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中文摘要：
通过分析目前广泛采用的DRASTIC方法存在的主要问题，将地下水脆弱性定义为模糊性概念，结合模糊分析评价理论及三标度分两步的层次分析法建立了一套改进的地下水脆弱性评价模型，使得指标定额的确定及权重的分配更具科学性。为测试模型可靠性，将其应用于祁县东观镇地下水脆弱性评价中，并利用GIS软件绘图功能，绘制出脆弱性分布图。评价结果与相关资料显示的实际情况基本吻合，验证了改进DRASTIC模型的合理可靠性，丰富和完善了地下水脆弱性评价方法。
英文摘要：
The vulnerability of groundwater is regarded as a fuzzy and stochastic concept according to an analysis of the main problems in DRASTIC model, which is widely used to assess the vulnerability of groundwater. A modified groundwater vulnerability assessment model is formulated based on the fuzzy theory and an improved AHP method, which make the determination of each index value and the allocation of the weight reasonable. And then it was applied to the evaluation of the vulnerability of groundwater in Dongguan Town, Shanxi Province, as well as GIS. The results show that it is consistent with the practical situation. So it is concluded that the modified model is available and it makes the methods of groundwater vulnerability assessment improved.
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