDENT STREAM 1 ARE: TIME CF CONCENTFATION(MINUTES) _ '9.54 RAINFALL INTENSITY (INCH. /HOUR) = 2.73 EFFECTIVE STREAM AREA(ACRES) = 9.00 TOTAL STREAM A= EA(ACRES) = 9.00 PEAK FLOW RATE(CFS) AT CONFLUENCE = 16.61 ***************** x*************************** ** * * *x * * * * * ** * * * * * * * * * ** * * * * * ** FLOW PROCESS FFCM NODE 5.00 TO NODE 6.00 IS CODE = 2 > >>> >RATIONAL METHOD INITIAL SUBAREA ANALYSIS < << << DEVELOPMENT IS SINGLE FAMIL( RESIDENTIAL 3 -4 DWELLIS /ACRE TC = K *[(LENGTHx* 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 600.00 UPSTREAM ELEVATION = 1775.00 DOWNSTREAM ELEVATION = 1756.00 ELEVATION DIFFERENCE = 19.00 TC = .412 *[( 600.00 ** 3.00)/( 19.30)] ** .20 = 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.188 SOIL CLASSIFICA -ION IS "A" RESIDENTIAL -> 3-4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm;I%CH /HR) _ .5820 SUBAREA RUNOFF'CFS) = 11.68 TOTAL AREA(ACRES) = 3.60 PEAK FLOW RATE(CFS) = 11.68 **************** xx*************************** * ** * * * * * * * * *x* * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 6.00 TO NODE 4.00 IS CODE = 6 >> >> >COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA <<<<< UPSTREAM ELEVATION = 1756.00 DOWNSTREAM ELEVATION = 1736.00 STREET LENGTH(FEET) = 600.00 CURB HEIGTH(INCHES) _ 8. STREET HALFWIDTH(FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 1 0.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVEL TIME COMPUTED USING MEAN FLOW(OFS) = 16.01 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) = .56 HALFSTREET FLOODWIDTH(FEET) = 13.94 AVERAGE FLOW VELOCITY(FEET /SEC.) = 5.86 PRODUCT OF DEPTH&VELOCITY = 3.26 STREETFLOW TRAVELTIME(MIN) = 1.71 TC(MIN) = 12.32 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.773 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) = .5820 SUBAREA AREA(ACRES) = 3.00 SUBAREA RUNOFF,(CFS) = 3.62 EFFECTIVE AREA(ACRES) = 6.60 AVERAGED Fm(INCH /HR) = .582 TOTAL AREA(ACRES) = 6.60 PEAK FLOW RATE(CFS) = 18.96 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .58 HALFSTREET FLOODWIDTH(FEET) = 15.19 FLOW VELOCITY(FEET /SEC.) = 6.12 DEPTH *VELOCITY = 3.56 **************** xx************ x************** * * * * * * * * * * * *xx* * * * * * * * * * *x * * * ** %> >/DES IGNATE _'JDEPENDENT SIT :PEAlM FOR DtiFLUENCE'' <<< = AND - CCMPi_ = =_ VAR IOUS _Gt -:F' UEt- �CEu _P_A.M - JAL-i .DES= <:_ ____________________ CONFLUENCE `!A L' ES USED FOR I'iDEPENDEN T STREAM 2 ARE: TIME OF CONCr -! ?:TIO (MINUTES) = 12.22 RAINFALL INTEt•jS =TY (INCH. /HOUR) = 3.77 EFFECTIVE STREAM AREA(ACRES) = 6.60 TOTAL STREAM 4REA(ACRES) = 6.60 PEAK: FLOW RATE(: S) AT CONFLUENCE = 18.96 CONFLUENCE INFCPMATION: STREAM PEAK =_OW TIME INTENSITY FM E= FECTIJE NUMBER RATE(C =S) (MIN.) (IPICH /HOUR) (IN /HR) AREA(ACRES) -------------------------------------------------------------- 1 16.51 19.54 2.733 .68 2 18,36 12.32 3.773 .58 6.t:v CI i 0 F, RAINFALL INTENS - TY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. SUMMARY RESULTS: STREAM CONFLUENCE EFFECTIVE NUMBER 0(CFS) AREA(ACRES) --------------------------------------- - - - - -- 1 29..18 15.60 2 '34.74 12.28 COMPUTED CONFLUENCE ESTIMATES ARE AS FELLOWS: PEAK FLOW RATEi3FS) = 34.,'4 TIME;MINUTES' = 12. 25 EFFECTIVE AREA(� = 12.28 TOTAL AREA(ACRES) = 15.60 FLOW PROCESS FROM NODE 4.00 TO NODE 7.00 IS CODE = 6 ---------------------------------------------------------------------------- >>>> >COMPUTE ST::�EETFLOW TRAVELTIME THRU SUBAREA <<< << UPSTREAM ELEV•AT : - 'N = 1736.00 DOWNSTREAM ELEVATION = 1713.00 STREET LENGTH(FEET) = 600.00 CURB HEIGTH(INC ES) STREET HALFWICTN(FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEEREAK = 10.00 INTERIOR STREE- CROSSFALL(DECIMAL) _ .020 OUTSIDE STREET :ROSSFALL(DECIMAL) = .�40 SPECIFIED NUMBE; OF HALFSTREETS CARRYING RUNOFF = 2 * *TRAVEL -iME COMPUTED USING MEAN FLOW(CPS) _ 4_'.16 STREETFLOW MOLDEL RESULTS: STREET F_OWDEPTH(FEET) _ .59 HALFSTREET FLOODWIDTH(FEET) = 15.81 AVERAGE =LOW VELOCITY(FEET /SEC.i = 6.71 PRODUCT '3F DEPTH &VELOCITY = Z.99 STREETFLOW TRAVELTIME(MIN) = 1.49 7 1(MIN) = 13.81 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.483 SOIL CLASSIFICATION IS "A" RESIDENTIAL -> 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, FmtINCH /HR) _ .5820 SUBAREA AREA(ACRES) = 7.20 SUBAREA RUNOFF(C =S) = 18.80 EFFECTIVE AREA(,% -CRES) = 19.48 AVERAGED Fm(INCH/HR) _ .611 TOTAL AREA(ACRES) = 22.80 PEAK FLOW RATE(CFS) = 50.34 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .62 HALFSTREET FLOODWIDTH(FEET) = 17.06 FLOW'VELOCITY(FEET /SEC.) = 6.80 DEPTH *VELOCITY• = 4.?1 FLOW PROCESS XzOM NODE 7.00 TO NODE 8.00 IS COD- 3 >> >> ;COMPUTE TITEFLOW TRAVELTIME THRU SJBAREA<<<<' - - >>>>> USING - COMPUTER-ESTIMATED - PIPESIZ_ - _1ON _PRESSURE FL_6)< < <_ < ----- - - - - -- DEPTH OF FLOW !N 36.0 INCH PIPE IS 25.5 INCHES PIPEFLOW VELOCITY(FEET/SEC.; = 9.4 UPSTREAM NODE EnEVATION = 1713.00 DOWNSTREAM NODE E LEVATION = 1708.00 FLOWLENGTH(FEET, = 600.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 50.34 TRAVEL TIME(MIK.) = 1.06 TC(MIN.; = 14.88 FLOW PROCESS FPO" NODE 8.00 TO NODE 8.00 IS CODE = 8 -------------------------------------------------------------------- >>>>>ADDITION C= SUBAREA TO MAINLINE PEAK FLOW<<< << ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.308 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 3 -4 DWELLINGS /ACRE SUBAREA. LOSS RATE, Fm(I':CH /HR) _ .5820 SUBAREA AREA(ACRES) = 2.00 SUBAREA. RUNOFF(CFS) EFFECTIVE AREA( ?CRES) = 21.48 = 4.91 AVERAGED Fm(INCH /HR) _ .509 TOTAL AREA(ACRES) = 24.80 PEAK FLOW RATE(CFS) = 52.17 TC(MIN) = 14.