| Title: | Sensitivity analysis, calibration, and validations for a multisite and multivariable SWAT model |
| Authors: | White, K.L. and I. Chaubey |
| Year: | 2005 |
| Journal: | Journal of the American Water Resources Association |
| Volume (Issue): | 41(5) |
| Pages: | 1077-1089 |
| Article ID: | |
| DOI: | 10.1111/j.1752-1688.2005.tb03786.x |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic and pollutant |
| Primary Application Category: | calibration, sensitivity, and/or uncertainty analysis |
| Secondary Application Category: | pollutant cycling/loss and transport |
| Watershed Description: | 3,100 km^2 Beaver Reservoir drainage area located in northwest Arkansas, U.S. (calib./valid. was performed for 3 subwatersheds: 362 km^2 Richland Creek, 681 km^2 War Eagle Creek and 1,020 km^2 White River). |
| Calibration Summary: | Monthly (1999 or 2000) r2/E values: flow (6 years) = .41-91/.50-.89 sediment (4 years) = .45-.85/.23-.76 total P (4 years) = .50-.82/.40-.67 nitrate/nitrite (4 years) = .01-.84 /-2.36-.29 |
| Validation Summary: | Monthly (2001 or 2002) r2/E values: flow (5 years) = .77-.91/.72-.87 sediment (2 years) = .69-.77/.32-.45 total P (2 years) = .58-.76/-.29-.76 nitrate/nitrite (2 years) = .59-.71 /.13-.49 |
| General Comments: | A multisite & multivariable analysis using SWAT2000 was performed. A relative sensitivity analysis was performed to identify the most sensitive inputs that influenced both hydrologic and pollutant loss outputs. A multi-objective function was developed on the basis of 3 evaluation statistics: E, r2, & % relative error. SWAT was judged to be a very useful tool for simulating alternative management strategies focused on both hydrologic and water quality responses. However, calibration and validation are important for redcing uncertainity and improving accuracy. |
| Language: | English |
| Keywords: | modeling; water quality; nonpoint source pollution; nutrients; SWAT model; sensitivity analysis; agriculture |