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The Water Erosion Prediction Project model represents a new erosion prediction technology based on fundamentals of stochastic weather generation, infiltration theory, hydrology, soil physics, plant science, hydraulics, and erosion mechanics. The hillslope or landscape profile application of the model provides major advantages over existing erosion prediction technology. The most notable advantages include capabilities for estimating spatial and temporal distributions of soil loss (net soil loss for an entire hillslope or for each point on a slope profile can be estimated on a daily, monthly, or average annual basis), and since the model is process-based it can be extrapolated to a broad range of conditions that may not be practical or economical to field test. In watershed applications, sediment yield from entire fields can be estimated.
A CD-ROM was released July, 1995 with WEPP and a DOS interface for general public use. A WWW site(http://topsoil.nserl.purdue.edu/weppmain/wepp.html) also was established for information, technical support, and free downloads of developed software. A new Windows based interface is being developed which will be incorporated into a MOdular Soil Erosion System (MoSES) that will include WEPP, WEPS, RUSLE2 and RWEQ models.
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