Improved DRASTIC Model and Its Applying for the Fuzzy Evaluation of Groundwater Vulnerability
详细信息
- 责任者：Hao Jing (College of Architecture and Civil Engineering ; Beijing University of Technology ; Beijing 100022 ; China) ; Zhang Yongxiang
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2013
- 卷期：40(5)
- 关键词：地下水污染 ; groundwater pollution
- 页码：p.34-39
- 图表：9 tables, 14 refs.
- 分类号：1800
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
摘要
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.
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