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HomeMy WebLinkAboutTract Map 20591 Lot 9 Rancho Baptist Church Hydrology Study F GVW ENGINEERING CIVIL ENGINEERING—SURVEYING—LAND PLANNING 1323 S. LYMAN AVENUE, GLENDORA, CALIFORNIA 91740 TELEPHONES (951)522-6199 E-MAIL danGDavwenaineerina.com Hydrology Study For 2 year , 10 year and 100 year storm events Project: Rancho Baptist Church Parking Lot Addition 29775 Santiago Road Temecula, CA 92592 Prepared for: Rancho Baptist Church 29775 Santiago Road Temecula, CA 92592 (951) 676-2911 Keith West— Project Manager Project Data: Total Parcel Area 4.16 acres gross Total Drainage Area 1.91 acres QM.�O�ESS�IOyq A. k APN: 922-130-017 9 Prepared by: Eno 12-3; -13 Danny M. Pierce '' ul CIVtl RCE No. 24979 �r'�lf of License Renewal 12/31/2013' Date: June 20, 2013 Rev. August 5, 2013 1 of 2 GVW ENGINEERING CIVIL ENGINEERING—SURVEYING—LAND PLANNING 1323 S. LYMAN AVENUE, GLENDORA, CALIFORNIA 91740 TELEPHONES (951)522-6199 E-MAIL dan(a)gvwengineering.com Hydrology Narrative This hydrology study investigates the 2 year, 10 year and 100 year storm events for the addition to the parking area of Rancho Baptist Church. The total parcel area is 4.16 gross acres. The total tributary area of the study is 1.91 acres and will drain to a proposed infiltration system to be constructed with the parking lot addition. The tributary area is divided into two drainage areas. Drainage area Al consists of an existing building, existing plaza area with grass and concrete walks and the proposed parking lot addition contains 1.27 acres. Drainage area A2 consists of the proposed gravel overlay area for occasional parking contains 0.64 acres. Both Drainage Areas Al and A2 will drain to the proposed infiltration system. No offsite drainage enters the site. The remainder of the site consists of a sanctuary building, office building, parking and landscape areas that flow north in the existing parking area to Santiago Road. The proposed infiltration trench is designed in conformance with the City of Temecula design guidelines. The infiltration trench is sized for the existing improvements, the proposed parking lot addition and an additional 0.71 acres of impervious surface for future improvements. In the event a storm of unusual magnitude exceeds the