Detachment Proportional to Slope Length Factor
ØSlope length effect
-l= (x/72.6)n
-x = location on slope
-n = slope length exponent
ØSlope length exponent
-Related to rill:interrill ratio
-Slope steepness, rill:interrill erodibility, ground cover, soil biomass, soil consolidation
ØSlope length factor varies on a daily basis
One of the major changes from RUSLE1 was to eliminate the choice of an LS table in RUSLE1.04/1.05 or the choice of a land use in RUSLE1.06.
The same fundamental approach is used where the slope length factor is a function of the rill to interrill erosion ratio.
The rill to interrill erosion ratio is computed on a daily basis thus it changes on a daily basis as the factors, like ground cover, change on a daily basis.
Thus, the slope length factor changes on a daily basis