AN OPEN SOURCE GIS-BASED DECISION SUPPORT SYSTEM FOR WATERSHED EVALUATION OF BEST MANAGEMENT PRACTICES

作者：Shao Hui; Yang Wanhong^*; Lindsay John; Liu Yongbo; Yu Zhiqiang; Oginskyy Anatoliy

来源：Journal of the American Water Resources Association, 2017, 53(3): 521-531.

DOI：10.1111/1752-1688.12521

• Soil and Water Assessment Tool
• integrated economic-hydrologic modeling
• best management practice evaluation
• open source GIS
• decision support system

Economic costs, water quantity/quality benefits, and cost effectiveness of agricultural best management practices (BMPs) at a watershed scale are increasingly examined using integrated economic-hydrologic models. However, these models are typically complex and not user-friendly for examining the effects of various BMP scenarios. In this study, an open source geographic information system (GIS)-based decision support system (DSS), named the watershed evaluation of BMPs (WEBs), was developed for creating BMP scenarios and simulating economic costs and water quantity/quality benefits at farm field, subbasin, and watershed scales. This DSS or WEBs interface integrated a farm economic model, the Soil and Water Assessment Tool (SWAT), and an optimization model within Whitebox Geospatial Analysis Tools (GAT), an open source GIS software. The DSS was applied to the 14.3-km(2) Gully Creek watershed, a coastal watershed in southern Ontario, Canada that drains directly into Lake Huron. BMPs that were evaluated included conservation tillage, nutrient management, cover crop, and water and sediment control basins. In addition to assessing economic costs, water quantity/quality benefits, and cost effectiveness of BMPs, the DSS can be also used to examine prioritized BMP types/locations and corresponding economic and water quantity/quality tradeoffs in the study watershed based on environmental targets or budget constraints. Further developments of the DSS including interface transfer to other watersheds are also discussed.

• 出版日期2017-6