Evaluation of Crop Rotation and BMPs on Water Quality and Quantity using SWAT

Author(s): Ni, X.

Corn after soybean is a common crop rotation practices in the Mississippi Delta. Several Best Management Practices are also implemented in the Big Sunflower River Watershed (BSRW). Placement of BMPs and crop rotation practices will affect water quality and quantity in the BSRW. This study will simulate the impacts of different placements of BMPs and corn after soybean rotation in the BSRW using SWAT model. Soil and Water Assessment Tool (SWAT) model was calibrated at Harris Bayou, validated at Bogue Phalia and verified at BSRW using 17 years of stream flow, sediment and nutrient data. Model performances during calibration, validation and verification were ranged from 0.61 to 0.63 for R2, 0.46 to 0.62 for NSE. Results of different crop rotation practices and their effects on water quality and quantity will be evaluated and presented in the conference.

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