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HomeMy WebLinkAboutHydrology Sep.18, 2000 I I I I I I I I I I I I' I I I I I I I I INCLUDED WITHIN ARE HYDROLOGY AND HYDRAULIC CALCULATIONS USED IN THE DESIGN OF STORM DRAIN FOR PARCEL MAP 28627 (FRONT STREET) IN THE CITY OF TEMECULA SEPTEMBER 18, 2000 / PREPARED BY .!! a.::, Lohr + Associates Inc Land Planning 43513 Ridge Park Drive Civil Engineering Temecula, CA 92590 Surveying Ph. 909 676-6726 Fax 909 699-0896 ATTENTION: HERMAN HOVAGIMYAN TELEPHONE: (909) 676-6726 I I I .1 .1 I I I 'I I I I I I I I, I I I I ffl1. ~(}C, 17 JOB. NO. 7c,oo:3 (F1?()N76iJeeeT) BY 1kR.fr111-N DATE iill'1h8 , SHT. I OF _ HYDROLOGY "]..t. , , '" < J I 1\ " I-?~~" u-IIAECULA PARK \ .x- \~ ,I ~~ " C'-s.O~O.... "'" oJ""'~ "'~ y--t-...."f'C'c.. ..,~~ I 0","( Y, '" ""~ CHO ~. ~&.t'OWAI.TER AD i~\\ . 5 ~ ~ Co,l ~.. "t- o( ..... < ~ . / "" )\ I ,.....~"/Il .... I .... .... ...--_L_......' ", ~' . -' ....--- ~ '" " .~ ll.. 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VV'''--?''./.'1",~\.t _ t'1"~.:..;:r<i,l,t' ~ .. 1,',"\[ I' , \'- _ I I -J/ = B .....'... r f HYDROLOGIC SOILS GROUP MAP FOR TEMECULA ~ LEGEND SOLS GROUP BOUNDARY A SOILS GROUP DESIGNATION RCFCaWCD HYDROLOGY JVJANUAL ~-~ o FEET WOO PIIITI': 1;-160 I I I I -. I I I , I I I ,I I , I J I I 4 Te' LIMITATIONS' ...!:.. - 100 I. Maximum IlIlgtll . 1000 Feet Te 1000 90 2. Maximum area. 10 Acre. - 5 - (mlnJ 900 80 800 70 U - 500 6 ~ llIi: 400 :) - 500 Q 700 60 ... 'l' c: zoo .. ~ 7 !!! i 0 .. N 100 c: 600 e 50 .. la . Q, 0 e 0 .. eo 8 Q, 'i c: >lO 0 ,. . 'i . e !O ,. 'a Q, . 500 zo 9 Q "i5 U 35 10 10 b .. . I I I Q, ... .. I 400 .. 30 ; ----.!!2... II .5 .2 .. z 12 ... c: .. in 350 . 25 5 Undeveloped 1.0 c: Fair COVII' 0 .1 / 13 .. e ::/ " 0 ... 300 .. .5 20 oS \,1.' 15 . 19 .. .2 16 5 ... ,- 18 c: 0 .u Sin;1e Famlly ~7 17 e 250 I- 17 - - (S-7 DulAC) oJ 16 oS - ;.......5 18 5 15 Commercial - "" (Paved) 90 19 u. .. 0: 14 . KEY I- ... .. u 20 c: 200 .. c: - . ~ 13 / . L-H-Tc-K-Tc' c: oJ .. . . .!! ~ 12 \,1.' ... .. ... .. "/ 0 .. u .. c: ... 25 . 10 u 0 eL Dev.lopm.nt c: 150 0 . 9 80- Apartm.nt u e ... j:: 7S - Mobile HomB 0 8 65- Condominium 30 7 60- Single Family-S,OOO ft2 Lot 40- Singl. Famlly-1/4 Acre Lot 20- Sin;l. Family -I Acr. Lot 35 6 10 - Slngl. Family- 2 1/2 Acre Lot 10.0 40 EXAMPLE:.:.. 5 ( I) L' 550', H. 5.0', K. Sln;le FcImlly (5-7 DUlAC) Devllopment, TC'12.6 min. 4 (2) L'5!50', H.!5.0', K.Comm.rclal Development, TC'9.7 mln. SAN BERNARDINO COUNTY HYDROLOGY MANUAL TIME OF CONCENTRATION NOMOGRAPH ? FOR INITIAL SUBAREA Figure 0-1 D-4 1 ~ 1 ,vnNvl"4 A90"lOHOAH o :). W: :):J:) ~ (910 to) "\>-0 3J.y,,, - ~.L'1O S3^~n:> "? NOI.l~~nO - A.LISN3.LNI O~~ON~.LS -- 1 , -1 I I' I I' I, I I t . 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'Z mOWleIJrGMI e d.o.50 f /).A/f a.S1 / a.~ /1'S.'1 I ~,So ~,7~ 11,/1 IZ,,".1 ~.".oZdo e;:r:, t.54 1<< Yz sr. t:""w ;)(CEEDS T.e. 11'1 0,51 ~. 'I' 'Z4.(J 130, 'f I D,S1 4,11. t I." 1,7,7 0,53 4.38 2'1,0 I.. 5,5 ".,4 4,40 13," IS 3,4 I ".5'$ 4.84- 2,,",0 I' 2.4- 1',SI. 5.08 Z 5,/) 171.4- I 0,57 5.34 2',0 I & I. I. 11.58 5,U Z7,o l't I.S d,5'1 S.U zg.o 103.1 I 0,'0 './(, 2'/,0 Z 14.~ ",," ',4(, 30,0 tZ7.1 0.'2 '.1'- 31.0 Z ".~ 1'1.. 0,015 I I 0,'3 7,08 H./l "Z ';3.7 11.'+ 7.46 3 3,/l 'Z 47.t. 4.'5 7.74- 34.0 Z 82.8 i I, /I,"" B.(JS 35,0 ZH.\ 0.47 8,44- !4.1l ! 14,1 0.' 8 8.1/l ~i,O 331.4 I 0." tIS ~8.0. 341.4- 0.70 '.Ii" nO H7.~ I rt4w ;':XCi'ElJ$ o/IV , I I I C\ I I I I ,I I I I I I I I I I I I I I I I '3 \0 , I II' I I I I I I I I I I I I I I I I I Riverside County Rational Hydrology Program CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989 - 1998 Version 5.1 Rational Hydrology Study Date: 09/14/00 File:P28627.out ----------------------------------------------------------------------- PM 28627 HYDROLOGY ANALYSIS 10 YEAR STORM IN 26003 ----------------------------------------------------------------------- ********* Hydrology Study Control Information ********** English (in-lb) Units used in input data file ----------------------------------------------------------------------- Lohr + Associates, Inc., Temecula, California - SIN 