Loading...
HomeMy WebLinkAboutCT 99-03; VILLAGES OF LA COSTA GREENS; MASS-GRADED HYDROLOGY STUDY; 2005-08-23- --.. -.. -- --.. .. -- • PLANNING ENGINEERING SURVEYING IRVINE LOS ANGELES RIVERSIDE SAN DIEGO HUNSAKER &ASSOCIATES S A N D I E G 0, I N C . MASS-GRADED HYDROLOGY STUDY ·for LA COSTA GREE~S NEIGHBORHOODS 1. 1-1.3 & EL CAMINO REAL WIDENING City of Carlsbad, California Prepared for: Real Estate Collateral Management Company c/o Morrow Development 1903 Wright Place Suite 180 Carlsbad, CA 92008 ·:o v1,c£.1% . W.O. 2352-138 . , • ·,uu~ {)..\\ti l_ ~ • a1R\\-1G a,lG\~ dt'~t:.~ r August23,2005 ¢.P~· Hunsaker & Associates San Diego, Inc . DAVE HAMMAR • AUS~~~~~:~~ \ ,//~ DAN SMITH T ~ ~ RAYMARTIN _,,____,,_..___.__._._ __ -.,....~~~ ......... ------ a ond L. Martin, R.C.E. Vice President Cl..} le ~-~ ... -:....i • . ~)- 2 10179 HuennekensSt San Diego, CA 92121 (858) 558-4500 PH (858) 558-1414 FX www.HunsakerSO.com CT ufq-03<t f} ]e1fq ..J AH:kc H:IREPORTS\23~\138 Greens 1.1 lhrv 1.3\3rtl SUBMITTAL\A03.doc Q. 1 j lnfo@HunsakerSD.com W.O.2352-138 8~~512:20PM - --- - •• •• - --- **************************************************************************** FLOW PROCESS FROM NODE 107.00 TO NODE 107.00 IS CODE= 1 >>>>>DESIGNATE· INDEPENDENT STREAM FOR CONFLUENCE<<<<< ------------.--------------------------------------------------------------- TOTAL NUMBER OF STREAMS= 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: TIME OF CONCENTRATION{MIN.) 9.08 RAINFALL INTENSITY(INCH/.HR) = 5.02 TOTAL STREAM AREA(ACRES) ~ 1.86 PEAK FLOW RATE(CFS) AT CONFLUENCE= 6.84 **************************************************************************** FLOW PROCESS FROM NODE 108. 00 TO NODE 109.00 IS CODE= 21 >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< ==-==-==-===-=============================================================== *USER SPECIFIED(SUBAREA): INDUSTRIAL DEVELOPMENT RUNOFF COEFFICIENT= .9000 INJTIAL SUBAREA FLOW-LENGTH= UPSTREAM ELEVATION= DOWNSTREAM ELEVATION= 314.80 310.00 ELEVATIO~ DIFFERENCE= 4.80 314.00 URBAN SUBAREA OVERLAND TIME OF FLOW (MINUTES) 5 . 53 8 TIME.OF CONCENTRATION ASSUMED AS 6-MINUTES 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 6.559 SUBAREA RUNOFF(CFS) = 2.30 TOTAL AREA(ACRES} = 0.39 TOTAL RUNOFF (CFS} 2 .30 * *** * * * ** ***** *** ***** * ** ** * **** ** ****** ********** ** * ****** **** *.** ** * ******* FLOW PROCESS FROM NODE 109. 00 TO NODE >>>>>COMPU'l'.E TRAPEZOIDAL CHANNEL FLOW<<<<< >>>>>TRAVELTIME THRU SUBAREA<<<<< 110.00 IS CODE= 51 .--------------------------------=--~-.-=-=~--=--==--=---------=--=--=------- UPSTREAM NODE ELEVATION= 310.00 DOWNSTREAM NODE ELEVATION= 301.70 CHANNEL LENGTH THRU SUBAREA(FEET) = 633.50 CHANNEL SLOPE= 0.0131 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR= 99.990 MANNING'S FACTOR= 0.030 MAXIMUM DEPTH(FEET) = 0.50 CHANNEL FLOW THRU SUBAREA(CFS) = 2.30 FLOW VELOCITY(FEET/SEC) = 1.03 FLOW DEPTH(FEET} = 0.15 TRAVEL TIME(MIN.} = 10.28 TC(MIN.) = 16.28 -**************************************************************************** -.. .. FLOW PROCESS FROM NODE 109.00 TO NODE 110.00 IS CODE= 8 -----------------. ------------------------------------.