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<br /> <br /> <br /> <br /> <br /> <br />o <br />o <br />o <br /> <br />(SP) 3~C!'1H~Sla >l'13d <br /> <br />o <br />a <br />o <br /> <br /> <.: <br /> w <br />g a: <br /> <.: <br />s <br /> w <br /> "'Ul <br /> <':0 <br /> Zw <br /> <.:J: <br /> a:Ul <br /> Oa: <br /> - w <br /> ". - <br /> 01- <br />0 -" Z<': <br />0 .- <br /> E O';t <br /> - <br /> - <br /> " 1->:: <br /> '" UW <br /> '" ZW <br /> " ::>a: <br /> '" "-u <br /> " <br /> " 0 0 <br /> Z <br /> " ~ Z <br />c '" c<.: <br /> 0 WUl <br /> "'." <br /> a: " <br /> <.: c <br /> J:W <br /> Uw <br /> UlZ <br /> - <br /> O';t <br /> >::;;: <br /> '" <br /> w ~ <br /> 0.. 0 <br /> - <br /> <br />Table Z Shews t~me of cQnce~trat~on as a f~nctlon of drainage area <br />-or developed portions Of the drainage ~asin. This relationShio was <br />deve10ped from an analysis of severai representative a~eas ~lthjn the <br />city limits of Sterling. <br />TABLE 2 ~ r:t>!E OF CJNWj7RAT:m~ 'IS. <br />ORArNAG~ AREA cOR DEVELOPEJ <br />AREAS, S7E::l.UNG, COLORAOC <br /> <br /> iJpstreamArea T;l'1e Of Cc ne en tra t~ 0 n I <br /> (acres) (minutes) <br /> I 12 <br /> 5 13 <br />I Ie 17 <br />15 20 <br />, 10 22 <br />I 30 16 <br /><a 30 <br />, 60 36 <br />I SO " <br />100 " <br />1:0 52 <br />I '00 sa <br /> <br />Rat; Dna 1 fOn11~l a es t irr.iltes of peak d isc.~arge frOrT; representa tive <br /> <br />developer: areas were us eo as the ~as is for dedv'ng adjws ~::1e"~ factor, t: <br />t:e appliea to :eai<s for ,jndev(!lcced 1and obtained fr:", Fig~rell. n.e peak <br />:'~o,,' fac';o~s ue expressed as a f'Jnction of recurre~ce interval ~elow, <br /> <br />Recurrence <br />Intenal (yrs.l <br /> <br />?eaK Flow Ad;ust~ent <br />Factor <br />2.0 <br />, ' <br />,.J <br /> <br />00 <br /> <br />" <br />~ <br />~ <br />CO <br />"- <br /> <br />2 <br />5 <br />10 <br />25 <br />50 <br />leo <br /> <br />,,0 <br /> <br />1.5 <br />. , <br />,., <br />., <br /> <br />" <br />" <br />