capacity of the infiltration trench, the stormwater will flow in a cobble bottom swale to a catch basin and pipe system at the northwest end of the infiltration trench. The catch basin and pipe system will discharge near a 24" culvert that will carry the stormwater under the freeway as drainage currently leaves the site. The swale, catch basin and pipe system are designed to carry a 100 year storm event. The following hydrology data establishes the 2 year, 10 year and 100 year flows and velocities for project drainage areas. The hydraulic calculations verify the adequacy of the overflow swale, catch basin and pipe system to carry the 100 year storm. 2 of 2 GVW Engineering Hydrology Study Agency: City of Temecula Project No.: RBC Project Rancho Baptist Church Date: 6/20/2013 29775 Santiago Road Prepared by: DMP Development Phase: Pre Additional Development Storm Event 100 year Drainage Area High Low A Elev. Flow Average K Soil Tc 1100 C1OD Q1W Area No. Point Point Path Slope Impervious Type Time of Rainfall Runoff Flow Elev. Elev. Surface& Concentration Intensity Coefficient Rate acres ft ft ft ft % Cover min in/hr cfs Al 1.27 37.1 32.4 4.7 446 1.1% 2S% C 13.2 2.986 0.784 2.97 A2 0.64 35.5 32.4. 3.1 310 1.0% 0%Poor C 13.5 2.950 0.748 1.41 4.39 Prorated QT=,for Q,u having Shorter Tc QT=I=QA1+QAZ(Tc AI/Tc AZ)= 2.97+1.41(13.2/13.5)= 4.35 Sof3 GVW Engineering Hydrology Study Development Phase: Pre Additional Development Storm Event 10 year Drainage Area High Low A Elev. Flow Average K Soil Tc lio CIO Q10 Area No. Point Point Path Slope Land Type. Time of Rainfall Runoff Flow Elev. Elev. Use& Concentration Intensity Coefficient Rate acres ft ft ft ft % Cover min in/hr cfs Al 1.27 37.1 32.4 4.7 446 1.1% 25% C 13.2 2.024 0.740 1.90 A2 0.64 35.5 32.4 3.1 310 1.0% 0%Poor C 13.5 2.000 0.691 0.88 2.79 Prorated QT=,for QAI having Shorter Tc QT=i=Qni+Qu(Tc,u/Tc,u)= 1.90+0.88(13.2/13.5)= 2.77 2of3 GVW Engineering Hydrology Study Development Phase: Pre Additional Development Storm Event 2 year Drainage Area High Low A Elev. Flow Average K Soil Tc 12 Cz Qz Area No. Point Point Path Slope Land Type Time of Rainfall Runoff Flow Elev. Elev. Use& Concentration Intensity Coefficient Rate acres ft ft ft ft % Cover min in/hr cfs Al 1.27 37.1 32.4 4.7 446 1.1% 25% . C 13.2 1.2 0.672 