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HomeMy WebLinkAboutCT 89-22; BAYWALK; PRELIMINARY HYDROLOGY STUDY; 1989-09-22ffl 7656 State Strirnt Carl1bad, Calif. 92008 729-8981 BRIAN SMITH ENGINEERS, INC. Cirii/ l:ngirwwin,r. and Surllf!11ing ~ _!b_.....,=---'---· CALC~!Jt-'flON~ ~ -~~-r: .'1-b ~-\-⇒--k ~e ----· -=--""--+---+,..:-..:::..:::.::::.::::.:::::::::::::::===:;,-1 PREL/fv1JAIARY .bt(t?r?/2\PG,'( 5T.£.1!2'f _FOf2._ 212_ UkUT Co~l'JOS ~IJ~IZISOM s T. -~~\?AO. CA-~ , SEP 2 7 1989 • CITY OF CARLSBAD DEVELOP. PROC.. SERV .. DIV .. FH:IAl'J './/.,Ill I:v~:t!L!·1<'.i, INC.. ~'{,·.11 '.,l(Jl,J :,~rt:ol l.<JI I· l ,wJ, Lul,I. 9,:•_,01, 71-J--ffl ~l HATJONAL l\lFTllOD M,•thod of Conir)utirw Hunoff ·--------~----.:I.:----~.-------~ Utw the H1111un11I Forrnulu Q ::: CIA wtwrc: g_ is the peuk rule of flow in cul.lie feet per becorH.I. C is a runoff coeffic-it>nl exprct:.::;ed 6S thut perce11tu~e of rainfoll which l)ecomes oudaee runoff. .. I ib the uvl'ruKf~ rtJlllfall inte111:,ity in irll'hcs per tiuur for tt storm ~lurution equu1 to ttIc t1111e of co11centrut10n ( 'f ) of !he contributing C ,lrHinug-e ,1rc-11. A is the drttinoge t1reu in acres tributary to desirrn point. (1) Runoff COl~fficient, C ----------·-------- Appendix I-A lisll:l the Ctitimuted coeffic.:ients for urban oreu6. For urbun are11~ .select on approprilile coefficient fur each type of Jund use fron, THhlt.>, 2, Appendix J-A. Multtply ttlb c·oeffle1en1 by thti pen·cnthl{l! of tht~ tulol ureH tncludeli 111 thut cltt::,1:L The sum of the prc><.IUcl~ lor u11 }and use6 in :::iun Diego Couraty u, the we11,{tlled runoff eocfficaent. (2) Huirtfull lr1tcnHitv. I ._ ____________ ---·---------~ Intensity -durution -frl·qucncv eurvf•s upplieHtile to all orcut. within Sun DteKo County un· t{iven 1n Appendix 1-1.L The t1111,• of conce11tratio11 it> lhe trnw required for runoff to flow from ll1e most rt!111otc purl of the wut~rshel1 to the outlet po1r1t under con!>tderotion. I BRIAN SMITH ENGINEERS, INC. CONSUL TING ENGINEERS AND PLAN Ne! BY ____ DATE ____ CLIENT _LI ________ SHEET NO. ___ Qf_ CHECKED ____ DATE ____ JO! I • I . I -·- I I I I l-1 : . . I I !-• ! T I ' ! : 'H?e O,E.?v/32C>P/t,,,/.c.=-~ WD.liVL06 Y I I I I ! I I . ·-·---.. -· -I I I I i I I ---1-------1- I I (j) /I - PROJECT /k-J:k1:Jx/ WO=lt ~:P->-/ SHT ___ OF __ Cl\LC __ Dl\TE __ CHKD DI\ TE STATION ________ --'J\REA Rf.FERENCE 01-14 □" . 