Coarse Fragment Factor

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.

Variable Name	Definition	Input File
USLE_K	$K_{USLE}$: USLE soil erodibility factor (0.013 metric ton m$^2$ hr/ (m$^3$-metric ton cm))	.sol
USLE_C	$C_{USLE,mn}$: Minimum value for the cover and management factor for the land cover	crop.dat
USLE_P	$P_{USLE}$: USLE support practice factor	.mgt
SLSUBBSN	$L_{hill}$: 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