1.02 A2 0.64 35.5 32.4 3.1 310 1.0% 0% Poor C 13.5 1.18 0.589 0.44 1.47 Prorated QTcuj for Q,u having Shorter Tc QT=1=QA2+QAZ(Tc Al/Tc A=)= 1.02+0.589(13.2/13.5)= 1.46 3of3 GVW Engineering Hydrology Study Agency: City of Temecula Project No.: RBC Project Rancho Baptist Church Date: 6/20/2013 29775 Santiago Road Prepared by: DMP Development Phase: Post Additional Development Storm Event 100 year Drainage Area High Low A Elev. Flow Average K Soil Tc 1100 C100 Q100 Area No. Point Point Path Slope Land Type Time of Rainfall Runoff Flow Elev. Elev. Use& Concentration Intensity Coefficient Rate acres ft ft ft ft % Cover min in/hr cfs Al 1.27 37.1 32.4 4.7 446 1.1% 80% C 9.1 3.67 0.880 4.10 A2 0.64 35.5 32.4 3.1 376 0.8% 10% C 14.4 2.93 0.762 1.43 5.53 Prorated QT=1 for CIA, having Shorter Tc QTOM1=QAl+QA2(Tc Al/Tc A=) = 4.1+1.43(9.1/14.4)= 5.00 1of3 GVW Engineering Hydrology Study Storm Event 10 year Drainage Area High Low A Elev. Flow Average K Soil Tc 110 C10 Q10 Area No. Point Point Path Slope Land Type Time of Rainfall Runoff Flow Elev. Elev. Use& Concentration Intensity Coefficient Rate acres ft ft ft ft % Cover min in/hr cfs Al 1.27 37.1 32.4 4.7 446 1.1% 80% C 9.1 2.486 0.880 2.78 A2 0.64 35.5 32.4 3.1 376 0.8% 10% C 14.4 1.932 0.610 0.75 3.53 Prorated QTwi for QAl having Shorter Tc QToni=QAl+Q,u(Tc Al/Tc AZ)= 2.78+0.75(9.1/14.4)= 3.25 2of3 GVW Engineering Hydrology Study Storm Event 2 year Drainage Area High Low A Elev. Flow Average K Soll Tc 12 C2 Q2 Area No. Point Point Path Slope Land Type Time of Rainfall Runoff Flow Elev. Elev. Use& Concentration Intensity Coefficient Rate acres ft ft ft ft % Cover min in/hr cfs Al 1.27 37.1 32.4 4.7 446 1.1% 80% C 9.1 1.46 0.880 1.63 A2 0.64 35.5 32.4 3.1 376 0.8% 10% C 14.4 1.15 0.762 0.56 2.19 Prorated QT., ,for QAI having Shorter Tc QToul=Q,U +Qa2(Tc pi/Tc p2)= 1.63+0.56(9.1/14.4)= 1.99 3of3 GVW Engineering Hydrology Study Agency: City of Temecula Project No.: RBC Project Rancho Baptist Church Date: 6/20/2013 29775 Santiago Road Prepared by: DMP Development Phase: Post Additional Development Velocities-Post Development Addition Drainage Slope Storm Q V` Area % Frequency cfs fps Al 1.1% 100 4.10 2.1 10 2.78 1.95 2 1.63 1.68 A2 0.8% 100 1.43 1.45 10 0.75 1•• 2 0.56 0.8•` • From RCFCD D-6.1 Natural Valley Channel •` Estimated- Below chart minimum Q of l 1of1 �Nc/s0 B/9PJ�Si Cvc.2Ci/ D/17/o ZC/ 77S Ss�.vTiflGo /�o.,o C B,9s A.