=8. FLOW PROCESS FP5M NODE 8.00 TO NODE 8.00 IS CODE = 8 ---------------------------------------------------------------------------- > > > > >ADDITIO d :,F SUBAREA TO MAINLINE PEAK FLOW< < < < < 25 YEAR RAINF?LL INTENSITY(INCH /HOUR) = 3.308 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 3 -4 DWELLINGS/ACRE SUBAREA LOSS RATE, 0v Fm(:NCH /HR) _ .20 SUBAREA AREA(ACRES) = 2.S0 SUBAREA RUNOFF(CFS) = 6.13 EFFECTIVE AREV ACRES) = 23.98 AVERAGED Fm(INCH /HR) _ .606 TOTAL AREA(ACRES) = 27.30 PEAK FLOW RATE(CFS) = 58.30 TC(MIN) = 14.E8 END OF STUDY SUMMARY: TOTAL AREA(ACRES) _ 27.30 EFFECTIVE ARE& ACRES) = 23.98 PEAK FLOW RATE(CFS) _ 58.30 END OF RATIONAL METHOD ANALYSIS --------------- - - - - -- A ' RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PrCKAGE (Reference: 1986 SAN BERNARDINO CO. HYDROLOGY CRITERION) Copyrignt 1983,86,87 Advanced Engineering Software (aes) Ver. 4.1C Release Date: 5 /11/87 Serial # :00937 Especially prepared for: J.P. KAPP & ASSOCIATES, INO. DESCRIPTION OF STUDY * TRACT NO. 14572 * HYDROLOGY STUD' * 25 YEAR STORM FILE NAME: HUN7ERS.6 TIME /DATE OF STUDY: 1:42 5/18/1990 ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- USER SPECIFIED - HYDROLOGY - AND - HYDRAULIC - MODEL - INFORMATION: ----------- - - - - -- -- *TIME -OF- CONCENTRATION MODEL * -- USER SPECIFIED FORM EVENT(YEAR) = 25.00 SPECIFIED MINP'IUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE _ .95 *USER - DEFINED LOGARITHMIC INTERPOLATION USED FOR RAINFALL* 10 -YEAR STORM 60- MINUTE INTENSITY(INCH /HOUR) = 1.060 100 -YEAR STORM 60- MINUTE INTENSITY(INCH /HOUR) = 1.59G COMPUTED RAINFALL INTENSITY DATA: STORM EVENT = 25.00 1 -HOUR INTENSITY(INCH/HOUR) _ i.2461 SLOPE OF INTENSITY DURATION CURVE _ .7000 FLOW PROCESS FROM NODE 1.00 TO NODE 2.00 IS CODE = 2 >>> > >RATIONAL METHOD INITIAL SUBAREA ANALYSIS <<< << -------------------------------- DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE TC = K *[(LENGTH ** 3.00 W ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW - LENGTH = 680.00 UPSTREAM ELEVATION = 1710.00 DOWNSTREAM ELEVATION = 1687.00 ELEVATION DIFFERENCE = 23.00 TC = .389 *[( 680.00 ** 3.00)/( 23.00)] ** .20 = 10.402 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.249 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, FmiINCH /HR) _ .4850 SUBAREA RUNOFF(CFS) = 9.82 TOTAL AREA(ACRES) = 2.90 PEAK FLOW RATE(CFS) = 9.82 ************************************** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 2.00 TO NODE 3.00 IS CODE = 6 ---------- ----------- ----- ------------- ---------------------- >>>>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<<<<< UPSTREAM ELEVATION = 1687.00 DOWNSTREAM ELEVATION = 1661.00 STREET LENGTH(FEET) = 380.00 CURB HEIGTH(INCHES) = S. DISTANCE FROM OPO'WN TO CROSSFALL GRADEEPEAK INTERIOR STREET !ROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBED OF HALFSTREETS CARRYIKG RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) _ x.75 STREETFLOW MODEL RESULTS: STREET = LOWDEPTH(FEET) _ .49 HALFSTREET FLOODWIDTH(FEET) = 10.81 AVERAGE =LOW VELOCITY(FEET /SEC.) = 8.04 PRODUCT OF DEPTH &VELOCITY = S.98 STREETFLOW TRAVE_TIME(MIN) = .79 TC(MIN) = 11.19 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.037 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -; 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(I',CH /HR) _ .=850 SUBAREA AREA(ACRES) = 3.70 SUBAREA RUNOFF(CFS) _ 1 1.83 EFFECTIVE AREA(ACRES) = 6.60 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 6.60 PEAK FLOW RATE(CFS) = 21.10 END OF SUBARE? STREETFLOW HYDRAULICS: DEPTH(FEET) = .54 HALFSTREET FLOODWIDTH(FEET) = 13.11 FLOW VELOCITY(FEET /SEC.) = 8.24 DEPTH *VELCCITY = 4.48 FLOW PROCESS FROM NODE 3.00 TO NODE 3.00 IS CODE = 8 -------------------------------------------------------------------- > >> >>ADDITION OP SUBAREA TO MAINLINE PEAK FLOW<<< << 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.037 e SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> S -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(:4CH /HR) _ .4850 SUBAREA AREA(ACRES) = 1.80 SUBAREA RUNOFF(CFS) = 5.75 EFFECTIVE AREA(ACRES) = 8.40 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 8.40 PEAK FLOW RATE;CFS) = 26.85 TC(MIN) = 11.19 FLOW PROCESS FROM NODE 3.00 TO NODE 5.00 IS CODE 3 ---------------------------------------------------------------------------- > >>>> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< >> >>> USING COMPUTER- ESTIMATED PIPESIZE (NON- PRESSURE FLCN)<<< << --------------- DEPTH OF FLOW Ii 24.0 INCH PIPE IS 16.1 INCHES PIPEFLOW VELOCI- Y(FEET /SEC.) = 12.0 UPSTREAM NODE ELEVATION = 1661.00 DOWNSTREAM NODE ELEVATION = 1656.00 FLOWLENGTH(FEET) = 210.00 MANNINGS J = .013 ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 26.85 TRAVEL TIME(MIN.) = .29 TC(MIN.) = 11.48 - - FLOW PROCESS FROM NODE 5.00 TO NODE 5.00 IS CODE = 8 > » >>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<< << 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.965 SUBAREA AREA(AC =ES) = 2.30 SUBAREA RUNOFF(CFS) = 7.20 EFFECTIVE AREA`ICRES) = 