057 (SO scale) ARFA X . 918 (200 scale) = /; c;-___._ ____ _ ACRES 91.8 (2000) COEFFICIENT OF RUNOFF: C (consider probable development) Developed Areas (1}_rba.EJ % La,nd Use Residential: /00 Single Family Multi-Units --- Mobile Homes --- ---Rural (lots greater than 1/2 acre) ---Commercial (2) . 80% Impetvlous ___ Industrial (2) 90% Impervious TIME OF CONCENTAATION TC (Chart B-1) Hi.Pt.___ H. __ _ Lo.Pt. __ _ RTJNQFF; Q -I X cp.. L. __ _ Tc ... __ mtn __ hr .(-~. minimum) Altitude Factor• ____ {Chart C) fl .40 .45 .45 .30 .70 .80 Coefficient II C 11 Soi.l Type ( 1) B C .45 .SO .so .60 .so .55 .35 .40 .75 . 80 .85 .90 Tc -01. ~(L3:i/85 Tr::= Time in Hours L== Distance in Miles H= Height in Feet USE Q_ = USE 01 oo= '--.if: 0 Reference: San Diego County Flood Control Design and Procedure Manual (1) 0 btain soil type from Append toes IX-C 1 thru IX-C4 D @ . 70 = . 65 = .45 = .85 = . 95 = --- C ::: , 0.S­ CA =0,)32- CFS CFS PROJECT /tkY?-C:V--. /" WO# ~sos= SHT OF ------CALC __ lll\.TE __ CHKD :o.n.TE_ STATION ________ --'AREA REFERENCE 0.BB □" . 05 7 (SO sea le) ARFA ______ X .918 (200 scale) ""_(t.J.o ___ ACRES 91.8 (2000) COEFFICIENT OF RUNOFF; C (consider probable development) Developed Areas (Url]_~l!} % ]And Use Residential: /OC> Single Family Multi-Units --- Mobile Homes --- ---Rw-al (lots greater than 1/2 acre) ---Cornmerctal (2) 80% Impervious ---Industrial (2) 90% Impervious IIME Q[ QQNCENT~TIQN TQ (Chart B-1} Hi.Pt.___ H. __ _ Lo.Pt. __ _ RUNOFF; Q • I x gA L. --- TC == __ min __ hr HO n,h,.. minimum) SM/1/ Altitude Factor • (Chart C) ---- Coefficient " C " Soll Type ( 1) A 8 C .40 .45 .50 .45 .50 . 60 .45 .50 .55 .30 .35 .40 .70 .75 . 80 .80 .85 .90 Tc= ~l.~{L3iyBs T~= Time in Hours L• Distance in Miles H= Height in Feet D 03} . 70 = . 65 = .45 = .85 = .95 = --- c = ,SS­ CA ==(?,33 I • __ x __ "/hr __ cfe -factor x0,33• USE Q_ = ____ CFS 1100-_/ xG-!3-S-"/hr CA ?-2ro cfs USE 01 oo= 2~ 3 Reference: San Otego County Flood Control Design and Procedure Manua-1 (1) 'Obtain soJl type from Appendices [X-C 1 thru tX-C4 CFS II I I - PROJECT ___________ _ WOi _______ SHT ___ or_ CALC __ DATE CHKD DI\TE_ Oc ,,,,-;' STATION __________ ARF.A REFERENCE _____ t__./_ □" . 05 7 (50 scale) _ ARFA X . 918 (2 00 scale) = C>,, z_._ ACRES ------91. 