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Table 4-12  
Estimated Average Annual Sheet and Rill (Surface Water) Erosion on Nonfederal Rural Land, by Major Land Resource Area, 1982 and 1987 (in Tons/Acre/Year)
  Cropland Forestland Pastureland Rangeland Minor Land Total Rural
Big and Little Wood River footslopes and plain
1982 0.9 0 0.1 0.4 0 0.5
1987 0.7 0 0.2 0.3 0.1 0.4
Change -0.1 0 0 -0.1 0 -0.1
Eastern Idaho plateau
1982 8.4 0.2 0.4 0.4 2.1 3.5
1987 7.1 0.2 0.4 0.3 1.4 2.9
Change -1.3 0 0 -0.1 -0.7 -0.5
Great Salt Lake area
1982 6.7 0.3 0.3 2.5 5.5 4.9
1987 4.4 0.3 0.3 2.5 4.4 3.5
Change -2.2 0 0 0 -1 -1.4
Lost River Range and valleys
1982 0.3 1.2 0.1 0.1 0 0.2
1987 0.2 0 0.1 0.1 0 0.1
Change 0 -1.1 0 0 0 0
Northern Rocky Mountains
1982 4.6 1.8 0.5 0.7 0.6 1.7
1987 3.2 2.1 0.5 1.5 0.4 2
Change -1.4 0.3 0 0.8 -0.2 0.2
Northern Rocky Mountain valleys
1982 1.5 0.6 0.1 0 0.1 0.7
1987 0.8 0.6 0.5 0 0.1 0.6
Change -0.7 0 0.3 0 0 0
Owyhee high plateau
1982 5.5 0 0.3 0.5 0 0.6
1987 0.8 0 0.2 0.5 0 0.5
Change -4.6 0 -0.1 0 0 -0.1
Palouse and Nez Perce prairies
1982 12.9 0.3 0.6 0.3 0.4 8.3
1987 10.4 0.3 0.5 0.3 0.4 6.7
Change -2.4 0 -0.1 0 0 -1.5
Snake River Plain
1982 1.4 0 0.1 0.4 0.5 1
1987 0.9 0 0.1 0.3 0.9 0.7
Change -0.5 0 0 -0.1 0.3 -0.3
Snake River Plain, Central
1982 2.3 0 0.2 0.3 0.8 1.4
1987 1.6 0 0.1 0.2 0.9 1
Change -0.7 0 0 0 0 -0.4
Snake River Plain, Upper
1982 2.3 0 0.1 0.6 0.4 1.6
1987 1.9 0.1 0.1 0.2 0.4 1.3
Change -0.4 0.1 0 -0.4 0 -0.3
Upper Snake River lava plains and hills
1982 1.9 0 0.9 0.3 0.9 0.4
1987 2.2 0 1.1 0.3 1.1 0.5
Change 0.3 0 0.1 0 0.1 0
Wasatch and Uinta Mountains
1982 11 0.5 0.4 0.8 1 2.2
1987 4 0.5 0.4 0.8 1 1.3
Change -7 0 0 0 0 -0.8
Total (average)
1982 5.3 1.5 0.3 0.5 0.5 2.3
1987 4.2 1.7 0.3 0.5 0.5 2
Change -1.1 0.2 0 0 0 -0.3
Source: U.S. Soil Conservation Service, 1982-1987 National Resources Inventory, December 1989.

Compiled by: Diane Prorak, data input assisted by: Robert Anton-Erik
Contact: Lily Wai

 

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