10.70 AVERAGED Fm(!"CH /HR) _ .485 TOTAL AREA(ACRES; = 10.70 PEAK FLOW RATEVFS) = 33.51 TC(MIN) = 11.48 FLOW PROCESS FROM NODE 5.00 TO NODE 5.00 IS CODE = 8 ---------------------------------------------------------------------------- >>>> >ADDITION OF SUBAREA TO MAINLINE PEAK FLOW< <<<< 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.965 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREA(ACRES) = 2.10 SUBAREA RUNOFF(CFS) = 6.58 EFFECTIVE AREA(ACRES) = 12.80 ' AVERAGED Fm(IJCH /HR) _ .485 TOTAL AREA(ACRES) = 12.80 PEAK FLOW RATE(CFS) = 40.09 TC(MIN) = 11.48 - - FLOW PROCESS FROM NODE 5.00 TO NODE 6.00 TS CODE 3 >>> >> COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< -- > > >> >USING COMPUTER- ESTIMATED PIPESIZE (NON - PRESSURE FLCrW <<< DEPTH OF FLOW :N 24.0 INCH PIPE IS 16.4 INCHES PIPEFLOW VELOCI7A FEET /SEC.) = 17.5 UPSTREAM NODE = _EVATION = 1656.00 DOWNSTREAM NODE ELEVATION = 1643.00 FLOWLENGTH(FEET ) = 260.00 MANNINGS N = .013 ESTIMATED PIPE :IAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 40.09 TRAVEL TIME(Mik.) _ .25 TC(MIN.) = 11.73 -- FLOW - PROCESS - FROM - NODE - - - -- 6_00 - TO - NODE 8 - -- 6.00 is CODE = > > >>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<< ---------------------------------------------------------------------------- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.906 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .4850 SUBAREA AREM ACRES) = 1.90 SUBAREA RUNOFF(CFS) = 5.85 EFFECTIVE AREA(ACRES) = 14.70 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 14.70 PEAK FLOW RATE;CFS) = 45.26 TC(MIN) = 11.73 FLOW PROCESS FROM NODE 6.00 TO NODE 6.00 IS CODE = 8 ------------------------------------------------------------ »> > >ADDITION CF SUBAREA TO MAINLINE PEAK FLOW<<<<< 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.906 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> E -7 DWELLINGS /ACRE SUBAREA LOSS RATE. Fm(INCH /HR) _ .4850 AVERAGED Fm(IKCH /HR) _ .485 TOTAL AREA(ACPES) = 17.20 PEAK FLOW RATE CFS) = 52.96 TC(MIN) _ 11.7.. FLOW PROCESS FPCM NODE 6.00 TO NODE 7.00 IS CODE = 3 ------------------------------------------------------------ >> > >>COMPUTE PIPEFLOW - TRAVELTIME THRU SUBAREA << <!< >>> >>USING COMPUTER- ESTIMATED PIPESIZE (NON- PRESSURE FLC'N)<<<<< DEPTH OF FLOW :N 33.0 INCH PIPE IS 22.2 INCHES PIPEFLOW VELOCI- Y(FEET /SEC.) = 12.4 UPSTREAM NODE ELEVATION = 1643.00 - DOWNSTREAM NODE ELEVATION = 1641.00 FLOWLENGTH(FEET, = 120.00 MANNINGS N .01' ESTIMATED PIPE DIAMETER(INCH) = 33.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 52.96 TRAVEL TIME(MIN.) _ .16 TC(MIN.) = 11.89 FLOW PROCESS FROM NODE 7.00 TO NODE 7.00 IS CODE = 1 ---------------------------------------------------------------------------- - - > > >>> DESIGNATE _NDEPENDENT STREAM - FOR :,ONFLUENCE <<<<< ---------------------------------------------------------------------------- CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTPATION(MINUTES) = 11.89 RAINFALL INTENSITY (INCH. /HOUR) _ 3.87 EFFECTIVE STREAM AREA(ACRES) = 17.20 TOTAL STREAM AREA(ACRES) = 17.20 PEAK FLOW RATE(CFS) AT CONFLUENCE = 52.96 FLOW PROCESS FPOM NODE 8.00 TO NODE 9.00 IS CODE = 2 --------------------------------------------------------------- ' -- >>>>>RATIONAL - METHOD - INITIAL - SUBAREA - ANALYSIS << <<<------------------ - - - - -- DEVELOPMENT IS SINGLE FAMIL'i RESIDENTIAL -> 5 -7 DWELLINGS /ACRE TC = K *[(LENGTH** 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 1701.00 DOWNSTREAM ELEVATION = 1655.00 ELEVATION DIFFERENCE = 46.00 TC = .389 *[( ':000.00 ** 3.00)/( 46.00)] ** .20 = 11.413 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.982 - SOIL CLASSIFICATION IS "A'' RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) - .4850 SUBAREA RUNOFF(CFS) = 9.76 TOTAL AREA(ACRES) = 3.10 PEAK FLOW RATE(CFS) = 9.76 FLOW PROCESS FROM NODE 9.00 TO NODE 7.00 IS COCE = 6 ------------------------------------------------------------ >>>>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA << <<< UPSTREAM ELEVATION = 1655.00 DOWNSTREAM ELEVATION = 1641.00 STREET LENGTH(FEET) = 900.00 CURB HEIGTH(INCHES) _ STREET HALFWIDTH(FEET) = 18.00 OUTSIDE STREET :ROSSFALL(DECIMAL) SPECIFIED HUMBE? OF HALFSTREETS CARRYING RUNOFF = 1 **TRAVEL - IME COMPUTED USING MEAN FLOW(CFS) _ "1.31 STREETFLOW ^OCEL RESULTS: STREET F_OWDEPTH(FEET) _ .58 HALFSTPEET FLOODWIDTH(FEET) _ '5.19 AVERAGE =LOW VELOCITY(FEET /SEC.) = 4.30 PRODUCT OF DEPTH &VELOCITY = 2.50 STREETFLOW TRAVELTIME(MIN) = 3.49 TC'MIN) = 14.90 25 YEAR RAINF ?LL INTENSITY(INCH /HOUR) = 3.303 SOIL CLASSIFICATION IS "A'' RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm( :4CH /HR) _ .4850 SUBAREA AREA(ACRES) = 2.80 SUBAREA RUNOFF(CFS) = 7.10 EFFECTIVE AREA {ACRES) = 5.90 AVERAGED Fm(INCH /HR) _ .485 TOTAL AREA(ACRES) = 5.90 PEAK FLOW RATE(CFS) _ 14.97 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) _ .51 HALFSTREET FLOODWIDTH(FEET) = 16.4= FLOW VELOCITY(FEET /SEC.) = 4.29 DEPTH *VELOCITY = 2.50 FLOW PROCESS FROM NODE - - - -- 7_00 -TO- NODE - - - -- 7_00 -IS COCE = 1 > > > >>DESIGNATE : NDEPENDENT STREAM FOR CCNFLUENCE<<<<< CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MINUTES) = 14.90 ' RAINFALL INTENSITY (INCH./HOUR) = 3.30 EFFECTIVE STREAM AREA(ACRES) = 5.90 TOTAL STREAM AREA(ACRES) = 5.90 PEAK FLOW RATE:CFS) AT