8 (2000) yOEFFICIENT OF RUNOFF; C (consider probable development) Developed Arfill_l!I (Urban) Residential: /C>O S.tngle Family Multi-Units --- Mobile Homes --- ---Rural (lots greater than 1/2 acre) ___ Commercial (2) 80% Impervious ---Industrial (2) 90% Impetvious TIME Q!..Q.QNCENTRATION TC (Chart B-1) Hi.Pt.___ H. __ _ Lo.Pt. --- R.'Q.NQFP; Q -I X QJ\.. L. __ _ Tc.., min hr ----(+e 111111. minimum) 5M/-'/ Altitude Factor• ____ (Ch.art C) Coe'fficient " C " Soil Type ( 1) fl B C .40 .45 .so .45 .50 .60 .45 .50 .55 .30 .35 . 40 .70 .75 . 80 .80 .85 .90 Tc= 01.~(L3~85 Ti::= Time in Hours L= Distance in Miles H= Height in Feet Q @ . 70 = . 65 = .45 = .85 = . 95 = I_ • __ x __ "/hr __ cfs factor ~-/ I • USE Q_ = ____ CFS 1100 =-/ x6,,35" "/hr CA 0. /~fs USE O1oo= 0,, 7 CFS Reference: San Diego County Flood Control Design and Procedure Manua-1 (1) Obtain soi.l type from Appendices IX-C 1 thru IX-C4 --- (f) BRIAN SMITH ENGINEERS, INC. CONSUL l"ING ENGtNE.ERS AND PLANNE f·H::I BY ____ DATE ____ CI..I 1:NT __ j/ ~):t,J;:;'}::-/.;__ _______ SI-IEl;T NO. ___ OF_ CHECKED ____ DATE ____ .1011 --------------JOB N~/ I· ' I. I , I I i I . ---·-·· ···-•-1-···· ••• -· ----, ! I : , I ----j---1-,-·-·---·-·· •••• .:. I j ! I I i i ! ' PO-ST OEVeZOP/VJ"£/V"r­ l/YPRO~c.?6:Y I • . . ----·-....... -. -~-----------·· --- I I ' I -+·· . ---.L ...... . I I ; (j) 1. _ JlIT)' OF SAN D TECO D(r'A~7"~rITT OF S.A!-iITATIOH g. r:LOot) CO~liROL 45• I I l 100-VEAR 6-Hour PRfCltlTATU:l;J r-20 ✓ ,soPLUVtALS IOF 100-YEAn S~Houn l ... ~r1,s Q9: ·n iq u l1 H i • Iv lJ / ' ~-"' ') • ~ jO' I .------r:-~--~ 3 30' ·-·----------· ---'-:: _ _____::-~_-: --~----~-=. --~-fr?'"~-~--»--~~-... -.... ··,- l S' WI ill' <I -.... , 0£P~R7MENr OF SANITATION l FLOOD CO~TROL 0 ':I;., > ~. ..,. ~ --....J '::' •· V'I ~ 7 -:;. ~. '-J> ~-~ ~ 1 '::' C ~ ' ' .: - 4S' 30' -.. ----.--------.------.-... )0' I 'i I I • Intensity (In./Hr.) -::,,;;~-cr:::er::.i., On.). I O'I I [ '"' D1r~ct)On$ for t~p11catfon: 1) F'r-oll", ;;rec~pft.at1on ""iclps de,te:-v.1ne 6 hr. and 24 hr, aroo .. r,ts for the se~ &c :ed frenuenc.v. ihese rr.aps a re ~r) ri~~ fr! the Cownty Hvcii--o 109.) r'.an1.,a l (i 0, 5'.) r1rid 100 yr. tr,aps 1 nc:1 wd~d in ti Oeyign and Proced~re ~~,.,~a1 ). 