--------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<< --=============~============================================================ 100 YEAR RAINFALL INTENSITY(INCH/HOUR} = 3.445 *USER SPECIFIED(SUBAREA}: INDUSTRIAL DEVELOPMENT RUNOFF COEFFICIENT= .8700 SUBAREA AREA (ACRES) = 9. 8 8 Su.aAREA RUNOFF (CFS) = 2.9. 61 - -- ~ - •• 111( -!":z ·:::;., _,.,. [f ·:~;!:~ ~{:; .·,·, ~:--;~~--~. . . -· .. ' -· •• TOTAL AREA{ACRES) = TC(MIN) = 16-.28 10.27 TOTAL RUNOFF(CFS) = 31.91 **************************************************************************** FLOW PROCESS FROM NODE 110.00 TO NODE 111.00 IS CODE= >>>>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< >>>>>USING USER-SPECIFIED PIPESIZE<<<<< 4 =================================================-=-=======--=----.--------- DEPTH OF FLOW IN 30.0 INCH PIPE IS 11.5 INCHE$ PIPEFLOW VELOCITY(FEET/SEC.) = 18.4 UPSTREAM NODE ELEVATION= 290.68 DOWNSTREAM NODE ELEVATION= FLOWLENGTH(FEET) = 65.00 GIVEN PIPE DIAMETER(INCH) = PIPEFLOW THRU SUBAREA(CFS) = TRAVEL TIME (MIN.) = 0. 06 286;22 MANNING'S N = .0.013 30.00 NUMBER OF-PIPES= 31.91 TC(MIN.) = ·16.34 1 **************************************************************************** FLOW PROCESS FROM NODE , .111. 00 TO NODE 113.00 IS CODE= 4 --.•. :-----.--------------------------------------------------------------- >>>>>COMPUTE PIPEFLOW TRAVELTIME THRU SUBAREA<<<<< >>>>>USING USER-SPECIFIED PIPESIZE<<<<< ------------------------------------------------------------------------.--- DEPTH OF'FLOW IN 30.0 INCH PIPE IS 8.8 INCHES PIPEFLOW VELOCITY{FEET/SEC.) = 26.8 UPSTREAM NODE ELEVATION= 285.89 DOWNSTREAM NODE ELEVATION= FLOWLENGTH{FEET) = 48.78 GIVEN PIPE DIAMETER(INCH) = PIPEFLOW nm,u SUBAREA{CFS) = TRAVEL TIME(MIN.) = 0.03 276.38 MANNING'S N = 0.013 30.00 NUMBER OF PIPES= 31.91 TC{MIN.) = 16.37 1 **************************************************************************** FLOW PROCESS FROM NODE 113.00 TO NODE 107. 00 IS CODE = 53 >>>>>COMPUTE NATURAL MOUNTAIN CHANNEL FLOW<<<<< •-·· >>>>>TRAVELTIME THRU SUBAREA<<<<< ---~ ~==.:=======================================---------=---------------- UPSTREAM NODE ELEVATION= 275.00 DOWNSTREAM NODE ELEVATION= 224.00 GHANNEL LENGTH THRU SUBAREA(FEET) = 302.00 ·CHANNEL SLOPE= 0.1689 CHANNEL FLOW THRU SUBAR.EA{CFS) = 31.91 FLOW VELOCITY(FEET/SEC) = 7.29 {PER PLATE D-6.3) ~RAVEL TIME(MIN.) =· 0.69 TC(MIN.) = 17.06 **************************************************************************** FLOW PROCESS FROM NODE 113.00 TO NODE 107.00 IS CODE= 8 ----------· ------------------------------------.----------------------- ?