CONFLUENCE = 14.97 FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS COLE = 2 ----------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS< <<<< DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 5 -7 DWELLINGS /ACRE TC = K *[(LENGTH ** 3.00) /(ELEVATION CHANGE)] ** .20 ' INITIAL SUBAREA FLOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 1698.00 DOWNSTREAM ELEVATION = 1651.50 ELEVATION DIFFERENCE = 46.50 TC = .389 *f( 1000.00 ** 3.00)/( 46.50)] ** .20 = 11.388 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.988 SOIL CLASSIFICATION IS "A'' RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, Fmk :ICH /HR) _ .4850 SUBAREA RUNOFF(CFS) = 7.38 TOTAL AREA(ACRES) = 2.50 PEAK FLOW RATE(CFS) = 7.88 FLOW PROCESS FROM NODE 11.00 TO NODE 7.00 IS CCDE = 6 ---------- ----------- ----- ------------- ---------------------- >>>>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA <<<<< ---------------------------------------------- UPSTREAM ELEVATION = 1651.50 DOWNSTREAM ELEVATION = 1641.00 STREET LENGTH(FEET) = 650.00 CURB HEIGTH(INCHES) _ �. DISTANCE FROX 1 TO CROSSFALL aRADE ±EEAr. INTERIOR STREE :ROSSFALL(DECIMAL) = .020 JUTSIDE STREE- CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYIWG RUNOFF = 1 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS) _ 10.40 STREETFLOW MODEL RESULTS: STREET FLOWDEPTH(FEET) _ .54 HALFSTREET FLOODWIDTH(FEET) = 13.31 AVERAGE FLOW VELOCITY(FEET /SEC., = 4.06 PRODUCT OF DEPTH &VELOCIT`( = 2.21 STREETFLOW TRAVELTIME(MIN) = 2.67 TC(MIN) = 14.06 25 YEAR RAINFALL INTENSITY(INCH /HOUR.) = 3.441 SOIL CLASSIFICATION IS "A'' RESIDENTIAL - > 5 -7 DWELLINGS /ACRE SUBAREA LOSS RATE, FmQACH /HR) _ .4850 SUBAREA AREA(ACRES) = 1.90 SUBAREA RUNOFF(CFS) = 5.06 EFFECTIVE AREA(ACRES) = 4.40 AVERAGED Fm(IJCH /HR) _ .485 TOTAL AREA(ACRES) = 4.40 PEAK FLCrJ RATE(CFS) = 1.71 ' END OF SUBAREA STREETFLOW HYDRAULICS: - DEPTH(FEET) = .56 HALFSTREET FLOODWIDTH(FEET') = 13.9= FLOW VELOCITY�_FEET /SEC.) = 4.29 DEPTH *VELOCITY 2.39 FLOW PROCESS FROM NODE 7.00 TO NODE 7.00 IS CODE = 1 >> > >>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES <<< << CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 3 ARE TIME OF CONCENTRATION(MINUTES) = 14.06 RAINFALL INTENSITY (INCH. /HOUR) = 3.44 EFFECTIVE STREAM AREA(ACRES) = 4.40 TOTAL STREAM AREA(ACRES) = 4.40 PEAK FLOW RATE(CFS) AT CONFLUENCE = 11.71 CONFLUENCE INFORMATION: STREAM PEAK =LOW TIME INTENSITY FM EFFECTIVE NUMBER RATE(CFS) (MIN.) (INCH /HOUR) (IN /HR) AREA(ACR ------------------------------------------- 1 52.96 11.89 3.369 .48 17.2 2 14.97 14.90 3.303 .49 5.03 ' 3 11.71 14.06 3.441 .49 4. =0 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 3 STREAMS. SUMMARY RESULTS: STREAM CONFLUENCE EFFECTIVE NUMBER Q(CFS) AREA(ACRES) ---- 78.6-3 ------------ 25.6-3 --------------- 2 70.23 27.50 3 72.78 27.16 - COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 78.63 TIME(MINUTES) - 11.890 EFFECTIVE AREA(ACRES) = 25.63 -- TOTAL - AREA( ACRES)======= 27. 50______________ _______________________________ END OF STUDY SUMMARY: TOTAL AREA(ACRES) 27.50 EFFECTIVE AREA(ACRES) = 25.63 END OF RATIONAL 'AETHCD ANAL IS 1 6 1 1 C 1 � u * �K* �c�lc�fc�fc�lc�c** x* �xxxzz* �c* �c�c* �* �* ���! c7KKKk*** �cxxMx�K�*** KZ�c�cK * *xxzz�c *�t�c�K�!c�K��xxxxx *K 1 RATv_:��AL METHOD HYGROLCIa( ., ,�?PUTER PR OGRAM , - - -r,uE ;RefeY_re: 1926 SAN BERNARDI'4O CO. HYDROLOGY - ERION) Copyri nt 1983,36,37 Advanced Engineer - ing Scrt:raf (aes) der. 4.1C Release Date: 5j :1;'87 Ser"al # I- - -937 `specially prepared for: J.P. KAPP 1 ASSO :iATES, INC. DESCRIP T ION STUDY *x *�c c�c�cxxxx�c�c * *�IC�c *�Kx xx�cxx * TRACT NO. 1457 x HYDROLOGY STUDY * 25 YEAR STORM x * �Ic�Ic�k�c�K�K�I c�K�c�k�c�K�lc�cxx�c�c* �K* �k�Ic�ic�icx�k�K�Ic�c�ic�c�c�Kx�c�c�x* �c��fc�ic�c�c�xrc* �ic�K * *xxxx *�cK *�c * * * * *�c *xx�r. FILE NAME: HUNT =RS.7 TIME /GATE OF S -UDY: 1:29 5/21/1990 ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- -- USER - SPECIFIED - _YDROLOGY AND HYDRAULIC MODEL 1NFOP,MATIC-- - - - - -- - - -- -- xTI'AE- OF- CONCENTP.ATION MCDEL * -- USER SPECIFIED STORM EVENT(YEAR) _ .25.00 SPECIFIED MINIMUM PIPE SIZE(INCH) 18.00 SPECIFIED PER- ---NIT OF GRADIENTS(DECIMAL, TO USE PCR FRI . - =St•i SLOPE _ .95 *USER - DEFINED LOGARITHMIC INTERPOLATION USED FOR RAINFY__x 10 -YEAR STORM 60'- MINUTE INTENSITY(INCH /HOUR) 1.060 100 -YEAR STORK �0- MINUTE INTENSIT((INCn %HGUR;! i.5 COMPUTED RAINP4L'- INTENSITY DATA: STORM EVENT 25.00 1 INTENSIT': ( INCH %HUR i = 1 . - m-161 SLOPE OF INTEPdSI ?Y DURATION CURVE FLOW PROCESS FCM NODE 1.00 TO NODE 2.00 IS COQ= 2 ---------------------------------------------------------------------------- >>>>>RATIONAL t•IETHOD INITIAL SUBAREA 4NALYSIS<<<<< ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- NATURAL AVERAGE COVER TC = K *[(LENGTHx* 3.00)/(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA FLOW - LENGTH = 540.00 UPSTREAM ELEVATION = 1955.00 DOWNSTREAM ELEVATION = 1875.00 ELEVATION DIFFERENCE = 80.00 TC = .706 *[( - 40.00 ** 3.00)/( 80.0)] ** .20 '2.c'2 25 YEAR RAINFALL INTENSITY(INCH /HOUR) 3.672 SOIL CLASSIFICATION IS "A" NATURAL AVERAGE COVER "GRASS" SUBAREA LOSS RATE, FM(INC- HR) _ .8200 SUBAREA RUNOFF(OFS) 23.62 TOTAL AREA(ACRES) = 9.20 PEAK FLOW RAT_E(C =S) 23.62 FLOW PROCESS F" NODE 2.00 TO NODE 3.00 IS CODE 5 --------------- --------------------------- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - >>> > >C0MPUTE TRAPEZOIDAL- CHANNEL >> > >>TRAVELTIME THRU SUBAREA<<<<< -------------- UPSTREAM NODE ELEVATION 1875.