Predicting Sediment Yield in Western United States

by Elliott M. Flaxman, Sedimentation Specialist; Engrg. & Watershed Planning Unit, Soil Conservation Service, USDA, Portland, OR,

Serial Information: Journal of the Hydraulics Division, 1972, Vol. 98, Issue 12, Pg. 2073-2085

Document Type: Journal Paper

Discussion: Simanton J. Roger (See full record)
Discussion: Happ Stafford C. (See full record)
Discussion: Singh Vijay P. (See full record)
Discussion: Kolář Václav (See full record)

Abstract: An equation for predicting the average annual sediment yield from sheet erosion is developed through multiple regression analysis. Most of the variation in yield is explained with data obtained by measurement of four watershed characteristics. A climatic factor as an indirect expression of vegetative cover, the average watershed slope, and two soil factors are the variables used. A good correlation of computed with measured sediment yields is obtained except at the lower rates of sedimentation. Improvements in predictive value can be achieved with experience in judging the necessary adjustments in the vegetative cover factor, through more intensive soil sampling and by use of only longtime sediment yields as the dependent variable. The data selected for this analysis are intended to exclude the influence of extensive gully or stream bank erosion on sediment yield.

Subject Headings: Sediment | Erosion | Regression analysis | Vegetation | Watersheds | Climates | Correlation | Slopes | North America | United States

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