Estimated Average Annual Sheet and Rill Erosion in Relation to T Value for Pastureland by Year

State of Oregon.
National Resources Inventory Results.
Estimated for Non-Federal Lands Only.
 

See Details Page for further explanations.
See the National NRI Glossary for complete definitions.

1982 Pastureland.

1982 Pastureland.
T=0 Estimate = 147,800 acres.
T=0 Error = 25,800 acres.

1982 Pastureland.
>0<=T Estimate = 1,802,000 acres.
>0<=T Error = 99,100 acres.

1982 Pastureland.
>T<=2T Estimate = 43,900 acres.
>T<=2T Error = 10,700 acres.

1982 Pastureland.
>2T<=3T Estimate = 43,400 acres.
>2T<=3T Error = 18,200 acres.

1982 Pastureland.
>3T<=4T Estimate = 3,700 acres.
>3T<=4T Error = 3,300 acres.

1982 Pastureland.
>4T<=5T Estimate = 5,800 acres.
>4T<=5T Error = 5,800 acres.

1982 Pastureland.
>5T Estimate = 6,900 acres.
>5T Error = 3,000 acres.

1982 Pastureland.
Total Estimate = 2,053,500 acres.
Total Error = 107,500 acres.

1987 Pastureland.

1987 Pastureland.
T=0 Estimate = 186,400 acres.
T=0 Error = 30,500 acres.

1987 Pastureland.
>0<=T Estimate = 1,744,700 acres.
>0<=T Error = 98,100 acres.

1987 Pastureland.
>T<=2T Estimate = 39,100 acres.
>T<=2T Error = 16,500 acres.

1987 Pastureland.
>2T<=3T Estimate = 19,400 acres.
>2T<=3T Error = 10,300 acres.

1987 Pastureland.
>3T<=4T Estimate = 7,000 acres.
>3T<=4T Error = 5,600 acres.

1987 Pastureland.
>4T<=5T Estimate = 8,300 acres.
>4T<=5T Error = 6,300 acres.

1987 Pastureland.
>5T Estimate = 7,100 acres.
>5T Error = 3,000 acres.

1987 Pastureland.
Total Estimate = 2,012,000 acres.
Total Error = 107,800 acres.

1992 Pastureland.

1992 Pastureland.
T=0 Estimate = 170,000 acres.
T=0 Error = 29,000 acres.

1992 Pastureland.
>0<=T Estimate = 1,749,800 acres.
>0<=T Error = 92,100 acres.

1992 Pastureland.
>T<=2T Estimate = 45,500 acres.
>T<=2T Error = 17,600 acres.

1992 Pastureland.
>2T<=3T Estimate = 21,400 acres.
>2T<=3T Error = 10,500 acres.

1992 Pastureland.
>3T<=4T Estimate = 1,800 acres.
>3T<=4T Error = 1,500 acres.

1992 Pastureland.
>4T<=5T Estimate = 8,300 acres.
>4T<=5T Error = 6,300 acres.

1992 Pastureland.
>5T Estimate = 5,700 acres.
>5T Error = 2,800 acres.

1992 Pastureland.
Total Estimate = 2,002,500 acres.
Total Error = 103,000 acres.

1997 Pastureland.

1997 Pastureland.
T=0 Estimate = 175,400 acres.
T=0 Error = 31,100 acres.

1997 Pastureland.
>0<=T Estimate = 1,714,400 acres.
>0<=T Error = 91,800 acres.

1997 Pastureland.
>T<=2T Estimate = 43,900 acres.
>T<=2T Error = 17,500 acres.

1997 Pastureland.
>2T<=3T Estimate = 20,800 acres.
>2T<=3T Error = 10,400 acres.

1997 Pastureland.
>3T<=4T Estimate = 2,200 acres.
>3T<=4T Error = 1,600 acres.

1997 Pastureland.
>4T<=5T Estimate = 600 acres.
>4T<=5T Error = 600 acres.

1997 Pastureland.
>5T Estimate = 3,400 acres.
>5T Error = 2,300 acres.

1997 Pastureland.
Total Estimate = 1,960,700 acres.
Total Error = 102,400 acres.

NOTE: Data may not add to totals because of rounding. The error referred to in the table is the standard error of the estimate. You can obtain the margin of error at the 95% confidence limit by multiplying the error by 1.96.

Standard errors greater than 50% of the estimate indicate a low level of statistical reliability.

The T=0 column indicates no USLE estimate was made or the USLE estimate is less than 0.005 (the database stores the USLE as two decimal places). For the purposes of this analysis, all acres in this category are assumed to be eroding below T.

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Last Modification: Friday, June 06, 2003

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