Unit source area data: can it make a difference in calibrating the hydrologic response for watershed-scale modeling?

Journal of Soil and Water Conservation, May, 2007 by Green, C.H.; Starks, P.J.; Van Liew, M.W.

Watershed computer models such as the Soil and Water Assessment Tool (SWAT) contain parameters that describe watershed properties such as vegetative cover, soil characteristics, or landscape features. For investigations that involve changes in land cover or land management on agricultural lands, proper adjustment of these parameters is important not only for runoff estimation, but also for the simulation of sediment, nutrients, and other pollutants. However, these parameters may only be known for a few small, homogeneous areas, and the usefulness of such parameters in calibrating the runoff response for a watershed scale model such as SWAT is not well documented. The objective of this study was to determine if model parameters that govern the surface runoff response in SWAT that...

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