✓a /�PE SiZi fo.e Q�� O✓Ee<co w Q.on = -5 0 CFS C.9rci. 94s/n. 2' X 2'GQa?E /.✓cEr T/sE C�CN BAsav �eo..,�s /_ 73 O✓ER %no,f, �ga9 W Aletowb /bNO,�,c acO.7.S W,E/Q FLbw CdNr7QGLJ Cf}?LH Of�S/,� �A�i9�/7y+ Flst�mE .SO '/o oc' /°ert/mE�'� /S CLosGEO. L=/°/2 = WVQ 4'ya7W 8/2 =41 /f DFP;w oc- 4tP.4ce f ow C = 3,0 -AtmuLA — B40Ao `ea7F4 Q = CL y '-t Q = 3.0 7. 5c -3 7(�.ce=S,Oc�s w�ni P/pE DErrn of 1cwt, = 04.v..o9cE A"o 41 ',2SS /-Vlftl xa It LIMITATIONS: T- �'z IWi6% L 100 1. Maximum length = 1000' TC 1000 90 2. Maximum area = 10 Acres 5 900 80 0 800 70 6 w m 40 a 300 700 60 > 0 200 7 n e c 600 0 50 o 0 o $ 8 0 ar a a 40 i o E 30 500 0 �/) 2 m d 20 9 0 g e 21 m 35 a 10 LL 400 30 Undeveloped O m 2 12 c Good Cover _ o . 350 e 25 undeveloped C 1.0 Falr Cover .e 14 o E _ 300 Undeveloped ` v 15 9 Poor Cover 0 _ .2 2 y 16 250 tv 17 Single ly ram , 17 E 16 Aere) • 18 a o �5 Commercia 0 m 19 �. o (Pav 20 �- J 200 P 13 / d e o 12 8 11 y 25 0 0 u KEY 150 E g L-H Tc-K-Tc c 8 30 m EXAMPLE: E 7 (1) L=550', H =5.0, K=Single Family(1/4 Ac.) 35 Development ,Tc = 12.6 min. 1100 6 (2) L=550', H =5.0', K= Commercial 40 Development , Tc= 9.7 min. 5 4 Reference:Bibliography item No. 35. R C F C A W C D TIME OF CONCENTRATION HYDROLOGY MANUAL FOR INITIAL SUBAREA PLATE D-3 1J1e�a..v vcE f} AZ- P,� D�iv�smw.ouo�.r oor saw P,aeVWV )%e Gw4 Tc' LIMITATIONS: rr/J,s'/rJi� L 100 1. Maximum length =i000' TC 1000 90 2. Maximum area = 10 Acres 5 900 80 g 800 7O u H6 Sao u a o 400 Q 700 60 g > 9 300 200 a c c 7 .� 0 n 'E 100 m 600 C 50 0 0 0 1b 8 C 010, m o 40 m o E a s 30 0 500 a 0 (f) d 20 9 0 m L' a 10 21 - 0 35 8 m e E n ; o Z ° K A' O e I I a 400 0 30 Undevelope a G rer 2 12 c_ m 350 2 Undeveloped c 1.0 o Fair Cover 0 E .6 14 F 300 undeveloped 15 0 'e .5 20 Poor Co 0 c .2 19 t6 �. `o 18 Si Family 50 iv / 17 E J 250 F I6 (1/4 Acre) 0 18 c 0 15 Commercia 0 0 19 7F P (Po v 20 -1200 c 13 d c 12 T) S 8 11 y 25 o 0 KEY I50 9 L-H Tc-K-Tc c 8 30 m E%AMPLE: E 7 (1) L=550', H =5.0, K=Single Family(I/4 Ac.) 35 Development ,Tc = 12.6 min. 6 100 (2) L =550', H =5.0', K= Commercial 40 Development , Tc= 9.7 min. 5 4 Reference:Bibliography item No. 35. 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M.NrM .I ...