Comparer des méthodes

	Équation Universelle de Perte de Sol	HEC-RAS
Domaine	Géophysique	Géophysique
Famille	Process / pipeline	Process / pipeline
Année d'origine	1978	1995
Auteur d'origine	Waldo Wischmeier and Dwight Smith	US Army Corps of Engineers Hydrologic Engineering Center
Type	Empirical soil erosion prediction model	1D/2D river hydraulics and flood inundation modeling
Source fondatrice	Wischmeier, W. H., & Smith, D. D. (1978). Predicting rainfall erosion losses: A guide to conservation planning. USDA Agricultural Handbook 537.	Brunner, G. W. (2010). HEC-RAS river analysis system hydraulic reference manual. US Army Corps of Engineers Hydrologic Engineering Center.
Alias	USLE, Revised USLE	HEC-RAS
Apparentées	3	3
Résumé	The Universal Soil Loss Equation (USLE) is an empirical model that estimates annual soil loss due to sheet and rill erosion on hillslopes caused by rainfall and runoff. Developed by Wischmeier and Smith in 1978 from decades of erosion plot experiments, USLE has become a standard tool for erosion risk assessment, conservation planning, and best management practice design. The Revised USLE (RUSLE) updated the original model with improved factor algorithms.	HEC-RAS (Hydrologic Engineering Center River Analysis System) is a hydraulic modeling software developed by the US Army Corps of Engineers that computes water surface elevation and velocity in open channels and floodplains, and depicts inundation extent and depth. Since its introduction in 1995, HEC-RAS has become the de facto standard for floodplain delineation, dam break analysis, and flood risk assessment for regulatory and engineering purposes.