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HomeMy WebLinkAboutArea 8 AREA 8 Rational method, 100 year storm Yb calculation cm z I 4 w �� i w a m I a Si 1 7 ,, • . . . • 1 i 7VN EH 1 ;r \„, t. ,,. .4101....... JF 0 _ rilli --.3.40D-Aiw - - 1 1 • a 1 • 1 • • • • • • •+� I lik 1,,,,or # I 1 ________ _____ sim o iv , vzs ___ O ....., i . NI (- - '6' i t 11 raw' I r a • w 1 I • - . 4 1 • 4 r ill • .... .i. I 1 1, a.. • Oa lib • lip 1 4 lb 00 rrti O % 0)0e. .' � O L '1 0 41114 _ ., ,. ii... \fr--,- "MI ? L c ,i i c:, 0 . 0:-. 4 \ 1:4 /.-'44irr, C".311**... diwil' Eli . , 111 C5f t i alli 1 ___. _ _ <IC 411) 1 1114 t. I fi r..,-...1 v ^�,r� 1 1 illariegN * 4) - „ ...... Or 4 . -, 4. I'lligili i 1\ - 1 ' '?"...:-:-.. 4 0 • '`.. 41 .4 y � 67./A4 fir 1S711311 ono ..o. alhim. Ile la 1 la ` 4 ' ( - • Ii i LA•414 Is All il 6.46...4.161_____■.• i __ ,0". to /31 , 1 0 • 1 IMO I • I --"--4-- 11* %, 1 V MI. • r r ji WWI coot 'w in+m loin * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE (Reference: 1986 SAN BERNARDINO CO. HYDROLOGY CRITERION) (c) Copyright 1983 -2003 Advanced Engineering Software (aes) Ver. 8.0 Release Date: 01/01/2003 License ID 1400 Analysis prepared by: Allard Engineering 8253 Sierria Avenue Fontana Ca. 92335 * * * * * * * * * * * * * * * * * * * * * * * * ** DESCRIPTION OF STUDY * * * * * * * * * * * * * * * * * * * * * * * * ** * MASTER PLAN OF DRAINAGE * * 100 YEAR STORM * * AREA 8 * ******************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FILE NAME: MASTER28.DAT TIME /DATE OF STUDY: 08:52 10/11/2006 USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: -- *TIME -OF- CONCENTRATION MODEL*-- USER SPECIFIED STORM EVENT(YEAR) = 100.00 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90 *USER- DEFINED LOGARITHMIC INTERPOLATION USED FOR RAINFALL* SLOPE OF INTENSITY DURATION CURVE(LOG(I;IN /HR) vs. LOG(Tc;MIN)) = 0.6000 USER SPECIFIED 1 -HOUR INTENSITY(INCH /HOUR) = 1.2300 *ANTECEDENT MOISTURE CONDITION (AMC) III ASSUMED FOR RATIONAL METHOD* *USER- DEFINED STREET - SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET - CROSSFALL: CURB GUTTER - GEOMETRIES: MANNING WIDTH CROSSFALL IN- / OUT- /PARK- HEIGHT WIDTH LIP HIKE FACTOR NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n) 1 18.0 12.0 0.020/0.020/0.020 0.67 1.50 0.0200 0.125 0.0180 2 22.0 12.0 0.020/0.020/0.020 0.67 1.50 0.0200 0.125 0.0180 GLOBAL STREET FLOW -DEPTH CONSTRAINTS: 1. Relative Flow -Depth = 0.25 FEET as (Maximum Allowable Street Flow Depth) - (Top -of -Curb) 2. (Depth) *(Velocity) Constraint = 10.0 (FT *FT /S) *SIZE PIPE WITH A FLOW CAPACITY GREATER THAN OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.* *USER- SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 95.00 TO NODE 96.00 IS CODE = 21 ---------------------------------------------------------------------------- » » >R.ATIONAL METHOD INITIAL SUBAREA ANALYSIS « «< »USE TIME -OF- CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA« INITIAL SUBAREA FLOW - LENGTH(FEET) = 1000.00 ELEVATION DATA: UPSTREAM(FEET) = 942.00 DOWNSTREAM(FEET) = 932.00 Tc = K *[(LENGTH ** 3.00) /(ELEVATION CHANGE)]* *0.20 SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 19.388 * 100 YEAR RAINFALL INTENSITY(INCH /HR) = 2.423 SUBAREA Tc AND LOSS RATE DATA(AMC III): DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc LAND USE GROUP (ACRES) (INCH /HR) (DECIMAL) CN (MIN.) RESIDENTIAL(ARID) ".4 DWELLING /ACRE" B 9.30 0.20 0.90 92 19.39 SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH /HR) = 0.20 SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.90 SUBAREA RUNOFF(CFS) = 18.77 TOTAL AREA(ACRES) = 9.30 PEAK FLOW RATE(CFS) = 18.77 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 96.00 TO NODE 100.00 IS CODE = 52 » »>COMPUTE NATURAL VALLEY CHANNEL FLOW« «< » »>TRAVELTIME THRU SUBAREA« «< ELEVATION DATA: UPSTREAM(FEET) = 932.00 DOWNSTREAM(FEET) = 926.