LS Table 

The values of LS for croplands can be found from the following table. This table gives LS values for slopes from 0.2% to 60% and slope length from less than 3 ft. to 1,000 ft.

 

Values for Topographic Factor, LS, for Moderate Ratio of Rill to Interrill Erosion 1/

 

Horizontal Slope Length (ft.)

 

Slope

(%)

 

<3

 

6

 

9

 

12

 

15

 

25

 

50

 

75

 

100

 

150

 

200

 

250

 

300

 

400

 

600

 

800

 

1,000

0.2

0.05

0.05

0.05

0.05

0.05

0.05

0.05

0.05

0.05

0.05

0.05

0.05

0.05

0.05

0.06

0.06

0.06

0.5

0.07

0.07

0.07

0.07

0.07

0.08

0.08

0.08

0.09

0.09

0.09

0.09

0.09

0.10

0.10

0.10

0.10

1.0

0.11

0.11

0.11

0.11

0.11

0.12

0.13

0.14

0.14

0.15

0.16

0.17

0.17

0.18

0.19

0.20

0.20

2.0

0.17

0.17

0.17

0.17

0.17

0.19

0.22

0.25

0.27

0.29

0.31

0.33

0.35

0.37

0.41

0.44

0.47

3.0

0.22

0.22

0.22

0.22

0.22

0.25

0.32

0.36

0.39

0.44

0.48

0.52

0.55

0.60

0.68

0.75

0.80

4.0

0.26

0.26

0.26

0.26

0.26

0.31

0.40

0.47

0.52

0.60

0.67

0.72

0.77

0.86

0.99

1.10

1.19

5.0

0.30

0.30

0.30

0.30

0.30

0.37

0.49

0.58

0.65

0.76

0.85

0.93

1.01

1.13

1.33

1.49

1.63

6.0

0.34

0.34

0.34

0.34

0.34

0.43

0.58

0.69

0.78

0.93

1.05

1.16

1.25

1.42

1.69

1.91

2.11

8.0

0.42

0.42

0.42

0.42

0.42

0.53

0.74

0.91

1.04

1.26

1.45

1.62

1.77

2.03

2.47

2.83

3.15

10.0

0.46

0.48

0.50

0.51

0.52

0.67

0.97

1.19

1.38

1.71

1.98

2.22

2.44

2.84

3.50

4.06

4.56

12.0

0.47

0.53

0.58

0.61

0.64

0.84

1.23

1.53

1.79

2.23

2.61

2.95

3.26

3.81

4.75

5.56

6.28

14.0

0.48

0.58

0.65

0.70

0.75

1.00

1.48

1.86

2.19

2.76

3.25

3.69

4.09

4.82

6.07

7.15

8.11

16.0

0.49

0.63

0.72

0.79

0.85

1.15

1.73

2.20

2.60

3.30

3.90

4.45

4.95

5.86

7.43

8.79

10.02

20.0

0.52

0.71

0.85

0.96

1.06

1.45

2.22

2.85

3.40

4.36

5.21

5.97

6.68

7.97

10.23

12.20

13.99

25.0

0.56

0.80

1.00

1.16

1.30

1.81

2.82

3.65

4.39

5.69

6.83

7.88

8.86

10.65

13.80

16.58

19.13

30.0

0.59

0.89

1.13

1.34

1.53

2.15

3.39

4.42

5.34

6.98

8.43

9.76

11.01

13.30

17.37

20.99

24.31

40.0

0.65

1.05

1.38

1.68

1.95

2.77

4.45

5.87

7.14

9.43

11.47

13.37

15.14

18.43

24.32

29.60

34.48

50.0

0.71

1.18

1.59

1.97

2.32

3.32

5.40

7.17

8.78

11.66

14.26

16.67

18.94

23.17

30.78

37.65

44.02

60.0

0.76

1.30

1.78

2.23

2.65

3.81

6.24

8.33

10.23

13.65

16.76

19.64

22.36

27.45

36.63

44.96

52.70

 

1/  Such as for row-cropped agricultural and other moderately consolidated soil conditions with little to moderate cover (not applicable to thawing soil).

From Technical Guide to RUSLE use in Michigan, NRCS-USDA State Office of Michigan.

R   K   LS   C   P   T

 

Copyright 2002 Institute of Water Research, Michigan State University