改进的DRASTIC模型在地下水易污染性模糊评价中的应用  

Improved DRASTIC model and its applying for the Fuzzy evaluation of groundwater vulnerability

作　　者：郝静[1,2] 张永祥[1,2] 丁飞[1,2] 白玉华[1,2] 任仲宇[1,2] 巩奕成 

机构地区：[1]北京工业大学建筑与工程学院,北京100124 [2]水质科学与水环境恢复工程北京市重点实验室,北京100124

出　　处：《水文地质工程地质》2013年第5期34-39,共6页Hydrogeology & Engineering Geology

基　　金：国家水体污染控制与治理科技重大专项“南水北调中线总干渠水质安全保障关键技术与工程示范”(2009ZX07212-003)

摘　　要：为了有效避免地下水系统遭受污染,保护地下水资源,采用改进的DRASTIC模型对地下水易污染性进行了评价。鉴于DRASTIC模型的诸多缺陷,将模糊综合评价方法运用到模型中,构建了各评价指标于各个级别的最优相对隶属度矩阵;引用语气算子确定指标权重,计算出了研究区样本集的级别特征值向量。将样本的易污染性进行排序,用研究区样段的水质评价结果进行了验证,结果证明,易污染性程度越高的地区综合评价水质越差;为进一步验证评价方法的真实性,将易污染性排序结果与传统DRASTIC法评价排序结果进行对比,两种方法排序一致。可见,本次改进的模型在克服了DRASTIC的诸多缺陷的同时,使得计算结果真实、可靠,且更加体现了计算过程的科学性与合理性。In order to avoid groundwater system to be polluted and to protect groundwater resources,this paper uses the improved DRASTIC model to assess groundwater vulnerability.In view of the limitation of the DRASTIC model,the fuzzy comprehensive evaluation method is applied to the DRASTIC model to establish the optimal relative membership degree matrix of the evaluation index of each level.The tone operator method is used to determine the index weight,the characteristics value vector of each level of the sample set is calculated and the vulnerability samples are sorted.The results are compared with the water quality evaluation results of the samples in the study area.The results show that the higher the level of the vulnerability area,the poor the water quality in the comprehensive evaluation.To verify the authenticity of the improved evaluation method,it is compared with the evaluation results of the improved method and the conventional DRASTIC method.The results of ranking is consistent.It is obvious that,although the improved model overcomes many disadvantages of the DRASTIC model,it is still authentic,and more objective and reliable.

关 键 词：DRASTIC 地下水易污染性 模糊评价 语气算子 

分 类 号：X824[环境科学与工程—环境工程] X523