2) Adjvst 6 hr. prec1pitat1c,n _(if r.e:essary) so that it 1s wHhin the rarige of 457. to 6St of the 24 hr. precipitatfcn. (~ot tfr1icab1e to jesert) 3) Pbt 6 hr. ~r-edpH..at~on on the riort st of the c.r.a rt. S} This 11~e 1s the in!ersity-d~pat1on c~~ve for the 1ocatior. ~e~~s a~a~)zed. App1icat1on Ferm: 0) Se; ec ted Fr-~~ .. e,,cy J_~ yr . 1) P5 a '2' (p 4-0 ... CP5·"1* in, I P,4• ' p6. Pz4 2) Ac'.jvs tea "'? s• "2,(t> in. 3) t • C 5.0 min. 4) I • (p.e,5 i rJ r.r. PHO J t:CT ~)±?~ WOf GSo:5--/ SHT or CALC __ DI\TE __ CHK._D __ O\TE_ S'fATION. ________ .....;AIU.:A R£f£R£NCE. __ @ __ _ O" . 05 7 (SO aC4161) AREA. ______ X . 918 (200 ac4h1) • :?~ 0{q ACRES Raa1dent'41: ___ Sing!tt family /(20 MulU-UniU ___ Mobile Homos 91. u (2000) ___ Rwal (Jots greater thdn 1/2 ocre) Commercial {2) ---80"-' lmpervlou.u ___ lndu•tr1al (2) 90'-' Impcuvious DM£ Qt QQNCJ;NTW\TlQN T~ (Chfta 8-l) Ht.Pt.___ H. __ _ Lo.Pt. __ _ T B.Vli9 r r = o -1 x C:A. L. __ _ C • __ min __ hr UO mln. m1n1mwn) -s:· 0 Alt1tuda f octor • ____ (Ch111t C) ~oett1c1~nl " Q " Sol! Ty~ ( l) A ». .Q. .40 .4~ .50 .45 . 50 . 60 . .es .50 . 55 .30 .35 .40 .10 .75 . 00 .80 .85 .90 Tc• (1_1,~uJ9"JtiS T,;• Tlmt.t 1n HOUffj L• 0 l• UlnC41 1n MU• I H• H•11Jhl 1n l'tiut Q • 55 a <Ii) . 65 • .45 • .es• .95 • --- C • ,70 __ CA -1.:4.L. l_ • __ x __ .. /hr __ ct1 1 '4ctor x/. 4.!l.. US£ Q_, • ____ CFS 100 • • x6,fJS .. /hr CA 9.-8.Zcta U8£ 0100-4Z 9 CYB Jwforence: San Dte(Jo County flood Control Dtu1Qn 4r\Cf Procedure MaouAl {l) Oww soil lypc, trom ApptuKhccua lX-C 1 lhru lX-C4 (0 Pl<O J £CT I/€ ½fZ??r-L wot <k;5??S:L __ sHT __ or CALC __ 0\1'E CHKD O\TI:_ S'fATJON ___________ AR.E:A R£f£R£NC£. __ ® ___ _ 0.. . 05 7 (SO aC41tt) ARfA . £ 0 X . 918 (200 acold) • ('./., I~ f\CRES 91. 8 (2000) CO,l;ffJCl~NI Qf,,,RJJ.NQIL Q (con11dur prolM.abltt dovelopm.-nl) % f ;,,nrl ••ae ------~.,...1'..._ ___ Single r om Uy /06 MuJU-UnlU ___ MobUa, Homes ___ RUr41 (Jola greater than 1/2 acre) CommercldJ (2} ---60'.¥. JmpiHVlOLUl ___ lnduatriol (2) 904' lmpatvtoua DM£QfCON~O'fl'.&.11QJL~ (Chan D-l) .HL.Pt.___ H. __ _ Lo.Pt. __ _ L. __ _ .fllJliQf f; Q • I ~ CA. AlUtLKi@ fcactor • ____ (Cbut C) ~9S2l'JCjt(Ll ." ~ " Soil 'J'y~ ( l) A !! -~ . .co -•~ .so .45 .50 .60 . .cs .so .55 .30 .35 .40 . 70 .75 . 60 .80 .OS .90 Tc• ( .1,L.~U. 3?3ti5 Tr;• Tlm@ in Hou, tJ l.