WEPP soil erodibility experiments for rangeland and cropland soils

Laflen, J. M., W. J. Elliot, R. Simanton, S. Holzhey and K. D. Kohl. 1991. WEPP Soil Erodibility experiments for rangeland and cropland soils. J. Soil and Water Conserv. 46(1):39-44. 1991.

Keywords: WEPP

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Abstract: The experimental determination of soil erodibility values for WEPP requires the use of different plot areas, procedures, and measurements than those for determining USLE soil erodibility. A study on rangeland and cropland soils has been conducted over much of the United States to produce the data base needed to estimate soil erodibility for application of WEPP to the nation's soils. Analyses indicate that the soil erodibility values bear little quantitative resemblance to USLE soil erodibility values, but variables important in determining USLE soil erodibility values, such as particle size distribution and organic matter content, may also be important in determining WEPP soil erodibility values. Extremely high erosion rates may occur in rills, particularly if flow rates are high and slopes are fairly steep.

Moscow FSL publication no. 1991a