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREE- CROSSFALL(DECIMAL) = .040 SPECIFIED NUMSE? OF HALFSTREETS CARRYING RUNOFF = 2 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS; STREETFLOW MCDEL RESULTS: STREET FLOWDEPTH(FEET) _ .61 HALFSTREET FLOODWIDTH(FEET) = 16.44 AVERAGE FLOW VELOCITY(FEET /SEC.) = 7.25 PRODUCT OF DEPTH &VELOCITY = 4.40 STREETFLOW TRAVELTIME(MIN) = 2. TC(MIN) 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.379 SOIL CLASSIFICATION IS "A" RESIDENTIAL 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fmi= 'NCH /HR) _ .5820 SUBAREA AREA(ACRES) = 6.90 SUBAREA P.UNOFF(CFS) _ '4.26 EFFECTIVE AREA(ACRES) = 27.60 AVERAGED Fm(INCH /HR) _ .760 TOTAL AREA(ACRES) = 27.60 PEAK FLOW RATE(CFS) = 52.61 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .62 HALFSTREET FLOOD'WIDTH(FEET) FLOW VELOCITY(FEET /SEC.) = 7.11 DEPTH *VELOCITY = =0 FLOW PROCESS FROM NODE 5.00 TO NODE 5.00 IS CODE = 1 >> > >>DESIGNATc INDEPENDENT STREAM FOR CONFLUENCE < << pq L CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: r r.,1r nr /. /'�.1/'. �•IT� 1 TT n.1,1 / 11'k11 I- ' - n . FLOW PROCESS FROM NODE T CODE 8 3.00 TO NOD= 3 1S CODE - >> > > >ADDITION OF SUBAREA MAIANIt1GS FACT::: = CHANNEL FLOW - � =J 035 'lAAIMUM SUBAREA(CFS) = DEPT FEET, = 2.00 2 2 /HOUR) = 3.155 FLOW VELOCIT(' ^ = =T /SEC) = 3.G1 FLOW DEPTH(FEET) _ .08 TRAVEL TIME(MIi4.) = 3.10 TC(MIN.i = 15.91 SUBAREA AREA(nCP.ES) = 11.50 SUBAREIy RUNOFF(CFS) _ 24.17 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREE- CROSSFALL(DECIMAL) = .040 SPECIFIED NUMSE? OF HALFSTREETS CARRYING RUNOFF = 2 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS; STREETFLOW MCDEL RESULTS: STREET FLOWDEPTH(FEET) _ .61 HALFSTREET FLOODWIDTH(FEET) = 16.44 AVERAGE FLOW VELOCITY(FEET /SEC.) = 7.25 PRODUCT OF DEPTH &VELOCITY = 4.40 STREETFLOW TRAVELTIME(MIN) = 2. TC(MIN) 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.379 SOIL CLASSIFICATION IS "A" RESIDENTIAL 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fmi= 'NCH /HR) _ .5820 SUBAREA AREA(ACRES) = 6.90 SUBAREA P.UNOFF(CFS) _ '4.26 EFFECTIVE AREA(ACRES) = 27.60 AVERAGED Fm(INCH /HR) _ .760 TOTAL AREA(ACRES) = 27.60 PEAK FLOW RATE(CFS) = 52.61 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .62 HALFSTREET FLOOD'WIDTH(FEET) FLOW VELOCITY(FEET /SEC.) = 7.11 DEPTH *VELOCITY = =0 FLOW PROCESS FROM NODE 5.00 TO NODE 5.00 IS CODE = 1 >> > >>DESIGNATc INDEPENDENT STREAM FOR CONFLUENCE < << pq L CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: r r.,1r nr /. /'�.1/'. �•IT� 1 TT n.1,1 / 11'k11 I- ' - n . FLOW PROCESS FROM NODE T CODE 8 3.00 TO NOD= 3 1S CODE - >> > > >ADDITION OF SUBAREA TO MAINLINE PEAK FLOW << "<< ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.155 SOIL CLASSIFICATION IS "A" NATURAL AVERAGE COVER 'GRASS" SUBAREA LOSS RATE, Fm(IN:; - /HR) _ .8200 SUBAREA AREA(nCP.ES) = 11.50 SUBAREIy RUNOFF(CFS) _ 24.17 EFFECTIVE AREA(r.CRES) = 20.70 AVERAGED Fm(I'JCH /HR) _ .820 TOTAL AREA(ACRES) = 20.7' PEAK FLOW RATE(CFS) = 43.51 TC(MIN) = 15.91 FLOW PROCESS =RCM NODE 3.00 TO NODE 5.00 IS CO = 6 ---------------------------------- TRAVELTIME THRU SUBAREA: <<<< >> >> >COMPUTE STREETFLOW ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- UPSTREAM ELEVATION = 1789.00 DOWNSTPEAM ELEVATION = 1748.00 L STREET LENGTH(FEET) = 970.00 CURB HEIGTH(INCHES) STREET HALFWIDTH(FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREE- CROSSFALL(DECIMAL) = .040 SPECIFIED NUMSE? OF HALFSTREETS CARRYING RUNOFF = 2 * *TRAVELTIME COMPUTED USING MEAN FLOW(CFS; STREETFLOW MCDEL RESULTS: STREET FLOWDEPTH(FEET) _ .61 HALFSTREET FLOODWIDTH(FEET) = 16.44 AVERAGE FLOW VELOCITY(FEET /SEC.) = 7.25 PRODUCT OF DEPTH &VELOCITY = 4.40 STREETFLOW TRAVELTIME(MIN) = 2. TC(MIN) 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 2.379 SOIL CLASSIFICATION IS "A" RESIDENTIAL 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fmi= 'NCH /HR) _ .5820 SUBAREA AREA(ACRES) = 6.90 SUBAREA P.UNOFF(CFS) _ '4.26 EFFECTIVE AREA(ACRES) = 27.60 AVERAGED Fm(INCH /HR) _ .760 TOTAL AREA(ACRES) = 27.60 PEAK FLOW RATE(CFS) = 52.61 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .62 HALFSTREET FLOOD'WIDTH(FEET) FLOW VELOCITY(FEET /SEC.) = 7.11 DEPTH *VELOCITY = =0 FLOW PROCESS FROM NODE 5.00 TO NODE 5.00 IS CODE = 1 >> > >>DESIGNATc INDEPENDENT STREAM FOR CONFLUENCE < << pq L CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: r r.,1r nr /. /'�.1/'. �•IT� 1 TT n.1,1 / 11'k11 I- ' - n . ' G ! - r'C'...i 1'JC JIrtCr•i HrtCH \H�.t"CJ/ - " �lV TOTAL STREAM AREA(ACRES) = 27.60 PEAK FLOW RAT_ : AT CONFLUENCE _ 52.61 FLOW PROCESS FPGM NODE 6.00 TO NODE 7.00 IS CCDE 2 ---------------------------------------------------------------------------- > >>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS " <l< NATURAL POOR COVER TC = K *[(LENGT4** 3.00) /(ELEVATION CHANGE)1 ** .20 INITIAL SUBAREA FLOW - LENGTH = 1000.00 UPSTREAM ELEVATION = 1950.00 DOWNSTREAM ELEVATION = 1838.00 ELEVATION DIFFE=RENCE = 112.00 TC = .525 *[( 1000.00 ** 3.00)/( 112.00)1 ** .20 = 12. =32 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.656 SOIL CLASSIFICATION IS "A" NATURAL POOR CCV'ER "BARREN" SUBAREA LOSS RATE, ,=m( INCH /-= ) _ .4100 SUBAREA RUNOFFOCFS) = 24.83 TOTAL AREA(ACRES) = 8.50 PEAK FLOW RATE(CFS) = 24.83 FLOW PROCESS FROM NODE 7.00 TO NODE 8.00 IS CODE = 5 ---------------------------------------------------------------------------- >>>>>COMPUTE TR=APEZOIDAL- CHANNEL FLOW < <<<< > > >>>TRAVELTIME THRU SUBAREA<<<<< ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- UPSTREAM NODE = _EVATION = 1838.00 DOWNSTREAM NODE ELEVATION = 1810.00 CHANNEL LENGTH "HRU SUBAREA(FEET) = 220.00 CHANNEL BASE(FEET) = 100.00 "Z" FACTOR = 5.000 MANNINGS FACTOR = .035 KAXIMUM DEP- H(FEET) = 2.00 CHANNEL FLOW THRU SUBAREA(CFS) = 24.83 FLOW VELOCITY(F =ET /SEC) = 3.17 FLOW DEPTH(FEET) _ .08 TRAVEL TIME(MIN. ) = 1 . 