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Slone Length <br />The slope length is described as the typical slope length for the <br />subwatershed arcs the distance frcan the point of origin of overland flow <br />• until the point that the slope decrPa~G such that significant deposition <br />occurs or until the flow enters a defined channel. The slope lengths were <br />determined as follows: <br />SUbwatershed I = 500' (Diversion 1) <br />Subwatershed II = 400' <br />Subwatershed III = 500' (Porn 008) <br />Average Sloe <br />The average slope is the typical or representative slope (in percent) for <br />overlarx3 flora for each subwatersherl. <br />Slibwatershed I = 19$ <br />Subwatershed II = 18.9$ <br />Subwatershed III = 16$ <br />The C and P Factors <br />The C factor, the cover and management factor, is the ratio of soil loss <br />from an area with specified cover and management to that from an identical <br />• area in tilled continuous fallow. <br />The P factor, the support practice factor, is the ratio of soil loss with <br />a support practice like contouring, strip cropping, or terracing to that <br />with straight-row farming up and dawn the slope. <br />The C factor was determined with the aid of the USDA-ARS revised USLE <br />software program for each cover type with the overall drainage area. The <br />P factor is based on current or future practice. Table 7-6f-12 shows the <br />results for the C and P factors for the various areas. Table 7-6f-13 is a <br />weighted average based on the individual subwatersheds. <br />• <br />7-6f-11 Revised 08/21/91 <br />