773 ----------------------------------------------------------------------- Rational Method Hydrology Program based on Riverside County Flood Control & Water Conservation District 1978 hydrology manual Storm event (year) = 10,00 Antecedent Moisture Condition = 2 Standard intensity-duration curves data (Plate D-4.1) For the [ Murrieta,TmC,Rnch CaNorco ] area used. 10 year storm 10 minute intensity = 2.360 (In/Hr) 10 year storm 60 minute intensity = 0.880{In/Hr) 100 year storm 10 minute intensity = 3.480{In/Hr) 100 year storm 60 minute intensity = 1.300 (In/Hr) Storm event year = 10.0 Calculated rainfall intensity data: 1 hour intensity = 0.880 (In/Hr) Slope of intensity duration curve = 0.5500 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 100.000 to Point/Station 102.000 **** INITIAL AREA EVALUATION **** Initial area flow distance = 570.000{Ft.) Top (of initial area) elevation = 1002.200{Ft.) Bottom (of initial area) elevation = 994.400{Ft.) Difference in elevation = 7.800{Ft.) Slope = 0.01368 s{percent) = 1.37 TC = k{0.300) * [{length^3)1 {elevation change)]^0.2 Initial area time of concentration = 8.958 min. Rainfall intensity = 2,505{In/Hr) for a 10.0 year storm COMMERCIAL subarea type Runoff Coefficient = 0.873 Decimal fraction soil group A = 0.000 Decimal fraction soil group B = 1.000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil{AMC 2) = 56.00 Pervious area fraction = 0.100; Impervious fraction = 0.900 A-I \\ I I I I I I I Initial subarea runoff = Total initial stream area = Pervious area fraction = 0.100 2.S66(CFS) 1.310(Ac.l ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 102.000 to Point/Station 102.000 **** CONFLUENCE OF MINOR STREAMS **** Along Main Stream number: 1 in normal stream number 1 Stream flow area = 1.310(Ac.) Runoff from this stream = 2.S66(CFS) Time of concentration = S,96 min. Rainfall intensity = 2.505 (In/Hr) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 101.000 to Point/Station 102.000 **** INITIAL AREA EVALUATION **** I I I I j I Initial area flow distance = 520.000(Ft.) Top (of initial area) elevation = 9S.600(Ft.) Bottom (of initial area) elevation = 94.400(Ft.) Difference in elevation = 4.200(Ft.) Slope = O.OOSOS s(percent) = O.Sl TC = k(0.300)*[(length^3)/(elevation change)]^0.2 Initial area time of concentration = 9.596 min. Rainfall intensity = 2.412 (In/Hr) for a 10,0 year storm COMMERCIAL subarea type Runoff Coefficient = 0.S73 Decimal fraction soil group A = 0.000 A-2 Decimal fraction soil group B = 1.000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil(AMC 2) = 56.00 Pervious area fraction = 0.100; Impervious fraction = 0.900 Initial subarea runoff = 4.041(CFS) Total initial stream area = 1.920(Ac.) Pervious area fraction = 0.100 I I ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 102.000 to Point/Station 102.000 **** CONFLUENCE OF MINOR STREAMS **** . I Along Main Stream number: 1 in normal stream number 2 Stream flow area = 1.920(Ac.) Runoff from this stream = 4.041(CFS) Time of concentration = 9.60 min. Rainfall intensity = 2.412 (In/Hr) Summary of stream data: Stream No. Flow rate (CFS) TC (min) Rainfall Intensity (In/Hr) I I 1 2 Largest Qp = 2.S66 S.96 4.041 9.60 stream flow has longer time of 4.041 + sum of 2.505 2.412 concentration \~ I I I I I I I 'I I I II I I I I I I I I Qp = Qb 2.866 * 6.801 Ia/Ib 0.963 = 2.760 Total of 2 streams to confluence: Flow rates before confluence point: 2.866 4,041 Area of streams before confluence: 1.310 1.920 Results of confluence: Total flow rate = Time of concentration Effective stream area 6.801(CFS) = 9.596 min. after confluence = 3.230 (Ac.) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 200.000 to Point/Station 202,000 **** INITIAL AREA EVALUATION **** Initial area flow distance = 750.000(Ft.) Top (of initial area) elevation = 1001.300(Ft.) Bottom (of initial area) elevation = 994.100(Ft.) Difference in elevation = 7.200(Ft.) Slope = 0.00960 s(percent)= 0.96 TC = k(O,300)*[(length^3)/(elevation change)]^0.2 Initial area time of concentration = 10.732 min. Rainfall intensity = 2.268 (In/Hr) for a 10.0 year storm COMMERCIAL subarea type Runoff Coefficient = 0.872 Decimal fraction soil group A = 0.000 B-1 Decimal fraction soil group B = 1.000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil(AMC 2) = 56.00 Pervious area fraction = 0.100; Impervious fraction = 0.900 Initial subarea runoff = 5.929(CFS) Total initial stream area = 3.000(Ac.) Pervious area fraction = 0.100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 202.000 to Point/Station 202.000 **** CONFLUENCE OF MINOR STREAMS **** Along Main Stream number: 1 in normal stream number 1 Stream flow area = 3.000(Ac.) Runoff from this stream = 5.929(CFS) Time of concentration = 10.73 min. Rainfall intensity = 2.268(In/Hr) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 201.000 to Point/Station 202.000 **** INITIAL AREA EVALUATION **** Initial area flow distance = 710.000(Ft,) Top (of initial area) elevation = 98.600(Ft.) Bottom (of initial area) elevation = 93.900(Ft.) Difference in elevation = 4.700(Ft.) Slope = 0.00662 s(percent) = 0.66 \:? I I I I I I I I I I I I I I I I I I I TC = k(0.300)*[(lengthA3)/(elevation change)] AO.2 Initial area time of concentration = 11.310 min. Rainfall intensity = 2.203 (In/Hr) for a 10.0 year storm COMMERCIAL subarea type Runoff Coefficient = 0.871 Decimal fraction soil group A = 0.000 Decimal fraction soil group B = 1.000 (3, 2 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil(AMC 2) = 56.00 Pervious area fraction = 0.100; Impervious fraction = 0.900 Initial subarea runoff = 3.205(CFS} Total initial stream area = 1.670(Ac.} Pervious area fraction = 0.100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from point/Station 202.000 to Point/Station 202.000 **** CONFLUENCE OF MINOR STREAMS **** Along Main Stream number: 1 in normal stream number 2 Stream flow area = 1.670(Ac.} Runoff from this stream = 3.205(CFS) Time of concentration = 11.31 min. Rainfall intensity = 2.203 (In/Hr) Summary of stream data: Stream No. Flow rate (CFS) TC (min) Rainfall Intensity (In/Hr) 1 5.929 10.73 2 3.205 11.31 Largest stream flow has longer Qp = 5.929 + sum of Qa Tb/Ta 3.205 * 0.949 = Qp = 8,970 2.268 2.203 or shorter time of concentration 3.041 Total of 2 streams to confluence: Flow rates before confluence point: 5.929 3.205 Area of streams before confluence: 3.000 1.670 Results of confluence: Total flow rate = 8.970(CFS} Time of concentration = 10.732 min. Effective stream area after confluence = End of computations, total study area = The following figures may be used for a unit hydrograph study of the 4.670 (Ac . ) 7.90 (Ac.) same area. Area averaged pervious area fraction (Apl = Area averaged RI index number = 56.0 0.100 \~ I II I I I I I I I I I I I I I I I I I I 14 ,.. \'J I I I I I I I I I I I I I I I I I I I Riverside County Rational Hydrology Program CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989 - 1998 Version 5.1 Rational Hydrology Study Date: 09/14/00 File:P28627.out PM 28627 HYDROLOGY ANALYSIS 100 YEAR STORM IN 26003 ********* Hydrology Study Control Information ********** English (in-lb) Units used in input data file Lohr + Associates, Inc., Temecula, California - SIN 773 Rational Method Hydrology Program based on Riverside County Flood Control & Water Conservation District 1978 hydrology manual Storm event (year) = 100.00 Antecedent Moisture Condition = 2 Standard intensity-duration curves data (Plate D-4.1) For the [ Murrieta,TmC,Rnch CaNorco ] area used. 10 year storm 10 minute intensity = 2.360(In/Hr) 10 year storm 60 minute intensity = 0.880(In/Hr) 100 year storm 10 minute intensity = 3.480(In/Hr) 100 year storm 60 minute intensity = 1.300(In/Hr) Storm event year = 100.0 Calculated rainfall intensity data: 1 hour intensity = 1.300(In/Hr) Slope of intensity duration curve = 0.5500 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from point/Station 100.000 to Point/Station 102.000 **** INITIAL AREA EVALUATION **** Initial area flow distance = 570.000(Ft.) Top (of initial area) elevation = 1002.200(Ft.) Bottom (of initial area) elevation = 994.400(Ft.) Difference in elevation = 7.800(Ft.) Slope = 0.01368 s (percent) = 1.37 TC = k(0.300)*[(lengthA3)/(elevation change)] AO.2 Initial area time of concentration = 8.958 min. Rainfall intensity = 3.700(In/Hr) for a 100.0 year storm COMMERCIAL subarea type Runoff Coefficient = 0.880 A-I Decimal fraction soil group A = 0.000 Decimal fraction soil group B = 1.000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil{AMC 2) = 56.00 Pervious area fraction = 0.100; Impervious fraction = 0.900 \~ I I I I I I I Initial subarea runoff = Total initial stream area = Pervious area fraction = 0.100 4.266(CFS) 1.310 (Ac.) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 102.000 to Point/Station 102.000 **** CONFLUENCE OF MINOR STREAMS **** Along Main Stream number: 1 in normal stream number 1 Stream flow area = 1.310(Ac.) Runoff from this stream = 4.266(CFS) Time of concentration = 8.96 min. Rainfall intensity = 3,700(In/Hr) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 101.000 to Point/Station 102.000 **** INITIAL AREA EVALUATION **** I I I Initial area flow distance = 520.000(Ft.) Top (of initial area) elevation = 98.600(Ft.) Bottom (of initial area) elevation = 94.400(Ft.) Difference in elevation = 4.200(Ft.) Slope = 0.00808 s (percent) = 0.81 TC = k(0.300)*[(length^3)/(elevation change)]^0.2 Initial area time of concentration = 9.596 min. Rainfall intensity = 3.563 (In/Hr) for a 100.0 year storm COMMERCIAL subarea type Runoff Coefficient = 0.880 Decimal fraction soil group A = 0.000 fI- '2. Decimal fraction soil group B = 1.000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil(AMC 2) = 56.00 Pervious area fraction = 0.100; Impervious fraction = 0.900 Initial subarea runoff = 6.017(CFS) Total initial stream area = 1.920(Ac.) Pervious area fraction = 0.100 I I I I I ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 102.000 to Point/Station 102.000 **** CONFLUENCE OF MINOR STREAMS **** I Along Main Stream number: 1 in normal stream number 2 Stream flow area = 1.920(Ac.) Runoff from this stream = 6.0l7(CFS) Time of concentration = 9.60 min. Rainfall intensity = 3.563 (In/Hr) Summary of stream data: I Stream No. Flow rate (CFS) TC (min) Rainfall Intensity (In/Hr) I I 1 2 Largest Qp = 4.266 8.96 6.017 9.60 stream flow has longer time of 6.017 + sum of 3,700 3,563 concentration n I I I I I I I I I I I I I I I I I I I Qp= Qb 4.266 .. 10.124 Ia/Ib 0.963 = 4.108 Total of 2 streams to confluence: Flow rates before confluence point: 4.266 6.017 Area of streams before confluence: 1.310 1.920 Results of confluence: Total flow rate = 10.124(CFS) Time of concentration = 9.596 min. Effective stream area after confluence = 3.230(AC.) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 200.000 to Point/Station 202.000 ........ INITIAL AREA EVALUATION ........ Initial area flow distance = 750.000{Ft.) Top (of initial area) elevation = 1001.300(Ft.) Bottom (of initial area) elevation = 994.100(Ft.) Difference in elevation = 7.200(Ft.) Slope = 0.00960 s (percent) = 0.96 TC = k(0.300)"[(length^3)/(elevation change)]^0.2 Initial area time of concentration = 10.732 min, Rainfall intensity = 3.350(In/Hr) for a 100.0 year storm COMMERCIAL subarea type Runoff Coefficient = 0.879 Decimal fraction soil group A = 0.000 Decimal fraction soil group B = 1.000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil{AMC 2) = 56.00 Pervious area fraction = 0.100; Impervious fraction = 0.900 Initial subarea runoff = 8.830(CFS) Total initial stream area = 3.000(Ac.) Pervious area fraction = 0.100 ~-\ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 202.000 to Point/Station 202,000 ........ CONFLUENCE OF MINOR STREAMS ........ Along Main Stream number: 1 in normal stream number 1 Stream flow area = 3.000(Ac.) Runoff from this stream = 8.830(CFS) Time of concentration = 10.73 min. Rainfall intensity = 3.350(In/Hr) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 201.000 to Point/Station 202.000 ........ INITIAL AREA EVALUATION ........ Initial area flow distance = 710.000(Ft.) Top (of initial area) elevation = 98.600(Ft.) Bottom (of initial area) elevation = 93.900{Ft.) Difference in elevation = 4.700(Ft.) Slope = 0.00662 s (percent) = 0.66 V6 I I I I I I I I I I I I I I I I I I I /I TC = k(0.300)*[(lengthA3)/(elevation change)] AO.2 Initial area time of concentration = 11.310 min. Rainfall intensity = 3.255(In/Hr) for a 100.0 year storm COMMERCIAL subarea type Runoff Coefficient = 0.878 Decimal fraction soil group A = 0.000 Decimal fraction soil group B = 1.000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil(AMC 2) = 56.00 Pervious area fraction = 0.100; Impervious fraction = 0.900 Initial subarea runoff = 4.773(CFS) Total initial stream area = 1.670(Ac.) Pervious area fraction = 0.100 B-2 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 202.000 to Point/Station 202.000 **** CONFLUENCE OF MINOR STREAMS **** Along Main Stream number: 1 in normal stream number 2 Stream flow area = 1.670(Ac.) Runoff from this stream = 4.773(CFSl Time of concentration = 11.31 min. Rainfall intensity = 3.255(In/Hr) Summary of stream data: Stream No. Flow rate (CFS) TC (min) Rainfall Intensity (In/Hr) 1 2 Largest Qp= 8.830 10.73 4.773 11.31 stream flow has longer or 8.830 + sum of Qa Tb/Ta 4.773 * 0.949 = 13.359 3.350 3.255 shorter time of concentration 4,529 Qp = Total of 2 streams to confluence: Flow rates before confluence point: 8.830 4.773 Area of streams before confluence: 3.000 1.670 Results of confluence: Total flow rate = 13.359(CFSl Time of concentration = 10.732 min. Effective stream area after confluence = End of computations, total study area = The following figures may be used for a unit hydrograph study of the 4.670 (Ac.) 7.90 (Ac.) same area. Area averaged pervious area fraction(Ap) = Area averaged RI index number = 56.0 0.100 \'\ I I I I I I I I I I II ! I I I I I I I I 1'1 Riverside County Rational Hydrology Program CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989 - 1998 Version 5.1 Rational Hydrology Study Date: 04/05/01 File:P627CB.out PM 28627 CATCH BASIN HYDROLOGY ANALYSIS 100 YEAR STORM IN 26003 ********* Hydrology Study Control Information ********** English (in-lb) Units used in input data file Lohr + Associates, Inc., Temecula, California - SIN 773 Rational Method Hydrology Program based on Riverside County Flood Control & Water Conservation District 1978 hydrology manual Storm event (year) = 100,00 Antecedent Moisture Condition = 2 Standard intensity-duration curves data (Plate D-4.1) For the [ Murrieta,Tmc,Rnch CaNorco ] area used. 10 year storm 10 minute intensity = 2,360(In/Hr) 10 year storm 60 minute intensity = O,880(In/Hr) 100 year storm 10 minute intensity = 3.480(In/Hr) 100 year storm 60 minute intensity = l,300(In/Hr) Storm event year = 100.0 Calculated rainfall intensity data: 1 hour intensity = l,300(In/Hr) Slope of intensity duration curve = 0,5500 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 100,000 to point/Station 101.000 **** INITIAL AREA EVALUATION **** Initial area flow distance = 930.000(Ft.) Top (of initial area) elevation = 1014.000(Ft.) Bottom (of initial area) elevation = 995.300(Ft.) Difference in elevation = 18.700(Ft.) Slope = 0.02011 s(percent) = 2.01 TC = k(O,390)*[(lengthA3)/(elevation change)] AO.2 Initial area time of concentration = 13.116 min. Rainfall intensity = 3.000(In/Hr) for a 100.0 year storm SINGLE FAMILY (1/4 Acre Lot) Runoff Coefficient = 0.784 Decimal fraction soil group A = 0.000 C 8 ,I Decimal fraction soil group B = 1.000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil(AMC 2) = 56.00 Pervious area fraction = 0,500; Impervious fraction = 0.500 ~ I I I I I I I I I I I I I I I I II I I 20 Initial subarea runoff = Total initial stream area = Pervious area fraction = 0.500 6.864(CFS) 2.920 (AC.) