SDR Model documentation - Interpreting Results
factor for USLE (Eq. 1 and 2)
s_bar mean slope factor for
upslope contributing area
w_bar (and bare_soil) -> mean weighting factor (C factor) for upslope contributing area (Eq. 4)
ws_factor (and bare_soil) -> denominator of the downslope factor (Eq. 5)
 Equations are given next to the items but I can't find any equation numbers in the user guide model description, and the matching isn't immediately clear.