Abstract
The Universal Soil-Loss Equation (USLE) is a widely used method for calculating annual soil erosion losses, based on rainfall, runoff, slope, runoff length, soil type, and landuse parameters. The equation was originally developed on small agricultural plots, but has since been adopted for evaluating erosion from large watersheds under a wide range of landuses. This study was designed to compare USLE calculations in a GIS environment at grid sizes ranging from 30×30 m up to 6×6 km. The analysis of two watersheds in Mississippi shows that large grid sizes tend to underestimate soil losses. At grid sizes exceeding 100×100 m, a correction factor must be included in the calculations. With the use of the correction factor, the USLE can be applied directly at macroscales, providing an important tool for studies of basin-wide upland erosion rates. The proposed method is shown to be applicable for large watersheds under different climates.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