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 101.000 to Point/Station 102.000 **** STREET FLOW TRAVEL TIME + SUBAREA FLOW ADDITION **** TOp of street segment elevation = 995.300(Ft.) End of street segment elevation = 994.000(Ft.) Length of street segment = 255.000(Ft.) Height of curb above gutter flowline = 6.0{In.) Width of half street (curb to crown) = 39.000(Ft.) Distance from crown to crossfall grade break = 37.000(Ft.) Slope from gutter to grade break (v/hz) = 0.080 Slope from grade break to crown (v/hz) = 0.020 Street flow is on [1] side(s) of the street Distance from curb to property line = 5,OOO(Ft.l Slope from curb to property line (v/hz) = 0.020 Gutter width = 2.000(Ft.) Gutter hike from flowline = 1.920(In.) Manning's N in gutter = 0,0150 Manning's N from gutter to grade break = 0.0150 Manning's N from grade break to crown = 0.0150 Estimated mean flow rate at midpoint of street = 7.840(CFS) Depth of flow = 0.484(Ft.), Average velocity = 2.285(Ft/s) Streetflow hydraulics at midpoint of street travel: Halfstreet flow width = 18.197 (Ft. ) C 13 - 2 Flow velocity = 2.28(Ft/s) Travel time = 1.86 min. TC = 14.98 min. Adding area flow to street COMMERCIAL subarea type Runoff Coefficient = 0.875 Decimal fraction soil group A = 0.000 Decimal fraction soil group B = 1.000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil(AMC 2) = 56.00 Pervious area fraction = 0.100; Impervious fraction = 0.900 Rainfall intensity = 2.789(In/Hr) for a 100,0 year storm Subarea runoff = 2.027(CFS) for 0.830(Ac.) Total runoff = 8.891(CFS) Total area = 3.750(Ac.) Street flow at end of street = 8.891(CFS) Half street flow at end of street = 8.891(CFS) Depth of .flow = 0,503 (Ft.), Average velocity = 2.348 (Ft/s) Warning: depth of flow exceeds top of curb Distance that curb overflow reaches into property = O,15(Ft.) Flow width (from curb towards crown)= 19.150(Ft.) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 102.000 to Point/Station 102.000 **** CONFLUENCE OF MAIN STREAMS **** The following data inside Main Stream is listed: In Main Stream number: 1 Stream flow area = 3,750(Ac.) Runoff from this stream = 8.891(CFS) Time of concentration = 14.98 min. 2.\ I I I I I I I I I I I I I I I I I I I ZI Rainfall intensity = 2.789(In/Hr) Program is now starting with Main Stream No. 2 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 103.000 to Point/Station 106.000 **** INITIAL AREA EVALUATION **** Initial area flow distance = 570.000(Ft,) Top (of initial area) elevation = 1002.200(Ft.) Bottom (of initial area) elevation = 994.400(Ft.) Difference in elevation = 7.800(Ft.) Slope = 0.01368 s(percent) = 1.37 TC = k(0.300)*[(length~3)/(elevation change)]~0.2 Initial area time of concentration = 8.958 min. Rainfall intensity = 3.700(In/Hr) for a 100.0 year storm COMMERCIAL subarea type Runoff Coefficient = 0.880 CB- 3 Decimal fraction soil group A = 0.000 Decimal fraction soil group B = 1.000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil(AMC 2) = 56.00 Pervious area fraction = 0,100; Impervious fraction = 0.900 Initial subarea runoff = 4.266(CFS) Total initial stream area = 1.310(Ac,) Pervious area fraction = 0,100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 106.000 to Point/Station 106.000 **** CONFLUENCE OF MINOR STREAMS **** Along Main Stream number: 2 in normal stream number 1 Stream flow area = 1.310(AC.) Runoff from this stream = 4.266(CFS) Time of concentration = 8.96 min. Rainfall intensity = 3.700(In/Hr) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 104.000 to Point/Station 105.000 **** INITIAL AREA EVALUATION **** Initial area flow distance = 260.000(Ft.) Top (of initial area) elevation = 998.600(Ft.) Bottom (of initial area) elevation = 996.800(Ft.) Difference in elevation = 1.800(Ft.) Slope = 0.00692 s(percent) = 0.69 TC = k(O,300)*[(length~3)/(elevation change)]~0.2 Initial area time of concentration = 7.500 min. Rainfall intensity = 4.080(In/Hr) for a 100.0 year storm COMMERCIAL subarea type Runoff Coefficient = 0.882 Decimal fraction soil group A = 0.000 (! B - 4 Decimal fraction soil group B = 1.000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil(AMC 2) = 56.00 Pervious area fraction = 0.100; Impervious fraction = 0.900 ~ I I I I I I I I I I I I I I I I I I I zz Initial subarea runoff = Total initial stream area = Pervious area fraction = 0.100 2,302(CFS) o . 