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HomeMy WebLinkAboutParcel Map 23496 Hydrology for Rough Grading North Plaza -- ~ . . /' ROBERT BEIN, WILLIAM FROST & ASSOCIATES - "-~ PROFESSIONAL ENGINEERS, PLANNERS & SURVEYORS HYDROLOGY/HYDRAULICS REPORT FOR PM 2g~'~4 ROUGH GRADING ..~...... , ~8<t'9~ PREPARED FOR: NORTH PLAZA LLC 11439 LAUREL CREST STUDIO CITY, CA CONTACT: MICHAEL TYLMAN JUNE, 1999 J.N.401441 Professional Service Since 1944 27555 YNEZ ROAD' SUITE 400' TEMECULA, CALIFORNIA 92591-4679' 909.676.8042' FAX 909.676.7240 OFFICES LOCATED THROUGHOUT CALIFORNIA, ARIZONA AND NEVADA' WEB SITE: www.rbf.com \ ptO"lledOrlf<lcyClad,,- . . 441-10.res **************************************************************************** RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM BASED ON RIVERSIDE COUNTY FLOOD CONTROL & WATER CONSERVATION DISTRICT (RCFC&WCD) 1978 HYDROLOGY MANUAL (c) Copyright 1982-97 Advanced Engineering Software (aes) Ver. I.SA Release Date: 01/01/97 License ID 1264 Analysis prepared by: Robert Bein, William Frost & Associates 14725 ~ton Parkway Irvine, California 92618 ************************** DESCRIPTION OF STUDY ************************** * 10 YEAR STORM * ROUGH GRADING *PM 23496 * * * ************************************************************************** FILE NAME: 441-10.DAT TIME/DATE OF STUDY: 10: 9 6/25/1999 ---------------------------------------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: ---------------------------------------------------------------------------- USER SPECIFIED STORM EVENT(YEAR) = 10.00 SPECIFIED MINIMUM PIPE SIZE(INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS (DECIMAL) TO USE FOR FRICTION SLOPE 0.95 10-YEAR STORM 10-MINUTE INTENSITY (INCH/HOUR) = 2.360 10-YEAR STORM 60-MINUTE INTENSITY (INCH/HOUR) = 0.880 100-YEAR STORM 10-MINUTE INTENSITY (INCH/HOUR) = 3.480 100-YEAR STORM 60-MINUTE INTENSITY (INCH/HOUR) = 1.300 SLOPE OF 10-YEAj\ INTENSITY-DURATION CURVE = 0.5505732 SLOPE OF 100-YEAR INTENSITY-DURATION CURVE = 0.5495536 COMPUTED RAINFALL INTENSITY DATA: STORM EVENT = 10.00 1-HOUR INTENSITY(INCH/HOUR) = 0.8888 SLOPE OF INTENSITY DURATION CURVE = 0.5506 RCFC&WCD HYDROLOGY MANUAL "e"-VALUES USED NOTE: COMPUTE CONFLUENCE VALUES ACCORDING TO RCFC&WCD HYDROLOGY MANUAL AND IGNORE OTHER CONFLUENCE COMBINATIONS FOR DOWNSTREAM ANALYSES **************************************************************************** FLOW PROCESS FROM NODE 23.00 TO NODE 24.00 IS CODE = 21 ~A \\A" ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< ----------------------~----------------------------------------------------- ---------------------------------------------------------------------------- ASSUMED INITIAL SUBAREA UNIFORM DEVELOPMENT IS: UNDEVELOPED WITH POOR COVER TC = K*[(LENGTH**3)/(ELEVATION CHANGE)] **.2 INITIAL SUBAREA FLOW-LENGTH = 690.00 UPSTREAM ELEVAT10N = 1067.10 DOWNSTREAM ELEVATION = 1040.00 ELEVATION DIFFERENCE = 27.10 TC = 0.533*[( 690.00**3)/( 27.10)J**.2 10 YEAR RAINFALL INTENSITY (INCH/HOUR) = SOIL CLASSIFICATION IS "e" UNDEVELOPED WATERSHED RUNOFF COEFFICIENT ~ .6916 SUBAREA RUNOFF(CFS) 10.45 TOTAL AREA(ACRES) = 7.60 13.903 1. 98 8 TOTAL RUNOFF (CFS) 10.45 **************************************************************************** FLOW PROCESS FROM NODE 25.00 TO NODE 26.00 IS CODE = 21 ~'~I, -------~--------------------------~----------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< Page 1 '?