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ESTIMATE OF FLOOD CHARACTERISTICS FOR EAST SALT CREEK <br />ABOVE CONFLUENCE OF <br />EAST SALT AND MUNGER CREEK, GARFIELD COUNTY, COLORADO <br />2 - Compute flood characteristics for Southern Plateau Region from <br />Procedure for ungaged sites with streams in mixed population <br />flood areas: <br />1 - Compute basin and climate parameters: <br />Mountain Region Southern Plateau Region <br />Drainage Area A = 24mi2 (planimetered) A = 79.7mi2 (planimetered) <br />Mean Annual PPT. P = 21.4 inches <br />Table 4: <br />• <br />Peak Discharges of <br />Selected RI Floods <br />STD Error of Estimate, $ <br />Average Range <br />410 - 59.7 (79.7)0.709 = 1331cfs 47 +58 to -36 <br />450 - 89.1 (79.7)0.709 = 1986cfs 50 +62 to -38 <br />4100 = 103 (79.7)0.710 = 2306cfs 53 +66 to -40 <br />4500 - 137 (79.7)0.713 = 3108cfs 65 +84 to -46 <br />If s tudy site is above 6500 ft, reduce flood discharges <br />according to Figure <br />D10 = 1.25 (79.7)0.261 = 3.9 ft <br />D50 = 1.54 (79.7)0.254 = 4.7 ft <br />Depths of Selected <br />RI Floods <br />D100 = 1.64 (79.7)0.254 = 5.0 ft <br />D500 = 1.98 (79.7)0.239 = 5.6 ft <br />STD Error of Estimate, ~ <br />Average Range <br />25 +29 to -22 <br />34 +40 to -28 <br />36 +42 to -30 <br />44 +53 to -35 <br /> <br />