640 (Ac. ) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 105.000 to Point/Station 106.000 **** STREET FLOW TRAVEL TIME + SUBAREA FLOW ADDITION **** Top of street segment elevation = 995.400(Ft.) End of street segment elevation = 994.400(Ft.) Length of street segment = 190,OOO(Ft,) Height of curb above gutter flowline = 6.0(In.) Width of half street (curb to crown) = 28.000(Ft.) Distance from crown to crossfall grade break = 26.000(Ft.) Slope from gutter to grade break (v/hz) = 0.080 Slope from grade break to crown (v/hz) = 0.020 Street flow is on [1] side(s) of the street Distance from curb to property line = 11.000(Ft.) Slope from curb to property line (v/hz) = 0.020 Gutter width = 2.000(Ft,) Gutter hike from flowline = 1.920(In.) Manning's N in gutter = 0.0150 Manning's N from gutter to grade break = 0.0150 Manning's N from grade break to crown = 0.0150 Estimated mean flow rate at midpoint of street = 2.662(CFS) Depth of flow = 0.354(Ft.), Average velocity = 1.783(Ft/s) Streetflow hydraulics at midpoint of street travel: Halfstreet flow width = 1l.716(Ft.) C'13-5 Flow velocity = 1.78(Ft/s) Travel time = 1,78 min. TC = 9,28 min. Adding area flow to street COMMERCIAL subarea type Runoff Coefficient = 0,880 Decimal fraction soil group A = 0.000 Decimal fraction soil group B = 1,000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil(AMC 2) = 56.00 Pervious area fraction = 0,100; Impervious fraction = 0.900 Rainfall intensity = 3.630(In/Hr) for a 100.0 year storm Subarea runoff O,639(CFS) for O,200(Ac.) Total runoff = 2.94l(CFS) Total area = 0.840(Ac.) Street flow at end of street = 2.941(CFS) Half street flow at end of street = 2.94l(CFS) Depth of flow = 0.364(Ft.), Average velocity = 1.826(Ft/s) Flow width (from curb towards crown)= 12.210(Ft.) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 106.000 to Point/Station 106.000 **** CONFLUENCE OF MINOR STREAMS **** Along Main Stream number: 2 in normal stream number 2 Stream flow area = 0.840(Ac.) Runoff from this stream = 2.941(CFS) Time of concentration = 9,28 min. Rainfall intensity = 3.630(In/Hr) Summary of stream data: t:b Total of 2 streams to confluence: Flow rates before confluence point: 4.266 2.941 Area of streams before confluence: 1.310 0.840 Results of confluence: Total flow rate = Time of concentration Effective stream area I I I I I I I I I I I I I I I I I I I Stream No. 1 2 Largest Qp = Qp = 23 Flow rate (CFS) TC (min) Rainfall Intensity (In/Hr) 4.266 8,96 2.941 9.28 stream flow has longer or 4.266 + sum of Qa Tb/Ta 2.941 * 0.966 = 7.106 3.700 3,630 shorter time of concentration 2.840 7.106(CFS) = 8.958 min. after confluence = 2.150 (Ac,) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from point/Station 106.000 to Point/Station 106.000 **** CONFLUENCE OF MAIN STREAMS **** The following data inside Main Stream is listed: In Main Stream number: 2 Stream flow area = 2.150(Ac.) Runoff from this stream = 7.106(CFSl Time of concentration = 8,96 min. Rainfall intensity = 3.700(In/Hr) Summary of stream data: Stream No. 1 2 Largest Qp = Qp = Flow rate (CFS) Rainfall Intensity (In/Hr) TC (min) 8.891 14.98 7.106 8.96 stream flow has longer 8.891 + sum of Qb Ia/Ib 7.106 * 0.754 = 14.247 2,789 3.700 time of concentration 5.357 Total of 2 main streams to confluence: Flow rates before confluence point: 8.891 7.106 Area of streams before confluence: 3,750 2.150 Results of confluence: Total flow rate = 14.247(CFS) Time of concentration = 14.976 min. Effective stream area after confluence = 5.900 (Ac.) ']A I I I I I I I I I I I I I I I I I I I 14 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from point/Station 102.000 to point/Station 102,000 **** CONFLUENCE OF MINOR STREAMS **** Along Main Stream number: 1 in normal stream number 1 Stream flow area = 5.900(AC.} Runoff from this stream = 14.247(CFS) Time of concentration = 14.98 min. Rainfall intensity = 2.789(In/Hr) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from point/Station 107.000 to point/Station 102.000 **** INITIAL AREA EVALUATION **** Initial area flow distance = 220,OOO(Ft.) Top (of initial area) elevation = 999.000(Ft.