研究运用SWAT模型模拟了非点源污染最佳管理措施在丹江口水库流域的减排效果.在综合考虑了各项措施的成本、占用耕地程度、控制效果等因素后,在不同等级坡度区域下运用基于信息熵的多属性决策方法对措施进行综合评价优选.根据优选结果,提出建议:在25°区域以退耕还林措施为主.研究为丹江口水库流域非点源污染最佳管理措施的实施提供了明确实际的决策支持.

SWAT model was utilized to simulate the results of Best Management Practices (BMPs) for non-point source (NPS) pollution in Dangjiangkou Reservoir basin. Cost, change of cultivated land area and reduction of non-point source pollution load of each BMP as well as the pollution reduction was taken into consideration when conducting the management practices optimization in different slope-degree zones. Multiple attribute decision making based on information entropy was applied to optimizing BMPs. Crop residual cover, contour ploughing and no-tillage were suggested to be conducted in region with slope degree less than 5°. In the zone with slope degree from 5° to 15°, terrace was demonstrated to be the most effective practice. This research also stated that hedgerows was firstly suggested to conducted in 15°~25° zone, while crop residual cover was another prior practice in this area. Conversion of cropland to forest had superiority as the best management practice in >25° area. This research provided decision making support for BMPS for NPS pollution reduction in Danjiangkou Reservoir basin.