Abstract
Seven data sets where sheet and rill erosion were measured for slopes less than 10.7 m (35 ft) in length were used to verify the current USLE slope length relationship for slopes as short as 4 m. A computer program based on the USLE and the Foster-Wischmeier irregular slope analysis, was developed to allow comparison of inter-terrace soil loss between terraces of different cross section. Depositional effects due to reduction in slope steepness were considered but found to produce minimal reduction in calculated soil movement under typical field conditions. Because the program considers soil loss from up to 10 slope segments, the effect of terrace design parameters such as ridge height, cutslope length, and slope and terrace spacing on inter-terrace erosion can be considered.
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