The influencing factors of groundwater safety at 26 non-sanitary landfill sites in the water-receiving regions of the South-to-North Water Diversion Project in Beijing City were analyzed. A groundwater safety evaluation method based on a combination of the DRASTIC method and the fuzzy comprehensive evaluation method was used in this study. Seven influencing factors, including the groundwater depth, aquifer media type, soil type, vadose zone media type, chloride ion, total hardness, and nitrate, were selected to be the evaluation indices. The weights of the indices were determined with the analytic hierarchy process, and the integrated scores of groundwater safety at 26 non-sanitary landfill sites in the water-receiving regions of the South-to-North Water Diversion Project in Beijing City were calculated. In addition, the safety grades of the groundwater at all the sites were classified as follows: five first-grade sites have the highest groundwater safety, followed by 15 second-grade sites, and six third-grade sites have the lowest groundwater safety.%对北京市南水北调工程受水区26处非正规垃圾场地区地下水安全性的影响因素进行分析,采用DRASTIC方法和模糊综合评判法相结合的地下水安全性评价方法,选取地下水埋深、含水层介质类型、土壤类型、包气带介质类型、氯离子、总硬度和硝酸盐等7个影响因子作为评价指标,并用层次分析法确定各指标权重,最终计算出北京市南水北调受水区26处非正规垃圾场地区地下水安全性评价综合评分值,并划分了各垃圾场地区的地下水安全性等级:5个一级区安全性较高,15个二级区次之,6个三级区地下水安全性最低.
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