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| Optimization of Key Parameters for SWAT Model Based on Field Soil Observation |
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| KeyWord:SWAT model; soil observation; parameter calculation; agricultural diffuse pollution |
| Author Name | Affiliation | | OUYANG Wei | School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China | | CAI Guan-qing | School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China | | HUANG Hao-bo | School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China | | HAO Fang-hua | School of Environment, State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China |
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| Abstract: |
| In this study, onsite observed soil data were used to calculate the values of five key soil parameters by physically based mathematical formula and model in the Abujiao River basin in Northeastern China. Then two simulations of agricultural diffuse pollution were performed with SWAT（Soil and Water Assessment Tool） model. One model simulation was based on calibrated parameter values, while the other simulation was based on calculated parameter values. There were considerable differences between calibrated parameter values and calculated ones for SOL_AWC, SOL_K, SOL_BD and USLE_K, but no significant difference found for SOL_CRK. However, two simulations showed no significant difference in the agricultural diffuse loads. They also had similar dynamics both on yearly and monthly scales. Therefore, SWAT model based on observed soil data could be a good simulation on agricultural diffuse pollution, especially in watersheds without monitoring data on hydrology and water quality. |
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