TY - JOUR T1 - Advances in wind and water erosion prediction JF - Journal of Soil and Water Conservation SP - 27 LP - 29 VL - 46 IS - 1 AU - George R. Foster Y1 - 1991/01/01 UR - http://www.jswconline.org/content/46/1/27.abstract N2 - EROSION prediction is a powerful tool used by soil conservationists for almost five decades. The value of erosion prediction was recognized almost immediately after A. W. Zingg (22) in 1940 published his erosion equation that calculated sheet and rill erosion as a function of slope length and steepness. Soon, factors for the effects of climatic crosivity, cropping, and management were added (17) to Zingg's equation, and the concept of a soil loss tolerance was introduced. The universal soil loss equation Although several erosion equations have been developed, the most popular one by far is the universal soil loss equation (USLE) developed by W. H. Wischmeier and his associates for sheet and rill erosion (19). A similar equation for predicting erosion by wind, the wind erosion equation (WEQ), was published in 1965 by N. P. Woodruff and F. H. Sidoway (21). These equations are used almost exclusively by the Soil Conservation Service (SCS) and other user agencies to estimate soil erosion rates needed to plan conservation practices, inventory and assess erosion, and develop and implement soil conservation policy. These equations also are used widely in countries other than the United States. A historical perspective … ER -