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 833.00 CHANNEL SLOPE = 0.0072 CHANNEL FLOW THRU SUBAREA(CFS) = 18.77 FLOW VELOCITY(FEET /SEC) = 2.50 (PER LACFCD /RCFC &WCD HYDROLOGY MANUAL) TRAVEL TIME(MIN.) = 5.55 Tc(MIN.) = 24.94 LONGEST FLOWPATH FROM NODE 95.00 TO NODE 100.00 = 1833.00 FEET. ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** FLOW PROCESS FROM NODE 100.00 TO NODE 100.00 IS CODE = 81 » »>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW« «< MAINLINE Tc(MIN) = 24.94 * 100 YEAR RAINFALL INTENSITY(INCH /HR) = 2.083 SUBAREA LOSS RATE DATA(AMC III): DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS LAND USE GROUP (ACRES) (INCH /HR) (DECIMAL) CN NATURAL POOR COVER "BARREN" B 18.90 0.03 1.00 97 SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH /HR) = 0.03 SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.00 SUBAREA AREA(ACRES) = 18.90 SUBAREA RUNOFF(CFS) = 34.86 EFFECTIVE AREA(ACRES) = 28.20 AREA - AVERAGED Fm(INCH/HR) = 0.08 AREA - AVERAGED Fp(INCH/HR) = 0.08 AREA- AVERAGED Ap = 0.97 TOTAL AREA(ACRES) = 28.20 PEAK FLOW RATE(CFS) = 50.79 END OF STUDY SUMMARY: TOTAL AREA(ACRES) = 28.20 TC(MIN.) = 24.94 EFFECTIVE AREA(ACRES) = 28.20 AREA - AVERAGED Fm(INCH /HR)= 0.08 AREA- AVERAGED Fp(INCH /HR) = 0.08 AREA- AVERAGED Ap = 0.97 PEAK FLOW RATE(CFS) = 50.79 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** NON - HOMOGENEOUS WATERSHED AREA- AVERAGED LOSS RATE (Fm) AND LOW LOSS FRACTION ESTIMATIONS (C) Copyright 1989 -2003 Advanced Engineering Software (aes) Ver. 9.0 Release Date: 01/01/2003 License ID 1400 Analysis prepared by: Allard Engineering 8253 Sierria Avenue Fontana Ca. 92335 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** Problem Descriptions: MASTER PLAN OF DRAINAGE AREA 8 YB CALCULATION NON - HOMOGENEOUS WATERSHED AREA- AVERAGED LOSS RATE (Fm) AND LOW LOSS FRACTION ESTIMATIONS FOR AMC II: TOTAL 24 -HOUR DURATION RAINFALL DEPTH = 8.00 (inches) SOIL -COVER AREA PERCENT OF SCS CURVE LOSS RATE TYPE (Acres) PERVIOUS AREA NUMBER Fp(in. /hr.) YIELD 1 9.30 90.00 56. 0.748 0.422 2 18.90 100.00 78. 0.416 0.674 TOTAL AREA (Acres) = 28.20 AREA- AVERAGED LOSS RATE, Fm (in. /hr.) = 0.501 AREA- AVERAGED LOW LOSS FRACTION, Y = 0.409 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** NON - HOMOGENEOUS WATERSHED AREA- AVERAGED LOSS RATE (Fm) AND LOW LOSS FRACTION ESTIMATIONS (C) Copyright 1989 -2003 Advanced Engineering Software (aes) Ver. 9.0 Release Date: 01/01/2003 License ID 1400 Analysis prepared by: Allard Engineering 8253 Sierria Avenue Fontana Ca. 92335 ********************************************* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ** Problem Descriptions: MASTER PLAN OF DRAINAGE AREA 8 YB CALCULATION * ** NON- HOMOGENEOUS WATERSHED AREA- AVERAGED LOSS RATE (Fm) AND LOW LOSS FRACTION ESTIMATIONS FOR AMC III: TOTAL 24 -HOUR DURATION RAINFALL DEPTH = 8.00 (inches) SOIL -COVER AREA PERCENT OF SCS CURVE LOSS RATE TYPE (Acres) PERVIOUS AREA NUMBER Fp(in. /hr.) YIELD 1 9.30 90.00 76.( 56.) 0.452 0.677 2 18.90 100.00 93.( 78.) 0.140 0.895 TOTAL AREA (Acres) = 28.20 AREA- AVERAGED LOSS RATE, Fm (in. /hr.) = 0.228 AREA- AVERAGED LOW LOSS FRACTION, Y = 0.177