■■■..wwmm..M ..lNnx • - • - IgI�t�mM■..M�MN�■rm.w■■M�■H.MMN..CCNII�.WN.Hr C.CN COVER TYPE-URBAN LANDSCAPING�.mI =am M.■I N.p 1 CI • INDEX II...Mrmr�Y■N..■pptllr■■ .r NMw.m Nr■p NUMBER M. l�tN�tl ' ■tN�Nw � t i - ■■�it■■■tu i tt ■ ■t�■■■■poi■�w�■�Y�■����■�Yw���� �■W N■■Y->•GiiGiw■_■� `��■N . �i■■raWH� �_ CZ��■■■■■■w ■■t►'�tlt•\'�.!..1 tl■Y�i■tHHt■/r-i=IWf�G:,- �W■■■ N WOMEN ■■WH �■1NiN��At�NNN ■■ ' ■■N'�W.1lR'\���ll:r�YP��■NtSao" ^:■q W^�ItH� NPp■�uY.ttF:):�Y�tR� 17./ItP�■■t■ttt■!i■ji�■�t■H■ ■ MpYI[>%tHll7'i!a■�.Y N■Wi ■■tN son rjw'AM't!fFAIaW'�y 0'ANEMONE ME V/t'ItfwlN■/H:/S;Yitt!■NV ��■�■t ■Nt tHt'I■iIY.E WlwwIt tJ or •Yi r M r■1•li/R�ittV rH■e�t■Nt■■■■H■■■t■■l9:•!dL"J7l JILIt■ttt■1 IO.OSgA✓I lA N NtW NIINK'M'I■■■ti>' N ■INRI.I'7.N■C+✓ �� ■'•f■I F:I,111111no J'IH■I r� 1itN/ItN7Nt!/' �NN■■W I■ +I■■O t ItwtIAiIJ Itt7■■■r.Y�OHtyN■tt■H■N■t ' INII, IN t■'1■NW■0■■tNWW■NNt■■■W■ ■■■■�■Ntp■�■p■ , Nr■�/■tYN■/,NNW■INN■W■■■WtNH■tW■�W tH■Y!■t■ WiffillAINOTj r,io ■■W■■t■■Nl■■Nt■N■N■■■H■NN■NWNW■ ■■'MAIM V,WM AO■tNtW■fNt■p■■■ttW W■NNNtt■ttitlt■■W N 111■FI,■N'ItNWtt■Ytt■■■t■t■■Ntt■ttt■In IN 0 t ■ t■W■W ■ ■Iir■■■iIIN�IWHt■N■■■ ■■■■■■ tM■t■■ RRNEW ■ ■IIIItI�1/■/:J■NWttW■t■ NN�Ntttt■/N■ ■W�■■■ It da■Vam■■ ■ so■O■�■■t�N■nhtN■q��f���■t Ntt■`�■_■■-WN.NN 11r■tllt-^r'A■■t■Wp■.m N■�■ p• Yt:LlL31�� ■tpN1..■N ■•t/lN�/tN HtttNYW■■ NNmtNNNtWHt■■■ttt■tH ■■■IIi:i I■Nt■■H■NH M■■■N■N■Htl■■W 11�%t1��it�■N■ttt■�■■YV�r■r-rr■�t� ■■■t�t7■'H t■ � /��Nt■ Wt MAMMON" ■ 11tllt■'•���!�■■■ `-L� ■ ' ■LY�(^`�(Y--• •�{�T•�■■IN a tt■ tttNW■■■■■ ■ ■ ■ ■ It11tI■ttt■Ht■ }r�l1Y.`Ai■rill■■ /■'■It/'N■t■NNN Wt■Ntt t■WN■tN■■t■■N■■■�N■tNt ttNN■N■N■N N■■■■WiW!N■B■NtN■NNttN■NHim■� somuW ■■WNWHttN■o■pN�g�yH■�N■W tNt■■■■Ni■UNKNOWN slmomH■ ■amoOWt■fimNumps ■Ill/iWHNNN ■ 1■ WNBtNN■ ■■■ an t■■ H as Nt■tWt�H■t� ■■ N ■■■■■■tW HWtttN■■tN■ttN011W7■■■tW■tW tt■N ■■I NttW NBNW■■t■t■NNN■■■■NtWtt■W■■H■tOt�N 1'�11■■H■W■p�A■W■■p ■ N■t■t�NNN��pN�WW■ttt■ 1Itiiw�t ■■■■ ■■��■N■■NW I■I■NtNtN■■ttW/■■■■tNW W '1■NN■t■■Wt■ttN■N■tHtN■■t■N Ir■NH■HIN w�u tNNNW W■■tNNNN7Y■N • ' • • r11WtNNWt■■N�tB■H■t■■N■■/■ H ■ ■■ ■ 111■N ttYNW■Nt ■■t tNN■ womm�mmo�� a ;I RUNOFF COEFFICIENT CURVES ON �mmmn�n MEN SOIL GROUP—C 1■1■N % NH■NtYNHH ■t■NWHB:H COVERMEN LANDSCAPING � 1■tN ■ • I ■nnm ■11 • INDEX pp.. 