16 TC(MIN. ) = 14.05 FLOW PROCESS FROM NODE 8.00 TO NODE 3.00 1S HOD= a ------ -------- ----- ----- --------- ---- ---- --------- ---- ---- ------------------ >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<< 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.443 - SOIL CLASSIFICATION IS "A" NATURAL POOR COVER "BARREN" SUBAREA LOSS RATE, Fm(INCH /==) _ .4100 SUBAREA AREA(ACRES) = 2.50 SUBAREA RUNOFF(CFS) = 3.82 EFFECTIVE AREA(ACRES) = 11.00 AVERAGED Fm(INCH /HR) _ .410 TOTAL AREA(ACRES) = 11.00 PEAK FLOW RATECOFS) = 30.02 TC(MIN) = 14.0 FLOW PROCESS FROM NODE 8.00 TO NODE 9.00 IS CODE = 6 ---------- ----------- ----- ------------- ---------------------- >>>>>COMPUTE STREETFLOW TRAVELTIME THRU SUBAREA<<<<<. ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- UPSTREAM ELEVATION = 1812.00 DOWNSTREAM ELEVATION = 1758.00 STREET LENGTH(F EET) = 900.00 CURB HEIGTH(INCHES) _ 1. Di5 i ANC FROM &SWN TO GR SSFALL GRALEEREAK = 1 0.00 INTERIOR STREET CROSSFALL(DECIVAL) _ .02C OUTSIDE STREET !POSSFALL' DECIMAL) _ .040 SPECIFIED NUMBEz OF HALFSTREETS CARRY14G RUNOFF = 2 * *TRAVEL COMPUTED USING MEAN FLOW(CF3) _ li.96 STREETFLOW MODEL RESULTS: STREET PLOWDEPTH(FEET) _ .53 HALFSTREET FLOODWIDTH(FEET) = 12.69 AVERAGE FLOW VELOCITY(FEET /SEC.; = 7.7.0 PRODUCT OF DEPTH &VELOCITY = 4.10 STREETFLOW TRA'vELTIME(MIN) = 1.95 - C(MIN) = 16.00 25 YEAR RAINFALL INTENSITY(INCH /HOOP) = 3.144 - - SOIL CLASSIFICA -ION IS "A'' RESIDENTIAL 3- DWELLINGS/ACRE SUBA "EA LOSS RATE, Fmi_,CH /HR) - .5820 SUBAREA AREA VORES) = 6.00 SUBAREA. RUNOFF(CFS) _ 1 3.83 EFFECTIVE AREAfACRES) = 17.00 AVERAGED Fm(INCH /HR) _ .471 TOTAL AREA(ACRES; = 17.00 PEAK FLOW RATE(CFS) _ =5.89 END OF SUBAREA STREETFLOW HYDRAULICS: DIEPTH(FEET) _ .54 HALFSTREET FLOODWIDTH(FEET) = 13.11 FLOW VELOCITY FEET /SEC.) = 7.98 DEPTH *VELOCIT� = 4. FLOW PROCESS FROM NODE 9.00 TO NODE 5.00 IS CODE = 3 > >>> >CCMPUTE AIR -FLOW TRAVELTIME THRU SUBAREA<<<<< > >>>>USING CCMPITER- ESTIMATED PIPESIZE (NON- PRESSURE FL:n)< < <<< -------- - - - - -- ------------------------------------- DEPTH OF FLOW _4 24.0 INCH PIPE IS 13.3 INCHES PIPEFLOW VEL'CC: Y(FEET /SEC.) = 15.9 UPSTREAM NODE EVATION = 1753.00 DOWNSTREAM NODE ELEVATION = 1748.00 FLOWLENGTH(FEE -i = 250.00 MANNINGS N = .013 ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPEFLOWW THRU SoBAREA(CFS) = 40.89 TRAVEL TIME(MIN. ; _ .26 TC(MIN. , = 16.26 FLOW PROCESS =RCM NODE 5.00 TO NCCE 5.00 :S CODE = 1 ---------------------------------------------------------------------------- >> > >>DESIGNATE = NDEPENDENT STREAM FOR CONFLUENCE. << << - - >> > >> AND - COMPUTE - VARIOUS - CONFLUENCED STREAM - VALUES< < < < < ------------- - - - - -- CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MINUTES) = 16.25 RAINFALL INTENSITY (INCH. /HOUR) = 3.11 EFFECTIVE STREAM AREA(ACRES) = 17.00 TOTAL STREAM AREA(ACRES) = 17.00 PEAK FLOW RATE(CFS) AT CCNFLUENCE = 40.89 CONFLUENCE INFORMATION: STREAM PEAK FLOW TIME INTENSITY FM EFFECTIVE NUMBER RATEWS) (MIN.) (INCH /HOUR) (IN /HR) AREA(ACRES) -------------------------------------------------------------- 1 52.61 18.14 2.879 .76 27.6- 2 40.39 16.26 3.108 .47 17.CD RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - --------------- V 9 . 2 93. 1 41 . 74 COMPUTED CONFLOEACE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE12FS) = 93.16 TIME(MINUTES; = 16.1:,9 _ EFFECTIVE AREQXCRES) U1.74 TOTAL AREA(ACRES) = 44.60 FLOW PROCESS FFCM NODE 5.00 TO NODE 10.00 IS COD= = 3 > > >>>COMPUTE PI ;EFLOW TRAVELTIME THRU SUBAREA<<U < > >> >>USING COMPITER- ESTIMATED PIPESIZE (NON- PRESSURE FLONW < << ------------------------------------------------- DEPTH OF FLOW 14 27.0 INCH PIPE IS 21.3 INCHES PIPEFLOW VELOCI Y(FEET /SEC.) = 27.0 UPSTREAM NODE ELEVATION = 1748.00 DOWNSTREAM NODE ELEVATION = 1715.00 FLOWLENGTH(FEET = 340.00 MANNINGS N _ .013 ESTIMATED PIPE :IAMETER(INCH) = 27.00 NUMBER OF PIPE _ PIPEFLOW THRU SUBAREA(CFS) = 93.10 TRAVEL TIME(MI4.) _ .21 TC(MIN.