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<br />V. 1I\l)ROLOGIC ANA"YSIS <br /> <br />VI. Il\'DRAlILIC A.I-.ALYSIS <br /> <br />The hydrologi~ .nalysis wa, pe,formed 10 define the ,tonn runoff peak flows and volumes for hydrologic <br />poin's or intere,t The runoff informalion was ,ubscqucmly med 10 evaluate lhe exiSling "minage <br />facilities. potemial draina~e problems. alternative dminage irnprooernenls. and dcsign capacily of ,be <br />re.;,)mmcnded allernal;vedrainagesySlems <br /> <br />The rouling of runoff lhrough existing and proposed drainage facililies wa< performed mIng ,he Urban <br />O,ainage Slormw.'er Management Modd (SWMM) computer model published by lhe U,ban Drainage and <br />Flood Control ~istrict in Denver. The flow rouling ""twork wa, develope<! ha.ed on assumed floWJlalh' <br />of 2-ye.r runoff. BUlh e.,isung structures and propos<:d facililic. were modelled lhrough the usc of <br />dIffereminpurdatascts. <br /> <br />The major basins an: deSCribed above in Chapler II. Within the MSA. major hasins wcn: divided inlo a <br />10lal of 166 drainage suh-basins(see Drawing. 3 and 4). Peak flow, al each suh-ba<in oullet poinl were <br />e.limmed u,ing thc C()lorado Urban Hydrograph Procedure (CUHP) compuler program, Runoff was <br />eompuled for lhe 2_, 5_, 1O-..5(}... aDd lOO-year,lonns, <br /> <br />ExIsting "rueture informaliou wasoblained from Cily 'Ionnsewer "'"PS and rleldob..",alio"s F.-J<i'ting <br />delenlion pond volumes and release rales wen: estimated from consllUcrion drawings or olhe, InformalIon <br />provIded by the CIly. Exi<lin8 and proposed pipe oapacilIes were ba,ed on the assumption lhal pIpe <br />slopes are approxImalely equal 10 lhe o"erl~'ing ground ,lope', The existing "ruetore capaoilies Iypically <br />JonotineludcmcclgUtlCrflowcapacilics. <br /> <br />Hydrologic modclling was perfom,ed in acoordance with Ihe Manual. The CUHP Rational MClhod oplIon <br />Wa, used for drainage sub-basins I." lhan 100 acre, in ,I,e, For the dIfferenl basin. lhe appropriate <br />ra:nf~1I dislriblllion. wilb reSpe<:1 10 basin sI,e, wa, u.ed In acwrdar~e Wilh the Manual <br /> <br />The ,eador i, referred to lhc Hydrology Report for ~dJiticn~1 infonnlllon conce,ning llie hydraulic <br />anal}',isusedfordevclopm~,t1lofthe Ma"erPlan, <br /> <br />, <br /> <br />The reade, Is ,eferred 10 the Hydrology Report volume of the Master Plan for addItional informatIon <br />cnnecrning the hydrologie analysis, <br /> <br />" <br /> <br />" <br />