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WWRC 88-06
Estimates of Upland Erosion and Runoff in an Arid Watershed in Wyoming


Rainfall simulation experiments were conducted in the Fifteenmile Creek watershed of north-central Wyoming to identify nonpoint sources of suspended sediment. A portable drop-forming rainfall simulator was chosen for reasons of low cost and low water requirements. Simulated rainstorms were applied to 73 study plots for a duration of 1 hour. Rates of erosion and runoff were found to be most closely related to vegetation density, litter density, slope gradient, and soil texture. Erosion and runoff production were then related to composite terrain types to facilitate data analysis and display in a geographic information system.

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