基于DRASTIC的含水层脆弱性模糊评价方法与应用  

Application of the method for fuzzy assessment of aquifer vulnerability based on DRASTIC

作　　者：李绍飞[1] 孙书洪[1] 王勇[2] 

机构地区：[1]天津农学院,天津300384 [2]天津市水文水资源勘测管理中心,天津300061

出　　处：《水文地质工程地质》2008年第3期112-117,共6页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金资助项目(50679055);天津市科技攻关计划重点项目(06YFGZNC06700)

摘　　要：通过分析目前广泛采用的DRASTIC方法存在的主要问题,将含水层脆弱性定义为模糊概念,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含水层脆弱性评价模型。为测试其可靠性,分别将改进模型和传统DRASTIC模型应用于祁县东观镇含水层脆弱性评价中。研究结果表明:改进模型得到的脆弱性等级变化较后者更灵敏,分布范围及变化情况更精确,更能真实反映含水层脆弱性在空间上的连续变化,且计算简便、脆弱性分区图效果直观,丰富和完善了地下水脆弱性评价方法。According to the analysis of the main problems in DRASTIC model, which is used for assessing groundwater vulnerability, the groundwater vulnerability is regarded as a fuzzy and stochastic concept. A modified groundwater vulnerability assessment model was developed, which based on fuzzy theory and an improved AHP method. The modified model and DRASTIC model were both applied to assess the aquifer vulnerability in Dongguan Town. The results derived from the two methods are similar in the whole, but the grade changing of the modified model is more sensitive and the distribution is more precise, which shows the spacial continuous of aquifer vulnerability. So it is consistent with the practical situation and easy to use.

关 键 词：含水层 脆弱性 DRASTIC法 模糊评价 

分 类 号：P641.8[天文地球—地质矿产勘探]