- . . 441-10.res -------------------------------------------------~-------------------------~ ---------------------------------------------------------------------------- ASSUMED INITIAL SUBAREA UNIFORM DEVELOPMENT IS: UNDEVELOPED WITH POOR COVER :TC = K*((LENGTH**3)/(ELEVATION CHANGE)]**.2 :INITIAL SUBAREA FLOW-LENGTH = 780.00 UPSTREAM ELEVATION = 1066.00 DOWNSTREAM ELEVATION = 1046.00 ELEVATION DIFFERENCE = 20.00 TC = 0.533*[( 780.00**3)/( 20.00)J**.2 15.902 10 YEAR RAINFAIL INTENSITY (INCH/HOUR) = 1.846 SOIL CLASSIFICATION IS "c" UNDEVELOPED WATERSHED RUNOFF COEFFICIENT = .6795 SUBAREA RUNOFF(CFS) = 4.64 :TOTAL AREA(ACRES) = 3.70 TOTAL RUNOFF(CFS) 4.64 ============================================================================ 'END OF STUDY SUMMARY: PEAK FLOW RATE (CFS) = TOTAL AREA(ACRES) = 4.64 3.70 Tc(MIN.) = 15.90 ============================================================================ END OF RATIONAL METHOD ANALYSIS 1 Page 2 ~ . . 441-100.res **************************************************************************** RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM BASED ON RIVERSIDE COUNTY FLOOD CONTROL & WATER CONSERVATION DISTRICT (RCFC&WCD) 1978 HYDROLOGY MANUAL (c) CopYIight 1982-97 Advanced Engineering Software (aes) Ver. 1.SA Release Date: 01/01/97 License ID 1264 Analysis prepared by: Robert Beinr William Frost & Associates 14725 ~ton Parkway IIvine, California 92618 ************************** DESCRIPTION OF STUDY ************************** * 100 YEAR STORM * 'ROUGH GRADING PLAN *PM 23496 * * * ************************************************************************** "FILE NAME: 441-100.DAT TIME/DATE OF STUDY: 10:13 6/25/1999 ---------------------------------------------------------------------------- ,USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION: --------------------------------------------------~------------------------- !USER SPECIFIED STORM EVENT(YEAR) = 100,00 'SPECIFIED MINIMUM PIPE SIZE (INCH) = 18.00 SPECIFIED PERCENT OF GRADIENTS (DECIMAL) TO USE FOR FRICTION SLOPE 0.95 10-YEAR STORM 10-MINUTE INTENSITY (INCH/HOUR) = 2.360 10-YEAR STORM 60-MINUTE INTENSITY (INCH/HOUR) = 0.880 100-YEAR STORM 10-MINUTE INTENSITY (INCH/HOUR) = 3.480 100-YEAR STORM GO-MINUTE INTENSITY(INCH!HOUR) = 1.300 SLOP8 OF 10-Y~' INTENSITY-DURATION CURVE = 0.5505732 SLOPE OF 100-YEAR INTENSITY-DURATION CURVE = 0.5495536 COMPUTED RAINFALL INTENSITY DATA: STO&~ EVENT = 100.00 1-HOUR INTENSITY (INCH/HOUR) = 1.3000 SLOPE OF INTENSITY DURATION CURVE = 0.5496 RCFC&WCD HYDROLOGY MANUAL "C"-VALUES USED NOTE: COMPUTE CONFLUENCE VALUES ACCORDING TO RCFC&WCD HYDROLOGY MANUAL AND IGNORE OTHER CONFLUENCE COMBINATIONS FOR DOWNSTREAM ANALYSES **************************************************************************** " " FLOW PROCESS FROM NODE 23.00 TO NODE 24.00 IS CODE = 21 ~~ ~ ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< -------------------------------------~-------------------------------------- ---------------------------------------------------------------------------- ASSUMED INITIAL SUBAREA UNIFORM DEVELOPMENT IS: UNDEVELOPED WITH POOR COVER TC = K*[(LENGTH**3)/(ELEVATION CHANGE)]**.2 INITIAL SUBAREA FLOW-LENGTH = 690.00 UPSTREAM ELEVATION = 1067.10 DOWNSTREAM ELEVATION = 1040.00 ELEVATION DIFFERENCE = 27.10 TC = 0.533*[( 690.00**3)/( 27.10)J**.2 13.903 100 YEAR RAINFALL INTENSITY (INCH/HOUR) = 2.904 SOIL CLASSIFICATION IS "c" UNDEVELOPED WATERSHED RUNOFF COEFFICIENT = .7461 SUBAREA RUNOFF(CFS) 16.46 TOTAL AREA (ACRES) = 7.60 TOTAL RUNOFF (CFS) 16.46 **************************************************************************** FLOW PROCESS FROM NODE 25.00 TO NODE 26.00 IS CODE = 21 p,.