� = 16.47 �c�lc�k�c�k* �K�K�Ic�K�K�K�K�c�Ic�cxx�fc�l c�c�ic�ic�k�K�k*** �c* �K�k�k�c�k* �K�Kx�cx�K�K* �k�lc�lc�c* x**** �Kxxx�K�c�c�c�c�c�K�c�c�Ic *�c�c�c *x�c FLOW PROCESS FPQM NODE 10.00 TO NODE 10.00 IS CODE = 8 --------------------------------------------------------- >> > >>ADDITION 0= SUBAREA TO MAINLINE PEAK FLOW< <<<< ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- 25 YEAR RAI:F -_L INTENSITY(INCH /HOUR) = 3.080 SOIL CLASSIFICX - ION IS "A'' RESIDENTIAL -> i -4 DWELLINGS/ACRE SUBAREA LOSS RATE, Fm( :'CH /HR) _ .5S20 SUBAREA AREA(A3?ES) = 3.60 SUBAREA RUNOFF(CFS) = 3.09 EFFECTIVE AREA(ACRES) = 45.34 AVERAGED Fm(INC /HR) _ .638 TOTAL AREA(ACRES) = 48.20 PEAK FLOW RATE(CFS) = 99.66 TC(MIN) = 16.4' FLOW PROCESS FPOM NODE 10.00 TO NODE 10.00 IS CODE = 8 ---------------------------------------------------------------------- - - - - -- > > > > >ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<< 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.080 SOIL CLASSIFICA -ION IS "A'' RESIDENTIAL -> S -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(:NCH /HR) _ .5320 SUBAREA AREA(ACRES) = 7.70 SUBAREA RUNOFF(CFS) _ 17.31 EFFECTIVE AREVACRES) = 53.04 AVERAGED Fm(INCH /HR) _ .630 TOTAL AREA(ACRES) = 55.90 PEAK FLOW RATE(CFS) = 116.97 TC(MIN) = 16.47 - - FLOW - PROCESS FROM NODE 11.00 TO NODE 12.00 IS CODE = 2 >>> > >RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<,< DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 3 -4 DWELLINGS/ACRE INITIAL SUBAREA FLOW - LENGTH = 1000.00 UPSTREAM ELEVATION = 1766.00 DOWNSTREAM ELEVATION = 1695.00 ELEVATION DIFFEzENCE = 71.00 TC = .4124( 1!00.00 ** 3.00)/( 71.10)] ** .20 = 11. =83 25 YEAR RAIJFAALL INTENSITY(INCH /HOUR) = 4.064 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(14CH /HR) _ .5820 SUBAREA RUNOFF(CFS) = 24.45 TOTAL AREA(ACP.ES) = 7.80 PEAK FLCW RATE(CFS) = 24.45 FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 6 ---------------------------------------------------------------------------- - - > >> >> COMPUTE STREETFLOW - TRAVELTIME - THRU - SUBAREA < << < < ---------------- - - - - -- UPSTREAM ELEVATION = 1695.00 DOWNSTREAM ELEVATION = 1672.00 STREET LENGTH(FEET) = 400.00 CURB HEIGTH(INCHES) E. STREET HALFWIDTH(FEET) = 18.00 DISTANCE FROM GOWN TO CROSSFALL GRADEBREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVEL - IME COMPUTED USING MEAN FLOW(CFS) = 27.84 STREETFLOW MODEL RESULTS: STREET FLCWDEPTH(FEET) _ .61 HALFSTFEET FLOODWIDTH(FEET) = 16.44 IP AVERAGE FLOW VELOCITY(FEET /SEC.) = 7.97 PRODUCT OF DEPTH &VELOCITY = 4.84 STREETFLOW TRAVELTIME(MIN) = .84 TC(MIN) = 11.92 25 YEAR RAINFALL INTENSITY(INCH /HOUR; = 3.863 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm( :NCH /HR) _ .5820 SUBAREA AREA(ACRES) = 2.30 SUBAREA RUNOFF(CFS) = 6.79 EFFECTIVE AREA(ACRES) = 10.10 AVERAGED Fm(INCH /HR) _ .582 TOTAL AREA(ACRES) = 10.10 PEAK FLOW RATE(CFS) = 29.82 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .61 HALFSTREET FLOODWIDTH(FEET) = 16.:= FLOW VELOCITY(FEET /SEC.) = 8.54 DEPTH *VELOCITY = i.is FLOW PROCESS PROM NODE 13.00 TO NODE 13.00 IS CODE = 1 >> > >>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<< CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION(MINUTES) = 11.92 RAINFALL INTENSITY (INCH. /HOUR) = 3.86 EFFECTIVE STREAM AREA(ACRES) = 10.10 TOTAL STREAM AREA(ACRES) = 10.10 PEAK FLOW RATE(CFS) AT CONFLUENCE = 29.82 FLOW PROCESS FROM NODE 14.00 TO NODE 15.00 IS CODE = 2 > >> > >RATIONAL METHOD INITIAL SUBAREA ANALYSIS <<:<< U T n n n 0 r li 0 TC = K *[(LEND - : xx 3.00) /( ELEVAATION CHANGE)) ** .20 INITIAL SUBAREA FLOW- LENGTH = 760.00 UPSTREAM ELEV? :QN = 1 732.00 DOWNSTREAM ESE XTION = 1698.00 ELEVATION DIFF =PENCE = 34.00 TC = .412 *[( 760.00 ** 3.00)/( 34.00)] ** .20 = 10.392 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 4.114. SOIL CLASSIFICA -ION IS "A'' RESIDENTIAL 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fmt:4CH /HR) _ .6820 SUBAREA RUNOFF(CPS) = 7.95 TOTAL AREA(ACRES; = 2.50 PEAK FLOW RATE(CFS) = 7.95 FLOW PROCESS F ?CM NODE 15.00 TO NODE 16.00 IS CODE = 6 -- - --------------------------------------------------------------------- >>>>>COMPUTE S- REETFLOW TRAVELTIME THRU SUBAREA<<<<< ---------------------------------------------------------------------------- UPSTREAM ELE'V'ATION = 1698.00 DOWNSTREAM ELEVATION = 1676.00 STREET LENGTH(FEET) = 380.00 CURB HEIGTH(INCHES) = c. STREET HALFW!17H(FEET) = 18.00 DISTANCE FROM CROWN TO CROSSFALL GRADEEREAK = 10.00 INTERIOR STREET CROSSFALL(DECIMAL) = .020 OUTSIDE STREET CROSSFALL(DECIMAL) = .040 SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1 * *TRAVEL -IME COMPUTED USING MEAN FLOW(CFS) _ S.74 STREETFLOW 4 0CEL RESULTS: STREET = LOWDEPTH(FEET) _ .43 HALFSTREET FLOODWIDTH(FEET) = 7.81 AVERAGE FLOW VELOCITY(FEET /SEC.) = 7.11 PRODUCT OF DEPTH &VELOCITY = 3.06 STREETFLOW TRAVELTIME(MIN) = .89 TC(MIN) = 11.78 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.394 SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm( :NCH /HR) _ .5820 SUBAREA AREA(ACRES) = 1.20 SUBAREA RUNOFF(CFS) = 3.58 EFFECTIVE AREA(ACRES) = 3.70 AVERAGED Fm(INCH /HR) _ .582 TOTAL AREA(ACRES) = 3.70 PEAK FLOW RATE(CFS) = ...03 END OF SUBAREA STREETFLOW HYDRAULICS: DEPTH(FEET) = .44 HALFSTREET FLOODWIDTH(FEET) = 8.3' FLOW VELOCITY'FEET /SEC.) = 7.45 DEPTH *VELOCITY = 3.:,1 FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 1 >>> >>DESIGNATE INDEPENDENT STREAM FOR CCNFLUENCE<<<<< >> >>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<(< CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCEATRATION(MINUTES) = 11.78 RAINFALL INTENSITY (INCH./HOUR) = 3.89 EFFECTIVE STREAM AREA(ACRES) = 3.70 TOTAL STREAM AREA(ACRES) = 3.70 PEAK FLOW RATE(OFS) AT CONFLUENCE = 11.03 CONFLUENCE INFORMATION: STREAM PEAK F_OW TIME INTENSITY _FM - EFFECTI`E 11 .2 ct 58 10. 11.7 3.,94 RAINFALL iFJTE S_ '; ' -Y AND 'IME OF CONCE11TrATION RATIO CONFLUENCE FCPlA USED FCR STREAMS. SUMMARY RESULTS-: STREAM CONFLUENCE EFFECTIVE NUMBER 0(CFS AREA(ACRES) --------------------------------------------- 1 40.75 13. 