Ill. Admin. Code tit. 35 § 501.360
Where:
ai | = | long-term average soils loss for the ith day; |
ri | = | erosivity factor; |
ki | = | soil erodibility factor; |
li | = | soil length factor; |
S | = | soil steepness factor; |
ci | = | cover management factor; and |
pi | = | supporting practices factor, |
all on the ith day, except for slop steepness factor (S). | ||
Where:
A | = | average annual soil loss. |
365m | = | number of days per year. |
m | = | number of years in the analysis period. The value for m is 1 for continuous vegetation on range, pasture, and other lands, where conditions are the same year after year, while m = the number of years of cropping management rotations on cropland and the number of years following a disturbance such as construction, logging, grading of a reclaimed surface mine, or closing of a land fill where conditions are changing year to year. |
BOARD NOTE: Soil loss may be calculated using Revised Universal Soil Loss Equation 2 (RUSLE2) software program available at http://fargo.nserl.purdue.edu/rusle2_dataweb/RUSLE2_Index.htm. Additional information may be obtained from the United States Department of Agriculture, Agricultural Research Services, 1400 Independence Avenue, S.W., Washington DC 20250, (202) 720-3656.
Ill. Admin. Code tit. 35, § 501.360