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NN■■INNm■■NNN■■N■■■■■■ ■I■Y • LANDSCAPING AMC-]:[ ItNdNYdNW■Nttw■■■■■■t�pp■■�N 11■W�NWaHN�W�■t■■■■�NH:N RUNOFF INDEX 1■INW N■■■w■■■■■■N■Y■tN■■NN Ilt■/ttt■Ntl d■dWd ■N■■t NNNI/■ NpN • ■■N■■OtI.NN■N■ • ■ ■u ■ ���..MO..wt•t•t•Y�t•Yaa•�Ya•p���� ��'"3� +p■N■■■■N■YNNNNN■iiio.w..o ppm�,, 'gW! ■■rlNo��■M=rWN�ar��..N■NI '�Z�.. NV'i■N■R\'1.!a�q�a■`■a■WtP�.a■■■�■t■tM��� NNl�ia.��-Nt■tN v. ; 0:_; ��.■ .t■iGv_— ei�NttMY ■ _ 'S%!-::%tv■ ItRG.■■■�G�tN�q■��VN..■�/■Na■v_�N�■1� ■■triW.YRS/.�■ty-ANS- NwY■/BVup�W■■■t t ■■ t/vrur�-:u■t�asrrv■■■■�t►� ■■■■��������■■ - IN.■Irc/'i■NG,'�N::/■■OtN �■■MEN■■Y!'tL■i7ii' /I I■?'/.�;r noME ►%■ �N■■■■■■■N NNNN rY�/t■■■� r■■� .. ".N 4 tO.tNa�tC'a■■►■►.I/■s.�m■woNNu■■■ rltr/t■c•��■■Ns•,■Nt•,� ■t/I■■1•'I■•I■t■!:7.t■■■ tom ■ derr.L7.N■ra✓.■Nr.Mw■� ruoer,■■■y ■ t•Irrw.I� N■NtYpN • r,mW&w/I vt■CI R■B.=r ■i ■Wst■N■N e■ N �u�I§W■e'la�.w►�t■ tNq■�■■N■pN■tsat■■■N ■m u W ir/vM■wi Mtt■>•d■NN■t�t■�■■tN■NM��Y��■t■ �N,■!■■N ■ ■■IIt I■f_^11■■t�NNttHtt■NNtHNHN■ttt■tN■N■■tN ■ ■t'II,■t:.INI�■t■NNNN■■N ■W■■W■NNHNt■ ■t IIItF1,■N'/ION■tNNtttYt■■■NNt■■tt■N ■ W■W B t O�'I■B.Y NNNN ■■■U■ ■■ ■N ■Nt■■ ■■„ �I�Ii�FI1QJ%YN■YW■Ntwtt ■ ■W■�■N■�■N■0 ■t■■ t ■■ ■III■ti:'N!i/l■■ ■■W■WOMEN tNtNWpr■■Nt■■ MEMO ■■Idt■V I���N■■NN■■■t■N■■■N■■N■■ttt■N NN■�N�NW /INI■71Nw■■■■■Nt■t!t■■ttN■ N■N ■N ■p■.t. ■� ��%N1�\//I■W■■N�■N O�N■■CM�N■1aNN�■■WW■■■■� ■tt■ ■B01t:i■■■■HN■■!■NN■�■■WN■■pN I q■■/Wpp■i����•it�a�I■ ■�MN� ■tt t■tt ■■IMUM ■W■tN\■.wounomNN■t,Y■N■ • 1 �1■Il�t■■���■ItHYV�`I�lilfiilJ■ ��ri�itriH�■t■■t�■tN■■tt■N� •t'/Nit■■■tw■W■Ntt■tNNN■tN■NNNH■N■■N so my It■■11■Ntt■IN■■■tNt■tMtt■ttN■NN■N■NN ■tpN mCC%N■tN"ICommommanoNNNi■ tNW ~�N■OY��■. ■W�tNNWd N"Itm taw WtWt■Nt■ t�■t■tWNN■HN■■■tO tll■rl■■■■■■NNN■WNN NNNNNN■H ■t■ tlr■ll■■■■Nw■N■NN■■ W■■■t■■■p■� tt ■■■lu■N mNN■■u■Ntwl■N■N■WN■t■■KE W ■■■■■is■aw■■■N■Nm■■■t■N■m■■■■■■NN■■■■ �.■■r ■w N■NNw N■■tNt ttNWN■N■N WIf■NN■■■Nt■N■N■■N ■niNWNn■■N■Ntu tN WWN■■■N■W■N■ L■I IWNN■I WE Or N 11■Ilt■N■N■I N■t■■■t IsI1N� om■■Nn■Nt■■■N■■N�N■■N 1 ,IN Y■lNNw■N■tNt■■■■■■N■tpNpN■ an mN�■■omm\Np■W■■■■W■■■N■Ilt■■tV.■■■ ■q�N • - • • 111■N■■N■■I■N■�t■■t■■t■HtNN■N■ Apsom�ms RUNOFF COEFFICIENT CURVES /II■■■■tN■■I■N■Nl.t■■W■■■tN■■NN� ■ ■ ■fit �■Y�IUNNt�tt■t■N■Oemso"MAN • - • - 5N■■4N�NMN�gYW.