MUSLE.K: Estimate soil erodibility factor K.
In VFS: Vegetated Filter Strip and Erosion Model

Description Usage Arguments Details Value Author(s) References See Also Examples

Estimates MUSLE soil erodibility from a multiple regression model of soil texture.

1	MUSLE.K(fc, fm, ff)

`fc`	Fraction of coarse material (sand) in the soil (0-1).
`fm`	Fraction of medium material (silt) in the soil (0-1).
`ff`	Fraction of fine material (clay) in the soil (0-1).

If K is not available from other sources, it can be estimated from soil texture (Goslee, in review).

Returns the soil erodibility factor K.

Sarah Goslee

Wischmeier, W. H. and Smith, D. D. (1978) Predicting rainfall erosion losses-a guide to conservation planning. U.S. Department of Agriculture, Agriculture Handbook No. 537.

MUSLE

# Approximate erodibility factor from soil texture.
Kf <- MUSLE.K(.3, .5, .2)

# Calculate landscape factor from field size and shape.
# 100-m field length with 2% slope
# note that MUSLE.LS takes feet
LS <- MUSLE.LS(100 * 3.28, .02)

# assume 0.4 ha cornfield with known rainfall intensity
peakd <- peak(intensity = 55, area = 0.4)

SedYield <- MUSLE(85, qp = peakd, A = .4, K = Kf, LS = LS)