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<br />. <br />. <br />. <br />. <br />I. <br />I,. <br />:. <br />.. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />I. <br />. <br />. <br />i. <br />I. <br />'. <br />. <br />. <br />I. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br /> <br />- <br /> <br />CWCB HvdroloGv Worksheet <br /> <br />Pagel <br /> <br />Title of Study: <br />County: <br />Calculations By: <br /> <br />FIRM - Montrose County Unincorporated Areas <br />Montrose <br />jag Date: November 3, 2000 <br /> <br />Documentation <br />This workbook estimates 1 DO-year discharges for approximate floodplains in Colorado using the following <br />source: <br />Browning, TW. 1999. Guidelines for Determining 1oo-year Flood Flows for Approximate <br />Floodplains in Colorado, Version 4.0. Colorado Water Conservation Board. January. <br /> <br />River Basin <br /> <br />8 <br /> <br />I DLR-l: Dolores, Dolores River Subregion <br />Status of Regression Equations for this sub-region: <br /> <br />Draft <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 />213.8 <br />0.601 <br /> <br />Limited by: <br />Minimum Drainage Area = <br />Maximum Drainage Area = <br /> <br />2 square miles <br />1080 square miles <br /> <br />Discharge Calculations <br /> <br />Discharge Drainage 1 DO-year <br />Point 10 Discharge Point Description Area (mi2) Discharge (cis) <br />01 San Miguel - at Montrose / San Miguel County Line 439,43 8,287 <br />02 Naturita Creek - at Montrose / San Miguel County Line 146.27 4,278 <br />03 Broad Creek - at Montrose / San Miguel County Line 15,65 1,117 <br />04 San Miguel. immediately U/S of Horsefly Creek. 478.22 8,719 <br />05 Horsefly Creek (Dol. Basin) - immediately d/s of Red Canyor 89.51 3,185 <br />06 Horsefly Creek (Dol. Basin) - immediately d/s of Sheep Cree 97.69 3,357 <br />07 Horsefly Creek (Dol. Basin) - at mouth 112.69 3,658 <br />06 San Miguel - immediately U/S of Naturita Creek 701.76 10,979 <br />09 Naturita Creek - immediately U/S of Maverick Draw 161.65 4,543 <br />010 Maverick Draw - at mouth 70.75 2,765 <br />011 Naturita Creek - immediately u/s of Hamilton Creek 232.78 5,656 <br />012 Hamilton Creek. immediately u/s of Broad Creek 32.23 1,724 <br />013 Broad Creek. at mouth 21.06 1,335 <br />014 Hamilton Creek - at mouth 69.08 2,726 <br />015 Naturna Creek - at mouth 303.80 6,638 <br />01B San Miguel - immediately U/S of Dry Creek 1023,17 13,712 <br />017 Dry Creek (SM Basin) - at mouth 178,99 4,830 <br />016 San Miguel - immediately u/s of Calamity Draw 1206,78 Outside Bounds <br /> <br />11I3lOO <br />CWCB_HydroIogy.x1s <br />