■■N■■tt�pp��■■■N l tt■ ■NtNWN■■tNt COVER - LANDSCAPING ■ W■ rN = Wt 1 ll■WW■INNWt ImomN RUNOFF INDEX Ed HNNN NH w■NstN - • - • ■tt>_N■w • ,D.Q,oi.✓.9G� A.eeFi� A /—Pesr .OevtYo�.evr IFA1Dinle�v.. BO$/.1ny11,er�,� Tc' LIMITATIONS: L 100 1. Maximum length =1000' TC 1000 90 2. Maximum area = 10 Acres 5 900 80 800 70 cb 6 E 40 a 300 a 700 60 E —> 0 200 7 C o N 10$$0 m 600 c SO ' o ob B o O o m 40 > o E 30 500 d 20 9 0 o m L+ c 10 �+ F 35 g ; 6 10 400 g 30 Undeveloped 0 o Good Cover T m 2 c N m 350 25 Undeveloped C 1.0 ` c Fair Cover ;6 E 14 F v 300 Undeveloped •3 1 15 19 Poor Cover- 0 _o` .2 o 19 16 c 18 Single Family io 17 E J 250 ► 16 17 (1/4 Acre) 50 18 ` t o 15 Commer ' 19 .2 14 (p 20 12 J 200 13 WCo 12 F 25 c I50 a KEY u E 9 L•+i Tc-K-Tc c H 8 30 0 EXAMPLE: E i- 7 (1) L=550', H =5.0,K=Single Family(1/4Ad 35 Development ,Tc = 12.6 min. 100 6 (2) L=550', H =5.0', K= Commercial 40 Development , Tc=9.7 min. 5 4 Reference:Bibliography item No. 35. R C F C & WCD E OF CONCENTRATION HYDROLOGY MANUAL FOR INITIAL SUBAREA PLATE D-3 A# w -grar Awv A2 -4jy-•Llty wdow r OW-es)ew-16% Av-Oft t mta Tc' LIMITATIONS: T.r/f L 100 1. Maximum length =1000' Tc 1000 90 2. Maximum area = 10 Acres 5 900 80 H 800 70 6 g oo a 0 300 v 700 60 > 8 200 c d 7 r `c n c E N 100 0 600 50 0 0 0 b 8 C o E v °' 3300CL 0 500 a 0 (/) m m d 20 9 a e 10 o Q 3g 6 10 0 f K A o e 400 0` 30 0 Good Cover 0 0 2 12 c m - e350 25 undeveloped c 1. Cc Fair Cover 14 E _ 300 undeveloped IS 9 Poor Co _o` .2 2 16 o �, 18 a Faml1Y 17 E J 250 16 (I/4 Acre) 0 18 c c o Comme►cia Do 19 F a 14 (Pav 20 �- 0 200 P 13 WC o 12 z1 8 II y d 25 I50 m KEY u E 9 L•H Tc-K-Tc c 8 30 m EXAMPLE: E H 7 (1) L=550', H =5.0, K=Single Family(1/4 Ac.) 35 Development ,Tc = 12.6 min. 1100 6 (2) L=550', H =5.0', K= Commercial 40 Development , Tc= 9.7 inin. 5 4 Reference:Bibliography item No. 35. 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STORMDURATION _ DURATION HYDROLOGY MANUAL CPRVES - CALCULATION SHEET m RAINFALL INTENSITY- INCHES PER HOUR A MIRY LOMA MURRIETA - TEMECULA NORCO PALM SPRINGS PERRIS VALLEY It RANCHO CALIFORNIA MUNITION FREQUENCY DURATION FREQUENCY DURATION FREQUENCY DURATION FREQUENCY DURATION FREQUENCY A 6IMU7[S MIMUT[S MINUTES MINUTES MINUTES 10 100 10 100 10 100 10 100 10 100 { TC1R YEAR YEAR YEAR YEAR YEAR YEAR YEAR YEAR YEAR S 2.66 6.60 S 3.65 S.10 S 2.77 4.16 5 