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地下水库的建设可以有效改善区域供水的紧张局面,但库区地下水的脆弱性决定了城市供水风险.根据传统DRASTIC评价方法存在的不足和地下水库特征提出了库区地下水脆弱性DRECT评价方法,利用层次分析法确定各因子的权重.并将该方法应用于滹沱河地下水库脆弱性评价中,得出脆弱性评价分区图,分析各分区的脆弱性特征,并与表征地下水污染程度的硝酸盐氮空间分布特征进行对比,发现受人为因素和水文地质条件的影响表现出相反的分布趋势.
The construction of underground reservoir can effectively improve the regional water supply tension, but the vulnerability of groundwater in the reservoir area determines the risk of urban water supply.According to the shortcomings of the traditional DRASTIC evaluation method and the characteristics of underground reservoir, DRECT groundwater vulnerability assessment method is proposed The analytic hierarchy process (AHP) is used to determine the weight of each factor. The method is applied to evaluate the vulnerability of the Hutuo River’s underground reservoir, and the zoning map of the vulnerability assessment is obtained. The vulnerability characteristics of each district are analyzed and compared with the nitrate nitrogen Compared with the spatial distribution characteristics, it is found that the distribution trends are opposite under the influence of human factors and hydrogeological conditions.