# USLE

            For comparative purposes, SWAT+ prints out sediment loadings calculated with USLE. ***These values are not used by the model, they are for comparison only.*** The universal soil loss equation (Williams, 1995) is:

    $$sed=1.292\*EI\_{USLE}\*K\_{USLE}\*C\_{USLE}\*P\_{USLE}\*LS\_{USLE}\*CFRG$$       4:1.2.1

 where $$sed$$ is the sediment yield on a given day (metric tons/ha), $$EI\_{USLE}$$ is the rainfall erosion index (0.017 m-metric ton cm/(m$$^2$$ hr)), $$K\_{USLE}$$ is the USLE soil erodibility factor (0.013 metric ton m$$^2$$ hr/(m$$^3$$-metric ton cm)), $$C\_{USLE}$$ is the USLE cover and management factor, $$P\_{USLE}$$ is the USLE support practice factor, $$L\_{USLE}$$ is the USLE topographic factor and $$CFRG$$ is the coarse fragment factor. The factors other than $$EI\_{USLE}$$ are discussed in the preceding sections.


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