Laserfiche WebLink
<br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />I. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />I. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />I. <br />. <br />. <br />. <br />I. <br />. <br />. <br />. <br />. <br />. <br />'. <br />. <br />I. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />,. <br />I. <br />. <br /> <br />CWCB HvdroloQV Worksheet <br /> <br />Page 4 <br /> <br />Title of Study: <br />County: <br />Calculations By: <br /> <br />FIS - Gunnison County, Colorado and Incorporated Areas <br />Gunnison <br />jrs Date: January 14, 2002 <br /> <br />Documentation <br />This workbook estimates lOQ-year discharges for approximate floodplains in Colorado using the following <br />source: <br />Browning, T.W. 1999. Guidelines for Determining 100-year Flood Flows for Approximate <br />Floodplains in Colorado, Version 4.0. Colorado Water Conservation Board. January. <br /> <br />River Basin <br /> <br />I COL-4: Colorado, upper Gunnison RIVer Subregion <br />Status of Regression Equations for this sub-region: <br /> <br />G <br /> <br />Draft <br /> <br />Regression Equation Data <br />Q=aAb <br /> <br />Where: <br />Q = Discharge (cfs) <br />A = Drainage Area (square miles) <br />a = coefficient = <br />b = coefficient = <br /> <br />50.1 <br />0.838 <br /> <br />Limited by: <br />Minimum Drainage Area = <br />Maximum Drainage Area = <br /> <br />20 square miles <br />300 square miles <br /> <br />Discharge Calculations <br /> <br />Drainage Drainage 1 OQ-year <br />PointlD Drainage Area Description Area (mi") Discharge (cfs) <br />300 Willow Creek - U/S of Abbeyville 31.91 912 <br />301 Taylor River - U/S of 5 mile Creek 354,17 Outside Bounds <br />302 Taylor River - U/S of Beaver Creek 466.27 Outside Bounds <br />310 Coal Creek - at mouth 21.88 665 <br />311 Slate River - U/S of Coal Creek (at Town of Crested Butte) 34,21 967 <br />312 Farris Creek - at mouth 9.60 Outside Bounds <br />313 East River - U/S of Farris Creek 90.79 2,191 <br />314SR Slate River. at mouth 90.05 2,176 <br />314ER East River - U/S of Cement Creek 190.44 4,076 <br />315 Cement Creek - at mouth 40.25 1,108 <br />316 East River - U/S of Alkali Creek 264.54 5,369 <br />317 Alkali Creek - at mouth 13.62 Outside Bounds <br />318 East River. U/S of Taylor River (tums into Gunnison) 301.46 Outside Bounds <br />320 Castle Creek - at mouth 22,37 6n <br />321 Pass Creek - at mouth 11.49 Outside Bounds <br />3270-P Ohio Creek - U/S of Pass Creek 13.66 Outside Bounds <br />3270-C Ohio Creek. U/S of Castle Creek 25.15 747 <br />324 Ohio Creek - U/S of Carbon Creek 57.17 1,487 <br /> <br />1/1412002 <br />CWCB_Hydrology.x1s <br />