| Title: | Application of an environmental and economic modeling system for watershed assessments |
| Authors: | Gassman, P.W., E. Osei, A. Saleh and L.M. Hauck |
| Year: | 2002 |
| Journal: | Journal of the American Water Resources Association |
| Volume (Issue): | 38(2) |
| Pages: | 423-438 |
| Article ID: | |
| DOI: | 10.1111/j.1752-1688.2002.tb04327.x |
| 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: | 930 km^2 Upper North Bosque River, located in north central Texas; 1,270 km^2 Lake Fork Reservoir, located in northeast Texas; 162.24 km^2 Upper Maquoketa River, located in northeast Iowa; all in U.S. |
| Calibration Summary: | Upper N. Bosque reported in Saleh et al. (2000); Lake Fork mean comparisons reported in Osei et al. (2003; J. Range Manage.); 6-month mean comparisons reported for Upper Maquoketa River |
| Validation Summary: | |
| General Comments: | SWAT output was generated within an integrated modeling system that included APEX and a Farm Economic Model (FEM), for several different scenarios simulated for the 3 watersheds. Predicted reductions in P losses across the three watersheds ranged from -4 to -59% for two P-based manure application rate scenarios, but the N loss impacts ranged from a decrease of 34% to an increase of 79%. The economic impacts ranged from a decrease of 27% to an increase of 25% in profit. |
| Language: | English |
| Keywords: | modeling; water quality; watershed management; nutrient management; crop rotations; tillage systems |