摘要
通过分析目前国内外地下水脆弱性评价中广泛采用的DRASTIC模型中存在的主要问题,将地下水脆弱性定义为模糊概念,以DRASTIC模型为基础建立模糊综合评判模型。在确定各评判因子的权重时,将信息论中的熵值理论引入该模型,运用信息熵所反映数据本身的效用值计算各评价指标的权重,使得权重的分配有了一定的理论依据。以济宁市地下水脆弱性评价为例,对该模型的可靠性进行了测试。通过与普通DRASTIC模型评价的结果比较表明,基于熵权的改进DRASTIC模型能更真实客观的反映地下水脆弱性。
Based on the analysis of the main problems in DRASTIC model, which is widely used for assessing groundwater vulnerability, the groundwater vulnerability is regarded as a fuzzy concept. Thus, a modified DRASTIC model based on fuzzy comprehensive evaluation method is developed. The weights for evaluation factors in the model are obtained from the avail value of data reflecting the information entropy. By this method the weight allocation is more reasonable. This modified model is applied to analyze the groundwater vulnerability of Jining City, Shandong Province. The comparison of the analysis results shows that the nronosed model is more reasonable and effective than the ordinary DRASTIC model.
出处
《水利学报》
EI
CSCD
北大核心
2007年第1期94-99,共6页
Journal of Hydraulic Engineering
基金
水利部科技创新项目(SCX2003_05)
