| Title: | Evaluation of management alternatives for an agricultural watershed in a sub-humid subtropical region using a physical process based model |
| Authors: | Behera, S. and R.K. Panda |
| Year: | 2006 |
| Journal: | Agriculture Ecosystems and Environment |
| Volume: | 113(1-4) |
| Pages: | 62-72 |
| Article ID: | |
| DOI: | 10.1016/j.agee.2005.08.032 |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic & pollutant |
| Primary Application Category: | pollutant cycling/loss and transport |
| Secondary Application Category: | none |
| Watershed Description: | 973 ha Kapgari (West Bengal state in eastern India) |
| Calibration Summary: | Daily 2002 (rainy season) runoff r2 & E = .94 & .88 sediment r2 & E = .93 & .84 nitrate r2 & E = .93 & .92 total P r2 & E = .92 & .83 |
| Validation Summary: | Daily 2003 (rainy season) runoff r2 & E = .91 & .85 sediment r2 & E = .89 & .86 nitrate r2 & E = .87 & .83 total P r2 & E = .94 & .89 |
| General Comments: | SWAT was applied to the Kapgari watershed during May-Oct. (rainy season) during 2002-2003. Crops simulated were rice, peanut, and maize. The impacts on runoff and pollutant losses are reported for 48 different crop, tillage & fertilizer combination scenarios. It was concluded that rice cannot be replaced by other crops during the rainy season in order to minimize sediment and nutrient losses, and that a lower rates of N & P fertilizer (80/60 N/P vs. 120/80 N/P kg/ha) could be used because rice yields were maintained and nutirent (nitrate & P) pollution was reduced. |
| Language: | English |
| Keywords: | NPS pollution; Hydrology; Water quality; Remote sensing; Land use; SWAT |