השוואת שיטות

	משוואת אובדן הקרקע האוניברסלית	NDVI
תחום	גאופיזיקה	גאופיזיקה
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1978	1973
הוגה השיטה	Waldo Wischmeier and Dwight Smith	Rouse, Haas, Schell, and Deering
סוג	Empirical soil erosion prediction model	Spectral index for vegetation assessment
מקור מכונן	Wischmeier, W. H., & Smith, D. D. (1978). Predicting rainfall erosion losses: A guide to conservation planning. USDA Agricultural Handbook 537.	Rouse, J. W., Haas, R. H., Schell, J. A., & Deering, D. W. (1973). Monitoring vegetation systems in the Great Plains with ERTS. Third Earth Resources Technology Satellite Symposium Proceedings, 1, 309-317.
כינויים	USLE, Revised USLE	NDVI
קשורות	3	3
תקציר	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.	The Normalized Difference Vegetation Index (NDVI) is a spectral index computed from satellite or aerial multispectral imagery that quantifies vegetation greenness and vigor. Introduced by Rouse and colleagues in 1973 using Landsat data, NDVI has become the most widely used remote sensing metric for vegetation monitoring, drought assessment, crop productivity forecasting, and land cover change detection.