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HomeMy WebLinkAboutTract Map 9833 Lot 3 Hydrology & Hydraulics AMY 1\1. C f'ttAftol'/ HYDROLOGY AND HYDRAULIC CALCS. LOT ~ 3 'TRAcT 9855 , ) DESIGN RUNOFF METHOD OF COMPUTING RUNOFF Used rational method per Riverside County Flood Control and Water Conservation District Hydrology Manual. Q = CIA WHERE : Q = Peak Discharge (CFS) C = Coefficient Of Runoff I = Rainfall Intensity (in/hr.) - Corresponding to Time of Concentration A = Area (Acres) 10 Year and 100 Year Frequency was calculated Collection areas are located so as to conform ,to Riverside county Road Department criteria. Q10 must:not peak higher than the top of the curb. Q100 must not peak higher than R/W elevation. \ l ) 1000 800 Tc' -100 90 80 LIMITATIONS: I. Maximum longth = 1000' . 2. Maximum oroo = 10 Acre. - '" ~ Ii ...tL ~ t) m " :il ~ " :soo go 200 6/'5 / <i / ~ ,/ 7 =- ~_..- 60 700 -'-.'- "" - .. .. ... - 0:: .. E ~ .. > .. 'U 500~ ________ .2 <.> .. :t 600 c 400 0' .. ~ o 350 .S! - 300 c ... o 250 - ..J .c - co c: .. ..J 200 150 100 50 '100 00 ... ~ : E g ~ 8'1:c 0) 0; .. .. ~~: l< K M 1: UnMyolopod 0 -:; 2' Good Co~ ..' ...;/, Un<icvolopod c; (0 Fair Cover 0 ~= .0 35 .. () ... 30 r. - " c 'E 25 .~ 20 19 18 17 16 / - -~ ~ g / Comm0fcial :;: 14 '/7(PO ,g 13 / c: / .. ' g ly2 '2.) 8 . .. o , o A;. ;:.::)~'I-".""'IWU/.I r: i= .9 KEY , L 4-j-Tc-K-Tc o 7 EXAMPLI;:: (I) L =550', ,H =5.0~ K = Single Fomily(l/4 Ac.) 35 Development, Tc = 12.6 min. (2) L =550', H =5.0', K = Commorcio( . Dovolopmont , Tc = 9.7 inin. 6 40 5 4 Reference: BibliolJrophy item No. 35. RCFC./& WCD HYDROLOGY ~;lANUAL '\ TIME OF CONCENTRATION FOR INITIAL SUBAREA PLATE 0-3 Tc 5 - C 0.> B-"-- ~ /' ~ - .. ;.- ., 9-0 ., 0> oS , 14 15 16 17 18 19 20 ~ o ... '" ., - ::> E E c ~ 25 c .~ - o ~ C .. <.> , c: o u 30 - o .. .~ I- ~ a:: ::::J o I 0:: W ll.. en w :r: .u z I :r I- en z w I- Z ~ -1 <3: lJ... 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