2 40.'9 13.68 COMPUTED CONFLUIE'10E ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE(CFS) = 40.79 TIME('lINUTES) EFFECTIVE AREAt�"CRES) = 13.68 TOTAL AREA(ACRES) = 13.30 - - FLOW PROCESS FROM NODE 13.00 TO NODE 17.00 IS CODE = 3 > >> >>COMPUTE PI =EFLOW TRAVELTIME THRU SzJBAREA< < <<< >> > > >USING CCMPt:TER- ESTIMATED PIPESIZE :NON- PRESSURE FL:;`rq)<<<<< DEPTH OF FLOW i'+ 24.0 INCH PIPE IS 15.3 INCHES PIPEFLOW `l'ELOCI- '(FEET /SEC. ) = 19.4 J UPSTREAM NODE E_ NATION = 1672.00 DOWNSTREAM NODE E LEVATION = 1621.00 FLOWLENGTH(FEE- = 800.00 MANNINGS N = .013 ESTIMATED PIPE _IAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPEFLCW THRU S.;BAREA(CFS) = 40.79 TRAVEL TIME(MI _ .69 TC(MIN.) = 12.47 FLOW PROCESS PPOH NODE 17.00 TO NODE 17.00 IS CODE = 1 -= ---------------------------------------------------------------------------- > >>> %DESIGNATE - -INDEPENDENT STREAM FOR CONFLUENCE<<<<< CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENT?ATION(MINUTES) = 12.47 RAINFALL INTENSITY (INCH. /HOUR) = 3.74 EFFECTIVE STREAM AREA(ACRES) = 13.68 TOTAL STREAM AREM ACRES) = 13.80 PEAK FLOW RATE( _-FS) AT CONFLUENCE = 40.79 FLOW PROCESS FROM NODE 19.00 TO NODE 18.00 IS CODE = 2 >> > > >RATIONAL METHOD INITIAL SUBAREA ANALYSIS<< <<< ------------------------------------------- DEVELOPMENT IS SINGLE FAMILY RESIDENTIAL -> 3 -4 DWELLINGS /ACRE TC = K *[(LENGTHx* 3.00) /(ELEVATION CHANGE)] ** .20 INITIAL SUBAREA LOW- LENGTH = 1000.00 UPSTREAM ELEVATION = 1672.00 DOWNSTREAM ELE`ATION = 1621.00 ELEVATION DIFFEPENCE = 51.00 TC = .412 *[( '000.00 ** 3.00)/( 51.00)] ** .20 = 11.1E41 25 YEAR RAINFALL INTENSITY(INCH /HOUR! = 3.880 SOIL CLASSIFICATION IS "A" RESIDENTIAL - > Z -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .5820 SUBAREA RUNOFF(CFS) 10.09 = TOTAL AREA(ACRE =) = 3.40 PEAK FLOW RATE(CFS) = 10.09 FLOW PROCESS FPCM NODE 18.00 TO NOEE 13.00 IS CODE = 8 ---------------------------------------------------------------------------- > >>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW < < < << 25 YEAR RAINFALL INTENSITY(INCH /HOUR; = 3.880 SOIL CLASSIFICA710N IS 'A' RESIDENTIAL -> 8 -4 DWELLINGS /ACRE SUBAPEA LOSS RATE, Fm :NCH /HR) _ .5820 ' SUBAREA AREA(ACPES) = 3.10 SUBAREA RUNOFF(CFS) = 9.20 EFFECTIVE AREA P CRES) = 5.50 AVERAGED Fm(INC /HR) _ .582 TOTAL AREA(ACRES) = 6.50 PEAK FLOW RATE(CFS) = 19.30 TC(MIN) = 11.84 FLOW PROCESS FROM NODE 18.00 TO NODE 17.00 IS CODE = 3 --------------------------------- ---- ------------------------ > >> >> COMPUTE PIP =FLOW TRAVELTIME THRU �UBAREA<< <<< > >>>Q SING COMPUTER- ESTIMATED PIPESIZE (NON- PRESSURE FLCX& < < << DEPTH OF FLOW IN 21.0 INCH PIPE IS 16.6 INCHES PIPEFLOW VELOCI- ''(FEET /SEC.) = 9.4 UPSTREAM NODE EwEVATION = 1622.00 DOWNSTREAM NODE ELEVATION = 1621.00 FLOWLENGTH(FEET; = 60.00 MANNINGS N = .013 ESTIMATED PIPE !IAMETER(INCH) = 21.00 NUMBER OF PIPES = 1 PIPEFLOW THRU SUBAREA(CFS) = 19.30 TRAVEL TIME(MIN.) = .11 TC(MIN.) = 11.95 FLOW PROCESS FRCM NODE 17.00 TO NODE 17.00 IS CODE = 1 ---------------------------------------------------------------------------- > » >> DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<.<<< >> > > >AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MINUTES) = 11.95 RAINFALL INTENSITY (INCH. /HOUR) = 3.36 EFFECTIVE STREAM AREA(ACRES) = 6.50 TOTAL STREAM AREA(ACRES) = 6.50 PEAK FLOW RATE(OFS) AT CONFLUENCE = 19.30 CONFLUENCE INFORMATION: STREAM PEAK FLOW TIME INTENSITY FM EFFECTIVE NUMBER RATE(CFS) (MIN.) (INCH /HOUR) (IN /HR) AREA(ACRES) ------------------------------------------------------------- 1 40.79 12.47 3.742 .58 13.58 2 19.30 11.95 3.856 .58 6.50 RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO jvgFhNfNR USED FOR 2 STREAMS. STREAM CONFLUENCE EFFECTIVE NUMBER G(CFS) AREA(ACRES) - - -- ---- ---- ---- ------ 1 59.41 2 59.78 19.61 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: PEAK FLOW RATE NFS) = 59.78 TIME(MINUTES) = 11.947 EFFECTIVE AREA(ACRES) = 19.61 ' TOTAL AREA(ACRES) = 20.30 �i H* Lill i H fifi FLOW PROCESS FPSM NODE 17.00 TO NODE 17.00 IS COEE = 8 >:?:>ADDITICPJ �= SUBAREA TO MAIPJLI "JE ?EAK FLOW << <<< 25 YEAR RAINFALL INTENSITY(INCH /HOUR = 3.856 ------- - - - - -- SOIL CLASSIFICATION IS "A'' RESIDENTIAL -; 3 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .5820 SUBAREA AREA(ACRES) = 2.80 SUBAREA. RUNOFF(CFS) = 8.25 EFFECTIVE AREA(ACRES) = 22.41 AVERAGED Fm(INCH /HR) _ .582 TOTAL AREA(ACRES) = 23.10 ' PEAK FLOW RATE(CFS) = 66.04 TC(MIN) = 11.95 FLOW PROCESS FROM NODE 17.00 TO NODE 17.00 IS CODE = 8 > >>>>ADDITION CF SUBAREA TO MAINLINE PEAK ---------------------------------------------------------------------------- FLOW<<<<< ---------------------------------------------------------------------------- 25 YEAR RAINFALL INTENSITY(INCH /HOUR) = 3.856 ' SOIL CLASSIFICATION IS "A'' RESIDENTIAL -> 2 -4 DWELLINGS /ACRE SUBAREA LOSS RATE, Fm(INCH /HR) _ .5820 SUBAREA AREA(ACRES) = 5.10 SUBAREA RUNOFF(CFS) = 15.03 EFFECTIVE AREA(ACRES) = 27.51 AVERAGED Fm(INCH /HR) _ .582 TOTAL AREA(ACRES) = 28.20 PEAK FLOW RATE(CFS) = 81.07 TC(MIN) = 11.95 END OF STUDY SUMMARY: TOTAL AREA(ACRES) = 28.20 EFFECTIVE AREA(ACRES) = 27.51 PEAK FLOW RATE(CFS) = 81.07 END OF RATIONAL METHOD ANALYSIS �i H* Lill i H fifi