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在研究区地下水资源评价的基础上,系统分析了其地质与水文地质条件,选取了对研究区地下水脆弱性影响最主要的7个因子,建立了DRASTIC地下水脆弱性评价模型.在利用GIS技术对各因子进行分级分析的基础上,对各因子分析结果进行加权叠加分析,得到了地下水脆弱性评价结果.结果表明:受地下水位埋深较浅、含水层介质较好、包气带中无厚层黏性土分布等的影响,地下水脆弱性总体较高,易遭受农业种植、生活污水及工业生产污水渗漏的污染.
Based on the evaluation of groundwater resources in the study area, the paper analyzes the geological and hydrogeological conditions systematically, selects the seven factors which have the most important impact on the groundwater vulnerability in the study area, and establishes the DRASTIC groundwater vulnerability assessment model.Using GIS Based on the grading analysis of each factor, the result of weighted analysis of each factor was analyzed and the groundwater vulnerability assessment results were obtained.The results show that the depth of groundwater table is shallow, the aquifer medium is good, Layer of clay and other distribution of the impact of groundwater vulnerability is generally high, vulnerable to agricultural planting, domestic sewage and industrial production of sewage leakage pollution.