soilassessment (version 0.3.0)

erodFUN: A function to estimate soil erodibility factor

Description

A function to determine soil erodibility factor from a choice of different erodibility models

Usage

erodFUN(sand,silt,clay,OC,texture,Struct,method)

Value

soil erodibility factor ranging between 0 and 1

Arguments

sand

sand proportion (percent) of the soil texture

silt

silt proportion (percent) of the soil texture

clay

clay proportion (percent) of the soil texture

OC

soil carbon content (percent)

texture

soil texture code representing the USDA soil textural class. Use classnames("texture") to insert the correct texture code

Struct

soil structure code representing the soil structure class. Use classnames("structure") to insert the correct structure code

method

method for determining soil erodibility. The following methods are included: WSmith,Yang,Renard,Bouyoucos,Denardin,Wang,Wisch1,Wisch2,Sharpley,Cheng,Auer.

Author

Christian Thine Omuto

References

Benavidez R, Bethana J, Maxwell D, Norton K. 2018. A review of the (Revised) Universal Soil Loss Equation ((R)USLE): with a view to increasing its global applicability and improving soil loss estimates. Hydrol. Earth Syst. Sci., 22, 6059–6086

Omuto CT and Vargas R. 2009. Combining pedometrics, remote sensing and field observations for assessing soil loss in challenging drylands: a case study of northwestern Somalia. Land Degrad. Develop. 20: 101–115

See Also

erosivFUN, erodibilityRisk, sloplenFUN

Examples

library(sp)
bx=suitabinput
sand=textureinput["sand"]
silt=textureinput["silt"]
clay=textureinput["clay"]
soc=nutrindicator["soc"]
bx$permeability=permeabilityClass(bx$texture)
bx$wsmith=erodFUN(sand$sand,silt$silt,clay$clay,soc$soc,bx$texture, bx$structure,"WSmith")
bx$renard=erodFUN(sand$sand,silt$silt,clay$clay,soc$soc,bx$texture, bx$structure,"Renard")
summary(bx$renard)
spplot(bx["wsmith"])