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<br />002723 <br /> <br />3.3 EIQQg_~ggnl!~gg~ <br /> <br />Flood magnitudes are determined by comparing recorded or estimated <br />rates of flow with established frequency-discharge information, usually <br />in the form of a table or a graph. Peak discharges in the upper Eagle <br />River and Gore Creek basins are computed by regression equations to <br />predict the 10-, 50-, 100-, and 500- year frequency discharges as a <br />function of drainage area. The equations are listed below: <br /> <br />EQUATIONS FOR COMPUTING PEAK DISCHARGES <br /> <br />) <br /> <br /> QIO = 39. 2'~ A )0.'7 <br /> Q50 = 52.04 A )0.1 <br /> Qroo = 57.14 A )0.1 <br /> ., )0.7 <br /> Q5'Jo = 69.39 A <br />Where A is the drainage area in square miles <br />and Q is the discharge in cubic feet per second <br /> <br />A summary of the computed peak discharges in the vicinity of Dowds <br />Junction is shown in the table below and in the graph of Figure 3. <br /> <br />SUMMARY OF DISCHARGES <br />Vicinity of Dowds Junction, Colorado <br /> <br />FLOODING SOURCE <br />AND LOCA HON <br /> <br />DRAINAGE AREA <br />(Square Miles) <br /> <br />PEAK DISCHARGES(C F S) <br />la-Yr. SO-Yr. lOa-Yr. sOO-Yr. <br /> <br />Eagle River <br />Downstream of <br />Gore Creek <br /> <br />362 <br /> <br />2430 3220 3530 <br /> <br />4290 <br /> <br />Eagle River <br />Upstream of <br />Gore Creek <br /> <br />260 <br /> <br />1925 2550 2800 <br /> <br />3400 <br /> <br />Gore Creek <br />At Mouth <br /> <br />102 <br /> <br />1960 2600 2850 <br /> <br />3500 <br />