基于AHP-DRASTIC评价模型的无锡市潜水污染风险评价

Risk assessment of phreatic water pollution in Wuxi City based on AHP-DRASTIC evaluation model

潜水是无锡市生产、生活及农业用水的主要来源,潜水的污染风险评价是合理开发利用地下水资源、防止地下水污染的重要基础工作。针对无锡市潜水污染风险评价,文章采用层次分析法(analytic hierarchy process,AHP)与DRASTIC方法相结合的方法,定量和定性相结合分析影响因素的权重,并进行一致性检验,减少了评价过程中人为因素的影响;利用差分法对评价结果进行等级划分并成图。评价结果显示,无锡市大部分潜水污染风险评价等级为中等、较差,部分地区污染风险等级为较好,局部污染风险等级为差或好。

Phreatic water is one of the main water sources for the production, living and agriculture in Wuxi City. The pollution risk assessment of phreatic water is an important basic work for rational development and utilization of groundwater resources and prevention of groundwater pollution. Aiming at the pollution risk assessment of phreatic water in Wuxi City, and based on the analytic hierarchy process(AHP) with DRASTIC model, the weights of the influencing factors are analyzed with quantitative and qualitative method and the consistency of the influencing factors is tested. The method reduces the impact of human factors in the evaluation process. The evaluation results are graded by using difference methods and the final figures are made. The results show that the level of phreatic water risk assessment is medium or poor in most areas, better in some areas and poor or good in local areas.