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<br />Peak discharges for Meadow Creek were obtained at its <br />mouth (drainage area 5.8 square miles) and at the location <br />immediately upstream of its south fork (drainage area 4.7 square <br />miles). These discharges are reported in Table 2. <br /> <br />DISCHARGE-FREQUENCY DETERMINATIONS <br />The discharge-drainage area relationships for the streams, <br />covered in this report, are shown in Figure 2. This <br />figure shows the 10-, 50-, 100-, and 500-year frequency <br />discharges for the snowmelt events analysis of the gaging <br />records and the corresponding regression lines (Eqs. 5-8). <br />These are assumed to be valid for the streams with catchment <br />basins 30 square miles or larger. For streams with smaller <br />catchment basins, the 50-year, 100-year, and 500-year regression <br />lines were modified to incorporate discharge-drainage area <br />relations (Table 2) obtained by the SCS procedure (Ref. 8). <br /> <br />For streams studied here, the discharge-drainage area relations <br />shown in Figure 2 were used to determine peak flows for ungaged <br />streams, and for gaged streams with less than 10 years of <br />record. The only exception to the above is West Tenmile <br />Creek which is described in detail below. For gaged <br />streams with 10 or more years of record, the discharges <br />calculated by the Log Pearson Type III analyses were used. <br /> <br />Whenever a gage with 10 or more years of. record was availabl~ <br />upstream or downstream of the study reach, the discharges \ <br />for the reach were obtained by adjusting the calculated <br />frequency discharge using the area relationship developed irt <br />the regression equation. For example, if the computed <br />frequency discharge at the gage fell below the regression line, <br />a line through this point parallel to the regression line <br />was used to select the discharge. -_.--~ <br /> <br />DISCHARGE-FREQUENCY DATA FOR WEST TENMILE CREEK <br />Gage records near the mouth of West Tenmile Creek (drainage area <br />21 square miles) show significantly larger discharges than one <br />would expect from consideration of the regression lines in <br />Figure 2. The gage recorded discharges for the total period <br />of record, 1974 to 1978, are 370, 504, 300, 356, and 643 cfs <br />respectively. Since the record is very short, the following <br />-R- <br />