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.