Abstract
There have been many scholars in Taiwan using several different versions of AGNPS for relative studies. United States Department of Agriculture has continuously improved AGNPS for the update of operation system in computer, and therefore Ann AGNPS used in Window system is made up. In the combined interface for Ann AGNPS and expanded modules of ArcView GIS, we could process AGNPS DOS version directly. The interface includes converting to grid, neighborhood statistics, drawing stream, delineating watershed and outlets, overlaying figures, clipping subwatershed, and calculating runoff rate, delivery of nitrogen, phosphorus, and sediment yield. A small well-treated agricultural watershed in Tso-chen, Tainan County was selected as material for this study to compare the difference between Ann AGNPS and AGNPS DOS. If we could set up the complete shape file about soil, fields and climate station in Taiwan, then Ann AGNPS may be applied in Taiwan.
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