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Universal Soil Loss Equation R spatial package

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R_USLE

Universal Soil Loss Equation on spatial inputs

##About USLE Method The USLE for estimating average annual soil erosion is:

A = RKLSCP

  • A = average annual soil loss in t/a (tons per acre)
  • R = rainfall erosivity index
  • K = soil erodibility factor
  • LS = topographic factor - L is for slope length & S is for slope
  • C = cropping factor
  • P = conservation practice factor

###R - the rainfall erosivity index The erosivity index is a statistic calculated from the annual summation of rainfall energy in every storm (correlates with raindrop size) times its maximum 30 - minute intensity. As expected, it varies geographically.

##Datasources R rainfall erosivity index queiried from USDA RUSLE database

K ?Surgo?

LS slope length and slope determined from elevations using elevatR

C is a user specified landuse and lookup-table table for C values

P is user specified

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