} Bottom (of initial area) elevation = 994.000(Ft.) Difference in elevation = 5.000(Ft.) Slope = 0.02273 s(percent) = 2.27 TC = k(O.300)*[(length~3)/(elevation change)]~0.2 Initial area time of concentration = 5.531 min. Rainfall intensity = 4,824(In/Hr) for a 100.0 year storm COMMERCIAL subarea type Runoff Coefficient = 0.884 C5-<:' Decimal fraction soil group A = 0.000 Decimal fraction soil group B = 1.000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil(AMC 2} = 56.00 Pervious area fraction = 0.100; Impervious fraction = 0.900 Initial subarea runoff = l.876(CFS) Total initial stream area = 0.440(Ac.) Pervious area fraction = 0.100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 102.000 to Point/Station 102.000 **** CONFLUENCE OF MINOR STREAMS **** Along Main Stream number: 1 in normal stream number 2 Stream flow area = 0.440(Ac.) Runoff from this stream = 1.876(CFS) Time of concentration = 5.53 min. Rainfall intensity = 4.824 (In/Hr) Summary of stream data: Stream No. Flow rate (CFS) TC (min) Rainfall Intensity (In/Hr) 1 2 Largest Qp = 14.247 14.98 1.876 5.53 stream flow has longer 14.247 + sum of Qb Ia/Ib 1.876 * 0.578 = 15.332 2.789 4.824 time of concentration 1. 085 Qp= Total of 2 streams to confluence: w I I I I I I I I I I I I I I I I I I I 25 Flow rates before confluence point: 14.247 1.876 Area of streams before confluence: 5.900 0.440 Results of confluence: Total flow rate = 15.332(CFS) Time of concentration = 14.976 min, Effective stream area after confluence = 6.340 (Ac.) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 102.000 to Point/Station 102.000 **** CONFLUENCE OF MINOR STREAMS **** Along Main Stream number: 1 in normal stream number 1 Stream flow area = 6.340(Ac.) Runoff from this stream = 15.332 (CFS) Time of concentration = 14.98 min. Rainfall intensity = 2.789(In/Hr) ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 108.000 to Point/Station 109.000 **** INITIAL AREA EVALUATION **** Initial area flow distance = 400.000(Ft.) Top (of initial area) elevation = 998.500(Ft.) Bottom (of initial area) elevation = 995.300(Ft.l Difference in elevation = 3.200(Ft.) Slope = 0.00800 s (percent) = 0.80 TC = k(0.300)*[(length~3)/(elevation change)]~0.2 Initial area time of concentration = 8.656 min. Rainfall intensity = 3.770(In/Hr) for a 100.0 year storm COMMERCIAL subarea type Runoff Coefficient = 0.880 <:::6-7 Decimal fraction soil group A = 0.000 Decimal fraction soil group B = 1.000 Decimal fraction soil group C = 0.000 Decimal fraction soil group D = 0.000 RI index for soil(AMC 2) = 56.00 Pervious area fraction = 0.100; Impervious fraction = 0.900 Initial subarea runoff = 3.585(CFS) Total initial stream area = 1.080(Ac.) Pervious area fraction = 0.100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 109.000 to Point/Station 109.000 **** CONFLUENCE OF MINOR STREAMS **** Along Main Stream number: 1 in normal stream number 2 Stream flow area = 1.080(Ac.) Runoff from this stream = 3.585(CFS) Time of concentration = 8.66 min. Rainfall intensity = 3.770(In/Hr) Summary of stream data: Stream No. Flow rate (CFS) TC (min) Rainfall Intensity ( In/Hrl ')/I? I I I I I I I I I I I I I I I I I I I 'Z~ Qp = 15.332 14.98 3.585 8.66 stream flow has longer 15.332 + sum of Qb Ia/lb 3.585 * 0,740 = 17.984 2.789 3.770 time of concentration 1 2 Largest Qp = 2.652 Total of 2 streams to confluence: Flow rates before confluence point: 15.332 3.585 Area of streams before confluence: 6.340 1.080 Results of confluence: Total flow rate = 17.984(CFS) Time of concentration = 14.976 min. Effective stream area after confluence = End of computations, total study area = The following figures may be used for a unit hydrograph study of the 7.420 (Ac,) 7.42 (Ac.) same area. Area averaged pervious area fraction (Ap) = Area averaged RI index number = 56.0 0.257 2,.1 I I I I I I I I I I . I I I I I I I I LOHR + ASSOCIATES INC. fM '28' '27 43513 RIDGE PARK DRIVE TEMECULA, CA 92590 PH. 9lJ9..67~ FAX 9lJ9..699.0896 . LAND PlANNING. CIVIL ENGINEERING. SURVEYING JOB No, BY DATE SHT. OF 2' <><> ~ I1't;:~MIfN +/$101 '2.7 €k./~T. c.8. @ ~/II, q~..,.c '.'3 ftJ tJ)lH7I!NtI,/ <6y/"!I'S-:> ' !Q,o,,= /'7.3?J CF~ /' . EXI~i c.: 7 ~ g C.F. & .. 8.0 )( o. (,7 ftJl.13. OO.Go /'7,33 .., ~.o,,~.e.1~ 71./3 D~,(' ~ I , v.. (J.7(, <:. (J, (.7 +". (0... (J.17 tbk' ,..'b I I . . . . . I I I I I I I I I I . I i'ot:f. 8~ I I I I I I I I I I I I I I I I I I I 2'1 T1 PM 28627 EXIST. 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