SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Spatial evaluation of alternative nonpoint nutrient regulatory instruments 
Authors:Whittaker, G., R. Fare, R. Srinivasan and D.W. Scott 
Journal:Water Resources Research 
Volume (Issue):39(4) 
Article ID: 
URL (non-DOI journals): 
Broad Application Category:hydrologic and pollutant 
Primary Application Category:model and/or data interface 
Secondary Application Category:pollutant cycling/loss and transport 
Watershed Description:~259,000 km^2 Columbia Plateua region, which covers portions of the states of Washington, Oregon, Idaho, Montana in the northwest part of the U.S. 
Calibration Summary: 
Validation Summary: 
General Comments:SWAT was interfaced with a type of linear programming model referred to as a data envelope analysis (DEA), which assumes a profit maximization objective function. Two N fertilizer policies were evalulated: a 25% N rate reduction (gov. command & control) versus a 300% tax on N fertilizer (reflecting inelastic demand for N fert.). SWAT was executed using USGS 8-digit watersheds as subwatersheds; amount of N reaching outlet of each 8-digit was estimated using 1,000 bootstrap samples from 10 simulations for each 8-digit. The 300% tax was found to be preferred over the command & control approach due to better financial & policy efficiencies. 
Keywords:water quality, economics, agriculture, nitrogen, nonpoint