Rill parameters: Grain size class limits are from [49], texture class is determined following [47].

Kt is a transport coefficient, which has been adopted from the WEPP dataset. The WEPP-location is given. Measured values are starting soil moisture, maximum width, maximum depth, grain density, dry bulk density, org. material; parameters estimated in the field are vegetation cover and rock fragment cover; critical shear stress is calculated following WEPP.