• 01• UIOC. &ll JvHl•• H• Hai,JiU an f'uot Q .55 111 @-,7Q .6S • .45 • .85 • .9S ·• --- C • ,,7Q - CA -c:2(/(e_ 1£2 • _j_ x __ .. /hr __ eta ua£ Q_ -____ crs 1 uac,o, x:2Lf-"2.. • l 00 -/ X "2-8.S-" /hr CA 0, -z9 ct. Rc.1fortrncti: San DttHJO County flood Control O~slQn ond Procaduro Mdnu41 (l) Oblcarn sod Lypu ltom Appond!Ccti IX-Cl Uuu IX-C4 PkOJECT /ffi'~,,,,- WOf ~/ SHT Of ------CALC __ OI\TE __ CHKD Cw\TE_ S'fATION ________ AR£A REf£R£NCE __ @ __ 0.. . OS 7 (50 a CA la) ARf.A 9 0 .X .916 (200 acal~) • Ol,80 ,ACRES 91. 6 {2000) CO,£ffIQJ~N,LQ,f.ft.JJ.ttQ.f..l..i...£ (con, Ader probobJ¥ dav•lopmitot) ~2t.:lfJCJ~!ll " ~ " Boil Ty.--( 1) A f Q ~ RoatdenUal: ___ Singla famHy .40 ··~ .50 .55 a /00, MulU-UniU ---MobUa Homaa ___ Rural lJou greater than l/2 acre) ___ Commc.ucldJ (2) 80~ Jmpervtoua ___ lnduatriol (2) 90i, lmpdtVJoua IlM.& Qf co NCrlft&\IlQ N ~~ lChAn B-l} HL.Pt.___ H. __ _ Lo.Pt. __ _ 1!.V.NQIJ;,,,Q • I x~ L. __ _ TC • __ mtn __ hr {t6 nrtn. mtn!mwn) $.,0 .45 .so .60 .• 5 .50 .55 .JO .35 .40 . 'JO . 7S . 8D .oo .os .90 Tc• Ii L YU,.Jj\,JIJ5 \-· H / T,;• Timo in H®fB L• 01.uanc. 1n MU•• H• HaiCJhl 1n f@ut @ .65 • .45 • • lj5 - .95 • I_ • __ ¥ __ "/hr __ eta '4ctor v✓('2_ • U8£ Q_ • ____ CFS 1100• __ x6,8:S, "/hr CA C{B::z!~cta USE0100-0.:z lwfotcrnce; San Dtec;,,o County f!cxx.t Control Ot1tHt;1n And Procoduru Mdnu41 (l) Oblorn sod lypd trom APPOl\(hCa/i IX--C l l.hfU IX-C 4 CFB --- PltO J t:CT _j/.§):'£2~ WOt 650:..... / SHT Of CALC __ ~ii: __ CHK-:-::-D--~T&_ S'fATJON ________ AtU.:A R£f£RENC.C __ @ __ _ 0" . 05 7 (50 aCAle) AREA 4. ~ X . 918 (200 acAht) • 0, 09, _J\CR£S 91. 8 (2000) C.Q.£frIClEN1=Qf RJJ.N,Qf,f,. {; (conaidor pro.bdbl.-d1tvMlopm~ot) Roatdentia1: ___ Singlet famUy &,_O _ MulU-Un!t1 ___ MobUa Homos ___ Rw-Al lto,s greater than 1/2 ocre) Commercidl (2) ---80':W. lmpen,,ou.s ___ lnduatriol (2) 90~ ImpdlVJoua IIMt Qr CONCCNT.MTIQN T~ (Ctwut B-1) HLPt.___ H. __ _ l.D. Pt.· --- J!.IJ.!'lQf f; Q • l x~ L. __ _ 1c • _ ____,min __ hr (l6 mt,r. minimum) s:o AlUtwia factor• ____ (Chart C) ~f!c11,wl " Q " Sou Ty~ ( l) A J! Q .40 -•~ .5D .45 .50 . 60 .45 .50 .55 .30 .35 .40 .10 . 1f) .60 .oo . 90 Tc• ~_1,~U.li)365 Tr.:• Tima 1n Hours L• Dlauanc. rn MU•• H• H,u ... ht in f1tut Q • SS a <JI) . 65 • ,if 5 • .85 • .95 .• --- I_ • __ x __ "/hr __ eta UBE 0_ • ____ CFS 1 IAcr.or ~Ok • 100---~-!3~ N/hr CA a4S-ct, ~terencti: Sdn Dteyo County flood Control Dtu,1i;,n 4f~ Procedure Mtiou4l l l) Obadrn soll 1y~ from Appond1ccu1 lX--C 1 thru lX-C4