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Estimating Random Roughness in the Field

Book Cover of RUSLE

The nine examples presented here are taken from the U.S. Department of Agriculture (USDA) publication "Predicting Soil Erosion by Water: A Guide to Conservation Planning with the Revised Universal Soil Loss Equation (RUSLE)".

These examples of surface roughness require Adobe Reader.

Random Roughness of 0.25 inch (PDF; 122 KB)
Random Roughness of 0.40 inch (PDF; 123 KB)
Random Roughness of 0.65 inch (PDF; 117 KB)
Random Roughness of 0.75 inch (PDF; 111 KB)
Random Roughness of 0.85 inch (PDF; 129 KB)
Random Roughness of 1.05 inch (PDF; 131 KB)
Random Roughness of 1.60 inch (PDF; 108 KB)
Random Roughness of 1.70 inch (PDF; 312 KB)
Random Roughness of 2.15 inch (PDF; 321 KB)
 



 

Additional Documents

WEQ Ridge Roughness Values (PDF; 7 KB)
— Memo from Gary Tibke, NRCS Conservation Agronomist, explaining ways to determine random roughness

 
WEQ Random Roughness Guidelines (PDF; 31 KB)
— Detailed explanation of random roughness. Includes table and chart for helping determine roughness in the field


 



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