<i>Evaluation of BMPs impacts on surface and groundwater using a modeling approach</i>

• DOI: 10.13031/aim.201800130
• Publication Date: 2018-07-30T10:03:21Z
• Authors: Xiaojing Ni; Prem B. Parajuli
• Keywords: SWAT model; Crop Rotation

<b><sc>Abstract.</sc></b> <b>Best management practice (BMP) is a conservational way to prevent non-point source pollution, soil, and water loss from agricultural watersheds. In this study, three BMPs including tail recovery system were evaluated. Satellite imagery analysis was used detect potential ponds within the watershed. Soil assessment tool (SWAT) simulate watershed processes. The model calibrated with R² of 0.59 NSE using 15 years monthly stream flow observations validated up 0.63 0.62. Model simulated results indicated total nitrogen (TN) phosphorus (TP) loading decrease by 46% 21% tillage as compare conventional tillage. Sediment not sensitive crop rotation management. TP loads higher, TN lower under corn-soybean scenario compared continuous corn 45% 67% respectively, while soybean predicted lowest comparing scenario. Tail reduced sediment 7% in average recovered groundwater storage averagely 3.9% based on simulation throughout time period. </b>