>>>>ADDITION OF SUBAREA TO MAINLINE PE..ZU< FLOW<<<<< ==================================================· =========·=====·====·==== 100 YEAR RAINFALL INTENSITY(INCH/HOUR) = 3.343 - -- ... -1 - - - - -• - - - --- *USER SPECIFIED(SUBAREA): RURAL DEVELOPMENT RUNOFF COEFFICIENT= .4700 SUBAREA ARRA(ACRES) = 1.54 SUBAREA RUNOFF(CFS) = 2.42 TOTAL AREA(ACRES) = 11.81. TOTAL RUNOFF(CFS) = 34.33 TC(MIN) = 17.06 **************************************************************************** FLOW PROCESS FROM NODE 107.00 TO NODE 107.00 IS CODE= >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<< >>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< 1 ====--==--==-===-===--==-================================================-== TOTAL NUMBER OF STREAMS= 2 CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: TIME OF CONCENTRATION(MIN.) = 17.06 RAINFALL INTENSITY(INCH/HR) = 3.34 TOTAL STREAM AREA(ACRES) = 11.81 PEAK FLOW RATE(CFS) AT CONFLUENCE= 34.33 ** CONFLUENCE DATA ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) ( INCH/HOUR) 1 6.84 9.08 5.022 2 .34.33 17.06 3.343 AREA (ACRE) 1.86 11. 81 RAINFALL INTENSITY AND TIME OF CONCENTRATION.RATIO CONFLUENCE FORMULA USED FOR 2 STREAMS. ** PEAK FLOW RATE TABLE ** STREAM RUNOFF Tc INTENSITY NUMBER (CFS) (MIN.) ( INCH/HOUR) 1 29. 70 9.08 5.022 2 38.89 17.06 3.343 COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:. PEAK FLOW RA,TE(CFS) = 38.89 Tc(MIN.) = 17.06 TOTAL AREA(ACRES) = 13.67 **********************************************"****************************** FLOW PROCESS FROM NODE 107.00 TO NODE 114.00 IS CODE= 52 -------------·---------------------------------------------------------• ___ _ >>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<< >>>>>TRAVELTIME THRU SUBAREA<<<<< ==-===-==== ·=========================·================·===================== -UPSTREAM NODE ELEVATION= 224.00 DOWNSTREAM NODE ELEVATION= 125.00 CHANNEL LENGTH THRU SUBAREA(FEET). 1587.00 CHANNEL SLOPE= 0.0624 CHANNEL FLOW THRU SUBAREA(CFS) = 38.89 FLOW VELOCITY(FEET/SEC) = 9.00 (PER PLATE D-6.1) TRAVEL TIME(MIN.) = 2.94 TC(MIN.) = 20.00 -***************************************************~************************ FLOW PROCESS FROM NODE 107.-00 TO NODE 114.00 IS CODE= 8 --- £LEV. rACTOR ·0-f!i00 LOO ~-0.0'-.300Q. 1.2~ 3000-◄000 1.42 -1 ooo-~ooo 1.60 !1000-6000 1.70 DESERT 1.25 To obtuin corrtct lntt1u1tr, multiply lnhnal1y on chort ():) w by toctor tor dulvn 11,vo'tlon. -z .''),, -f fTI n ~ 0 (/) C -i :z: -< -f 0 I -< ..._ C ~,~ 0 0 C: 'll lfl'l ::0 (/) 'ti) l> -f )), -z 0 g z )> I "O n, ,, ' "lJ Ci) ::0 n, 0 fT1 z 0 CJ C 'V' Pl !AL rr:f~ i.rr: I{, '. ' " I ::0 p -,z ~ r r ,,r., I I .1 .. I, I'? I, I. I I I D URATI.O N M l·N UT ES · IO ,. 2 0 30 4 O ~ o· · I. I ' • ,t •Ir• t ":I • . I .. ' ' ) r ...... •' I I' . HOU RS 2 , . . 4 ~ O 7 0 9 10 MINUTES. HOURS. DURATION ·•.' LEGEND PROJECT BOUNDARY EXISTING HCP LINE \VATERSHED BNDY DRAINAGE DIRECTION - LOCATION 10 NODE 0 DITCH ID NODE [TI EXISTING STOR~vl DRAIN PROPOSED STORM DRAIN j:,9J EXISTING DITCH PROPOSED _DITCH. 0 0 0 100 200 300 SCALE 1 "= 100 ' _,;_,,...~, ''"-;;"'' r; ,, . _, ,,,• -·-- / ,/ a, . \ ·, ) i/ ,. I / : i H&A ( f i PREPARED BY: f'LA.l\,IN!NC ENGINttR!NG SUil:'VEY!NC HUNSAKER & ASSOCIATES S 1\ N D ! E G O, IN C 10179 Huemekens Street San Diego, Ca sz;21 PH!858)5S8-4500· FX(858)556-14H MASS-GRADED HYDROLOGY MAP FOR SHEET 1 OF CITY OF CARLSBAD, CALIFORNIA 2 R: \0510\&Hyd\0510$'!02-MG100.dwg[ O]Aug-22-2005: 15: 32