| Title: | Spatial evaluation of alternative nonpoint nutrient regulatory instruments |
| Authors: | Whittaker, G., R. Fare, R. Srinivasan and D.W. Scott |
| Year: | 2003 |
| Journal: | Water Resources Research |
| Volume (Issue): | 39(4) |
| Pages: | 1079 |
| Article ID: | |
| DOI: | 10.1029/2001WR001119 |
| URL (non-DOI journals): | |
| Model: | SWAT |
| 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. |
| Language: | English |
| Keywords: | water quality, economics, agriculture, nitrogen, nonpoint |