Watershed characterization.

摘要: This chapter presents a case study on spatially explicit watershed runoff potential characterization using ArcGIS. The watershed characteristics greatly influence the origin, composition, and concentration of terrestrial-derived sediment-borne pollutants as well as their TOGGLEsequent deposition to surrounding aquatic environments. A Geographic Information System (GIS)-integrated characterization of watershed allows for spatial analysis of watershed characteristics that play a critical role in runoff. The major tasks to characterize a watershed include the analysis of spatial distribution of the following properties of the watershed: slope and digital elevation model (DEM) data, geology, land use and land cover (LULC), and soil properties namely, hydrologic soil groups (HSGs) and saturated hydraulic conductivity (Ksat). Watershed characteristics analyzed for the study included the following: slope, geology, soil …