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Watershed-Scale Simulation of Sediment and Nutrient Loads in Georgia Coastal Plain Streams using the Annualized AGNPS Model

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  022092,  2002 ASAE Annual Meeting . (doi: 10.13031/2013.10399) @2002
Authors:   Jennifer B. Suttles, George Vellidis, David Bosch, Richard Lowrance, E. Lynn Usery, Joseph M. Sheridan
Keywords:   Watershed, Nutrient and Sediment Load Modeling, AGNPS, Predictive Modeling, Water Quality Monitoring, Non-point Source Pollution, Geographical Information Systems, Hydrologic Modeling, TMDL

Sediment and nutrient loadings in the Little River watershed in south central Georgia were modeled using the continuous simulation annualized Agricultural Nonpoint Source Pollution (AGNPS) model. Specifically, nitrogen, phosphorus, sediment and runoff were predicted over a seven-year period. Land under cultivation makes up approximately 25% of the 333-km2 watershed. Livestock facilities are predominantly swine, dairy cows and beef cattle. Results from the simulation were compared to 7 years of monitoring data in 6 locations of varying drainage areas throughout the watershed.

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