Title: | Predicting water, sediment and NO3-N loads under scenarios of land-use and management practices in a flat watershed |
Authors: | Chaplot, V., A. Saleh, D.B. Jaynes and J. Arnold |
Year: | 2004 |
Journal: | Water, Air, and Soil Pollution |
Volume (Issue): | 154 (1-4) |
Pages: | 271-293 |
Article ID: | |
DOI: | 10.1023/B:WATE.0000022973.60928.30 |
URL (non-DOI journals): | |
Model: | SWAT |
Broad Application Category: | hydrologic and pollutant |
Primary Application Category: | tile drainage effects and/or processes |
Secondary Application Category: | depressional (pothole, wetland or pond) effects and/or processes |
Watershed Description: | 51.3 km^2 Walnut Creek, a tributary of the Skunk River located southeast of the City of Ames in Story County in central Iowa, U.S. |
Calibration Summary: | Monthly (1991-98) at watershed outlet: streamflow r2 = .73 nitrate r2 = .56 |
Validation Summary: | |
General Comments: | SWAT streamflow and nitrate discharge at the watershed outlet was found to be in accordance with observed data. Seven N fertilizer scenarios (% deviations from 152 kg/ha N reference rate) and lanuse scenarios, including winter wheat replacing corn-soybean and fertilized pasture scenarios, were performed. Decreasing N rates by 20, 40, & 60% in corn-soybean fields reduced N losses by 22, 50, & 95%. |
Language: | English |
Keywords: | erosion, hydrologic modeling, hydrology, land-use, management practices, nitrogen, scenarios, SWAT |