~~ e:," ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< Page 1 ~ . . 441-100.res ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- ASSUMED INITIAL SUBAREA UNIFORM DEVELOPMENT IS: UNDEVELOPED WITH POOR COVER :TC = K*[(LENGTH**3)/(ELEVATION CHANGE)]**.2 iINITIAL SUBAREA FLOW-LENGTH = 780.00 ,UPSTREAM ELEVATION = 1066,00 .DOWNSTREAM ELEVATION = 1046.00 ELEVATION DIFFERENCE = 20.00 'TC ~ 0.533*[( 780.00**3)/( 20.00)J**.2 15.902 100 YEAR RAINFALL INTENSITY (INCH/HOUR) = 2.697 SOIL CLASSIFICATION IS "C" .UNDEVELOPED WATERSHED RUNOFF COEFFICIENT = .7364 SUBAREA RUNOFF(CFS) = 7.35 TOTAL AREA(ACRES) = 3.70 TOTAL RUNOFF(CFS) 7.35 ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- :END OF STUDY SUMMARY: PEAK FLOW RATE(CFS) = TOTAL AREA (ACRES) = 7.35 3.70 Tc(MIN.) = 15.90 ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- !END OF RATIONAL METHOD ANALYSIS 1 Page 2 5 . . . 441-p.res **************************************************************************** HYDRAULIC ELEMENTS - I PROGRAM PACKAGE (C) Copyright 1982-98 Advanced Engineering Software (aes) Ver. 6.1 Release Date: 01/01/98 License ID 1264 Analysis prepared by: Robert Bein, William Frost & Associates 14725 Alton Parkway Irvine, CA 92618 TIME/DATE OF STUDY: 10:27 6/25/1999 ---------~-----------~-------------------------~---------------------------- ---------------------------------------------------------------------------- ************************** DESCRIPTION OF STUDY ************************** * DEPTH OF FLOW - \ = '"<~ct... ~...-.."'-- * 18" CMP * BASIN "A" SEDIMENT BASIN ************************************************************************** * * * **************************************************************************** >>>>PIPEFLOW HYDRAULIC INPUT INFORMATION<<<< PIPE DIAMETER (FEET) = 18.000 PIPE SLOPE(FEET/FEET) = 0.2727 PIPEFLOW(CFS) = 16.50 MANNINGS FRICTION FACTOR = 0.024000 ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- CRITICAL-DEPTH FLOW INFORMATION: ---------------------------------------------------------------------------- CRITICAL DEPTH (FEET) = 0.80 CRITICAL FLOW AREA(SQUARE FEET) = 3.971 CRITICAL FLOW TOP-WIDTH(FEET) = 7.406 CRITICAL FLOW PRESSURE + MOMENTUM(POUNDS) = 215.15 CRITICAL FLOW VELOCITY(FEET/SEC.) = 4.155 CRITICAL FLOW VELOCITY HEAD (FEET) = 0.27 CRITICAL FLOW HYDRAULIC DEPTH(FEET) 0.54 CRITICAL FLOW SPECIFIC ENERGY(FEET) 1.07 ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- NORMAL-DEPTH FLOW INFORMATION: ---------------------------------------------------------------------------- NORMAL DEPTH(FEET) ~ 0.38 FLOW AREA(SQUARE FEET) - 1.29 FLOW TOP-WIDTH (FEET) = 5.145 FLOW PRESSURE + MOMENTUM (POUNDS) FLOW VELOCITY{FEET/SEC.) FLOW VELOCITY HEAD (FEET) - HYDRAULIC DEPTH(FEET) = 0.25 FROUDE NUMBER = 4.485 SPECIFIC ENERGY (FEET) = 420.59 12 .759 2.~2H 2.90 ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- 1 Page 1 (p