Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Entire DC Network
Estimating Sediment Yield Using Agricultural Non-Point Sources (Agnps) Model: The Effects Of Slope Information From Different Gis Software.
Journal of Spatial Hydrology
This study compares the effects of slope information derived from three GIS software on sediment yield as estimated using AGNPS model. The three GIS software are IDRISI for Windows, ERDAS Imagine and ArcView. The results of the study clearly demonstrated that the different software produced different slope information. The deviations were considerable when the comparisons were based on raw slope values. The maximum slope values generated by the software differed by as much as 61 percent. Not only the software produced different slope values, the locations where the maximum slope occurred were also different. These differences in slope information subsequently …
Nps Assessment Model: An Example Of Agnps Application For Watershed Erosion And Phosphorus Sedimentation
Journal of Spatial Hydrology
AGNPS, which is an agricultural non-point source pollution model, was used in combination with GIS tools to assess the feasibility of water quality effluent trading for phosphorus, in Morrow Lake sub-watershed, Kalamazoo, MI. GIS software packages (Arc/Info and ArcView) are used to prepare data input for the model and post process the results. The sensitivity of AGNPS parameters was evaluated to determine which most influenced phosphorus sediment loading. Evaluations were conducted to determine whether calculation processes could be simplified for rapid pollution forecasts. The results showed that pollution could be predicted by varying temporary model data (i.e. precipitation etc.) in …