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<br />. <br /> <br />Table 10 <br />Model Rainfall Distribution <br /> <br />End of Period <br />(Minutes) <br /> <br />Percent of 6-Hour <br /> <br />30 <br />60 <br />90 <br />120 <br />150 <br />180 <br />210 <br />240 <br />270 <br />300 <br />330 <br />360 <br /> <br />2 <br />4 <br />4 <br />5 <br />9 <br />10 <br />40 <br />10 <br />6 <br />4 <br />4 <br />2 <br /> <br />. Losses. Reliable information on rainfall-runoff relationships <br /> <br /> <br />in the South Platte River basin are not readily available. This <br /> <br /> <br />lack of knowledge is primarily due to the inability to obtain the <br /> <br /> <br />time and areal distribution of rainfall events and the associated <br /> <br />volumes. The reasoning used to determine the model loss rates for <br /> <br /> <br />both the plains and the mountain areas is presented in the following <br /> <br /> <br />paragraphs. In each case a constant loss rate was assumed to be <br /> <br /> <br />applicable to all events regardless of their frequency. This <br /> <br /> <br />assumption was made after comparing the slopes of model developed <br /> <br /> <br />curves with those computed analytically from gaging records. <br /> <br />. Plains Losses. Infi1trometer studies made by the S.C.S. in the <br /> <br /> <br />Cherry Creek basin showed a minimum loss rate of 0.7 inch per hour <br /> <br /> <br />and an average loss rate of 1.07 inches per hour. This compares <br /> <br /> <br />with an average loss rate of 0.86 inch per hour computed for the <br /> <br /> <br />1965 inflow into Cherry Creek Reservoir. The infiltration map <br /> <br /> <br />prepared for the Missouri River Basin Framework Study indicated a <br /> <br />. <br /> <br />57 <br />