Abstract

A computer model has been used to estimate potential sheet and rill erosion and delivered sediment from field-sized areas of five selected agricultural watersheds. Consideration of these estimates in relation to defined tolerance levels of soil erosion and sediment yield has resulted in the mapping of (1) areas that exhibit erosion problems and serve as sediment sources; (2) areas that exhibit only erosion problems (but do not act as sediment sources); (3) areas that serve only as sediment sources (but do not exhibit erosion problems); and (4) areas that have no significant erosion problems or sediment sources. A simple approach has been developed for the preparation of such maps on the basis of a limited data base involving factors affecting erosion and fluvial sedimentation. This relatively simple yet accurate technique offers agricultural and conservation extension personnel a method for the identification of soil erosion problem areas and (or) sediment sources.

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