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<br />. <br /> <br />. <br /> <br />. <br /> <br />PROJECT: <br />FEATURE" <br /> <br />INHD COUNTY - 1-25 CORRIDOR MASTER DRAINAGE PLAN <br />DURATION/fREQUENCY/INTENSITY COMPUTATIONS <br /> <br />BY' BFS <br />CHK BY <:". <br /> <br />DATE 02124199 <br />DATE: 3 lC' <br /> <br />PROJECT NO COWELD01 <br />SHEET: FREQUENCY <br /> <br />REGION 1 : <br />LOCATION <br />LAT. <br />LONG <br />ElEVATION <br /> <br />SOuth Plalle, Republican, Ar1uInsas, and Clmarroo River Basins <br />Frederick <br />nI. <br />nI. <br /> <br />5000 feel <br /> <br />DURATION 5-MIN 10-MIN 15-MIN 30-MIN l"HR 2-HR 3-HR 6-HR 24-HR <br />DURATION FACTORS 02' 0.45 057 07. 100 <br /> DI~~h 1~~~nliIY . O,~ Inten~:y Ol:~ ~~n~!~y O~~~h Intensity D/~~:h 1~~~n~i:V DJ~,plh I~~~nsity O~~~ I~:~~V D/~~ "'Ienaily OJ~~ 'n'on~'iV <br />fREQUENCY Inlhr Ii""" ,""" 'in ' IlrlIhrl onl'" on Inlhf\- lin """ on linlh< <br />2-YR 028 341 0.44 265 056 223 077 155 098 098 11. 058 12' 043 1.00 0.25 2.10 000 <br />S-YR 040 484 063 375 079 317 110 220 1.39 1.39 "0 080 1.75 058 2.00 0.33 2." 012 <br />10-YR 049 585 0.76 454 09' 363 133 265 1.68 "8 '91 095 2.0e 0'9 2.31 0.3' 3.20 013 <br />25-YR 059 7.tO 0.92 551 1.16 465 161 322 2.04 204 232 "' 254 085 2.87 .... 4.00 017 <br />5<>YR 0" 825 107 640 135 540 187 374 2.31 237 267 1.34 290 0.97 3.25 .... 4.60 019 <br />100.YR 078 933 121 724 153 '" 212 423 ,.8 ,.8 303 151 329 110 3.70 O..:z 5.10 021 <br /> <br />Noles <br /> <br />1. BOLD" input from AUulaoptuyl.la Of Graphing (Figure '.J <br /> <br />2, ITALICS:: Computed Values <br /> <br />3, EQUATIONS USED: <br />lHR. 2YR" .218'" ,709(2YR6HR"2/2YR24HR) <br />1HR, l00YR '" 1,897 ... ,439(100YR6HR"2/100YR24HR) - ,OO6(ElEVATI0N1100) <br />2HR = .342(6HR) ... .658(1HR) <br />3HR = ,597(6HR) ... .403(lHR) <br />5MIN '" .29O(1HR) <br />lOMIN '" .45O(1HR) <br />15MIN:: .570(1HR) <br />3OMIN.:: ,79O(1HR) <br /> <br />4. SAMPLE CALCULATIONS: <br />1HR. 2YR: 0218 0.709 -I 1.500 ^2/ 2100 I" 0978 inches <br />lHR. l00YR= 1897 , 0.439 '1 3700 ^2/ 5100 1 ~ 0008 '( 5000 I 100 I:: 2675 ind'les <br />2HR, 10YR= 0.342 'I 2,350 I' 0'" '( 1680 I; 1909 Ind'les <br />3HR, SOYR: 0597 'I 3250 I' 0403 '( 2370 1= 2895 Inches <br />JQMIN. 5YR= 0790 'I 1390 )= 1098 """", <br />5MIN, 25YR= 0.290 '( 2,040 I; 0592 inches <br /> <br />- <br />- <br />....... <br />~ <br /> <br />p lr(lIA/f"t nf'll\C:PQ,,~n<::\PR"rIP' wtl1 <br /> <br />D3ID4III9 <br />