Assessment of Best Management Practices on Hydrology and Sediment Yield at Watershed Scale in Mississippi Using SWAT

The selection and execution of appropriate best management practices (BMPs) in critical areas a watershed can effectively reduce sediment yield. Objectives this research include developing watershed-scale Soil Water Assessment Tool (SWAT) model for the Big Sunflower River Watershed (BSRW), identifying high yield using calibrated validated model, assessing effects various BMPs. efficiency three BMPs, grassed waterways (GWW), vegetative filter strips (VFS), grade stabilization structures (GSS), their combinations reducing yield, were investigated. performed well streamflow (P-factor = 0.72–0.87; R-factor 0.74–1.27; R2 0.60–0.86; NSE 0.60–0.86) total suspended solids (TSS) 0.56–0.89; 0.43–2.83; 0.62–0.91; 0.38–0.91) during calibration validation. simulation individual BMPs revealed that GWW showed highest reduction (up to 44%), followed by VFS 38%) GSS 7%). Two BMPs’ had largest potential 47%) while lowest 42%). Similarly, combination all reduced up 50%. findings study will aid sustainable be valuable managers planners.