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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />II <br />i I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Title 01 5tudy: <br />County: <br />Calculations By: <br /> <br />CWCS Hvdroloqv Worksheet <br /> <br />FI5 - Arapahoe County and Incorporated Areas <br />Arapahoe <br />jag Date: January 2, 2001 <br /> <br />Page 2 <br /> <br />Documentation <br />This workbook estimates 1 OO-year discharges lor approximate floodplains in Colorado using the lollowing <br />source: <br />Browning, T.W, 1999. Guidelines lor Determining 100-year Flood Flows lor Approximate <br />Floodplains in Colorado, Version 4.0, Colorado Water Conservation Board. January, <br /> <br />River Basin <br /> <br />i SPl-l: South Platte, Eastern Plains S~bregion <br /> <br />5tatus 01 Regression Equations lor this sub-region: <br /> <br />Accepted <br /> <br />Regression Equation Data <br />Q=aAb <br /> <br />Where: <br />Q = Discharge (cIs) <br />A = Drainage Area (square miles) <br />a = coefficient = <br />b = coefficient = <br /> <br />707,9 <br />0.654 <br /> <br />Limited by: <br />Minimum Drainage Area = <br />Maximum Drainage Area = <br /> <br />2 square miles <br />1090 square miles <br /> <br />Discharge Calculations <br /> <br />Drainage <br />Area (mi2) <br />173,69 <br />219.63 <br />38,61 <br />85.22 <br />67.42 <br />- ___. 74.06 <br />-'6.64 <br />,- -----, <br />West Bijou Creek, at Elbert/Arapah()El County line_ _. 2!~_ <br />West Bijou Creek - at East Quincy Avenue extended 244,13 <br />,----,-_.. ,--- ,--, <br />Middle Bijou Creek - at Elbert/Arapahoe County line 138,48 <br />Middle Bijou Creek - at Middle-Sijou Creek trib" just south 01 1-82~93" <br />- Middle Bijou Creek Tributary - at mouth - 9.50 <br />Middle Bijou Creek - at mouth. _ 199.08 <br />Rattlesnake Creek - at mouth 34,87 <br />East'Bijou Creek - at Elbert/Arapahoe County line" 274.86 <br />Bijou Creek - at Adams/Arapahoe County line 561.97 <br />Muddy Creek - at Elbert/Arapahoe County line 12.04 <br />Muddy Creek - at Adams/Arapahoe County line 71.87 <br /> <br />Discharge Point Description <br />Kiowa Creek, at Elbert/Arapahoe (;ounty line <br />Kiowa Creek' at 1-70 <br />Woll Creek - at Elbert/Arapahoe County line <br />Wolf Creek - at 1-70 <br />Comanche Creek - at Elbert/Arapahoe County line <br />Comanche Creek - at East Quincy Avenue- <br />East Comanche Creek - at East Quincy Avenue <br /> <br />1/2101 <br />eWeS_Hydrology.xls <br /> <br />Discharge <br />Point ID <br />517 <br />518 <br />519 <br />520 <br />521 <br />522 <br />523 <br />524 <br />525 <br />526 <br />527 <br />528 <br />529 <br />530 <br />531 <br />532 <br />533 <br />534 <br /> <br />8 <br /> <br />1 OO-year <br />Discharge (cIs) <br />20,644 <br />24,068 <br />7,721_ <br />12,958 <br />11,117__ <br />11,822 <br />2,442 '~ <br />,- <br />23,772, _ <br />25,791 <br />-17,801'- <br />--'----'- <br />21,355 <br />3,086 <br />22,570 -- <br />7,223,_ <br />27,871.,_ <br />44,492 <br />3,603 <br />11,592 <br />