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North Eagkvier Droinge Corgept Phase <br />CCi(\ICEPT 'DITCH' - LIAAIT #3 DITCH DOWNSTREAM DLSCHAIb6E <br />As port of this shdy re crostrvcted into modek of the #3 Ditch, me in XV SWMM and the secvd in HE{-RAS. <br />FCC~2A5 (Ftydrobgic Ergirnenirg Center -Rive Ardysis System) k a oomputa progrom deK.bped by the V.S. <br />Army Corps of Engineers to omlya fbw rcgimes it rives ad charnels It FCC 2. <br />The Ditch ras modeled from the F St spill sfructu+e (cross sector #1%) boated upsfnean of the F Street bridge <br />to a point dorrstrean of the Eagkview Pond. Treaty tro cross sectianrs from #t75 ihru #196 rere defined n the <br />modrJ over a ditch length of 7,400 feet. The cross section data was idcm from the Lidstone 6 Andasan #3 pitch <br />~'dY- <br />Flans rrre input to the ditch from the fakwring seven racers <br />irrigation flans of 100 cfs input aF the F St spill uoss section #1% <br />• stem n+wff from far sds~bosirs #1 thrv #4 shorn m dnuirg #3 at the end of this soctian, berg <br />udevebped brd between the #3 pitch ad the Weber West subdivision to the south <br />• storm nnof f from iro weber west dctentian pads sFwn m doting #3n at the ad of this o-tick <br />• stain runoff from offsite the Weber West devebpmmt ud pasig steno the pad spilhrays <br />Ponometers used n the SWMM model ore: <br />Lrfiltration psomehrs <br />Depression storage <br />Manning's n <br />Zero detention <br />Horton Initial Infiltration rate <br />Min (Asynptotic) role <br />Decay <br />Inigatian flour <br />100 cfs <br />(from Cone Drainage Pbn CCB pg 17, 18) <br />predonwmnt sal is Group B <br />Imperious Arca Perious Area <br />0400 0100 <br />0014 0030 <br />00% <br />4.500 <br />0.600 <br />0.0018 <br />inputnt Section #196 as irntrensing b ShaEy flow <br />Cakubtiorns for the 100 ymr storm peak rvnff to the Ditch are shown n the table on the fabrig pack. fZ,enff <br />was cdcubted both by The Ratarnal method and by XP-SWMNL The brgrr whirs cdwlated by SWMM were talcm <br />os the more corsmative sokrtion. <br />Pope 28 <br />