6.23 6.76 S 2.64 3.70 6 2.58 6.07 6 3.12 6.61 6 2.53 3.79 6 3.80 6.08 6 2.61 3.66 7 2.37 3.75 7 2.87 6.26 7 2.36 3.S1 1 3.60 S.56 7 2.26 3.21 D 8 2.21 3.69 6 2.67 3.96 8 2.19 3.29 0 3.22 5.15 8 2.00 3.01 2.00 1.28 9 2.50 3.69 9 2.07 3.10 9 3.01 6.61 9 1.98 2.86 c v 10 1.96 3.10 10 2.36 3.00 10 1.96 2.96 10 2.83 6.52 10 1.68 2.69 D 11 1.07 2.95 11 2.26 3.30 II I.87 2.60 11 2.67 6,28 11 1.79 2.S7 r 12 1.76 2.62 12 2.13 3.IS 12 1.79 2.68 12 2.56 6.07 12 1.72 2.66 13 1.71 2.70 13 2.06 3.01 13 1.72 2.58 13 2.63 3.88 I] 1.65 2.37 16 1.64 2.60 16 1.96 2.69 16 1.66 2.68 16 2.33 3.72 16 1.59 2.29 IS I.S8 2.50 1s 1.69 2.79 IS 1.60 2.60 1! 2.23 3.S8 IS 1.56 2.21 16 1.53 2.62 16 1.62 2.69 16 1.95 2.32 16 2.15 3.66 16 1.69 2.16 17 1.60 2.36 17 1.76 2.60 17 I.SO 2.25 17 2.00 3.32 17 1.65 2.00 to 1.66 2.27 10 1.71 2.S2 18 1.66 2.19 10 2.01 3.22 18 1.61 2.02 19 1.60 2.21 19 1.66 2.65 19 1.62 2.13 19 1.95 3.12 19 1.37 1.97 20 1.36 2.15 20 1.61 2.38 20 1.39 2.08 20 1.89 3.03 20 1.36 1,92 22 • 1.29 2.06 22 I.S3 2.26 22 1.32 1.99 22 1.79 2.86 22 1.20 1.83 26 1.26 1.93 26 1.66 2.15 26- 1.26 1.90 26 1.70 2.72 26 1.22 1.75 26 1.18 1.87 26 1.39 2.06 26 1.22 1.82 26 1.61 2.50 26 1.18 1.69 20 1.16 1.80 26 1.36 1.90 28 1.17 1.76 28 1.56 2.69 28 1.13 1.63 30 1.10 1.73 30 1.29 1.90 30 1.13 1.70 30 1.69 2.39 30 1.10 1.57 32 1.06 1.67 32 1.26 1.86 32 1.10 1.66 32 1.66 2.30 32 1.06 1.52 Z 36 1.03 1.62 36 1.20 1.76 36 1.06 1•S9 36 1.39 2.22 36 1.03 1.68 1 36 1.00 1.57 36 1.17 1.72 36 1.03 1.SS 36 1.36 2.1S 36 1.00 1.66 m 36 .9/ 1.57 38 1.17 1.67 38 1.01 1•SI 38 1.30 2.09 ]6 .98 1.60 C Z 60 .96 1.69 60 1.10 1.62 60 .98 1.67 60 1.27 2.02 60 .95 1.37 65 .69 1.60 6S 1.03 1.S2 65 .92 1.39 65 1.18 1.09 65 .90 1.29 50 .86 1.32 so .97 1.66 So .68 1.31 SO 1.11 1.70 s0 .85 1.22 m Z SS .50 1.26 Ss .92 1.36 55 ,86 1.25 Ss 1.05 1.68 S5 .61 1.17 M 60 .76 1.20 60 .08 1.30 60 .60 1.20 60 1.00 1.60 60 .78 I.12 ' p 6s .73 I.Is 6s .66 1.26 65 ,77 I.Is 65 .95 I.S3 65 ,Is 1.06 r p D 70 .70 1.11 70 .61 1.19 TO .76 1.11 70 .91 1.66 70 .tt 1.06 p C 75 .60 1.07 IS .78 I.Is 75 .72 1.07 75 .09 1.61 75 .70 1.00 In D ;0 p 80 .6S 1.03 80 .75 1.11 00 .69 1.06 so .05 1.35 80 .68 .97 D 55 .63 1.00 as .73 1.07 as .67 1.01 6s .82 1.31 0s .66 .96 o D � I A O SLOPE • .530 SLOPE • .550 SLOPE • .SOO SLOPE • .580 SLOPE • .690 Z A