The coarse fragment factor is calculated:
CFRG=exp(−0.053∗rock) 4:1.1.15
where rock is the percent rock in the first soil layer (%).
Table 4:1-5: SWAT input variables that pertain to sediment yield.
USLE_K
KUSLE​: USLE soil erodibility factor (0.013 metric ton m2 hr/ (m3-metric ton cm))
.sol
USLE_C
CUSLE,mn​: Minimum value for the cover and management factor for the land cover
crop.dat
USLE_P
PUSLE​: USLE support practice factor
.mgt
SLSUBBSN
Lhill​: Slope length (m)
.hru
HRU_SLP
slp: Average slope of the subbasin (% or m/m)
.hru
ROCK
rock: Percent rock in the first soil layer (%)
.sol