A Comparative Study Of The Effects OfInput Resolution On The SWAT Model

摘要: Resolution is a sensitive issue in environmental modeling and geo-spatial analysis. This study utilizes the SWAT (Soil Water Assessment Tool) model integrated with ArcView. The overall goal of this research was to determine how resolution input data. For example, data layers that originated at 250m, 125m, 30m 3m were resampled 30m, 90m, 120m 240m. Data collected for Alafia River watershed Tampa Bay Estuary West Central Florida. Initial were: Digital Elevation Models (DEMs), soils landuse; all analyzed sensitivity four different resolutions; viz. Landuse photo-interpreted from 1:12,000 color-infrared digital ortho-quarter quadrangles (DOQQs) obtained Southwest Florida Management District (SWFWMD). GIRAS landuse EPA BASINS website 125m resolution. Soil Survey Geographic Database (SSURGO) 250m State (STATSGO). DEMs 90m United States Geological (USGS) makes no assumption original any way improved by resampling higher Output variables tested flow out, sediment total phosphorous (TP) out NO3N out. From analysis these outputs, it evident outputs were, fact, variation resolutions, some more than others. Results indicate coarser landuse, tend under-predict soils, annual temporal