Development of Spatiotemporal Source-Sink, Stratified Nitrogen Water Quality Model

A spatiotemporal source-sink, stratified water quality model was addressed in this paper. Model development effort was underway by coupling a surface water quality model with a hydrologic model. The hydrologic model, which estimated stormwater runoff from surrounding basins using Soil Conservation Service (SCS) method, was integrated with CREAMS nutrient submodel to evaluate corresponding sedimentary nitrogen transported from the basins. Afterwards a two-layer finite segment framework was developed to characterize in-reservoir water quality conditions. This framework predicted the fate and transport of Nitrogen influx in the reservoir. Verification of the water quality model was achieved through in-situ data from two sampling locations in the reservoir. A Geographic Information System (GIS) was used extensively in watershed analysis such as utilizing Digital Elevation Model (DEM) and raster data operations to delineate watersheds, and then to parameterize spatiotemporal topographic features for estimating stormwater runoff and nitrogen loadings.