基于层次分析法的丹东地区地下水污染防治区划

为查明丹东地区地下水质量与污染现状，提出科学的污染防治区划建议，基于层次分析法原理，选择地下水质量状况、污染现状、天然脆弱性、土地利用状况、地下水资源状况及开采现状为准则层，综合运用模糊评价法、层级阶梯法、DRASTIC法、线性加权函数法和MapGIS空间分析等技术方法开展研究.结果表明：Ⅰ~Ⅲ类水质分布面积占全区面积的91.65%，轻-中度污染水占95.81%，较弱-中等地下水脆弱区域占98.15%，准则层各指标综合评价后全区可划分为重要地下水水源地保护区、自然防护区、一般防护区和重点防护区等4类地下水污染防治保护区.结论：丹东地区总体地下水环境状况良好，但重点防护区内城镇化程度较高，人类活动对地下水环境影响较强，建议地方政府通过定期监测评价水质与水量、改善用水单位取水和排污工艺、合理调配地表水与地下水资源开发等方式加强防护.

REGIONALIZATION OF GROUNDWATER POLLUTION PREVENTION IN DANDONG AREA BASED ON ANALYTIC HIERARCHY PROCESS

To find out the quality and pollution situation of groundwater in Dandong area and put forward scientific suggestions on regionalization of pollution prevention, the criterion layers of groundwater quality, pollution condition, natural vulnerability, land use, resources and exploitation status are chosen to carry out the study with the integrated use of fuzzy evaluation, hierarchy step, DRASTIC, linear weighted function methods and MapGIS spatial analysis technology on the basis of AHP (analytic hierarchy process). The results show that the I-III level water quality accounts for 91.65% of the whole area, slightly-moderately polluted waters cover 95.81%, and weak-middle groundwater vulnerability regions make up 98.15% of the total. According to the comprehensive evaluation, the study area can be divided into four categories of pollution prevention and protection zones, namely important groundwater source, natural, general and key protection zones. It can be concluded that the overall groundwater environment in Dandong area is good. However, with higher urbanization in key protection zone, the human activities have a strong impact on hydro-environment. Therefore, it is suggested that the local government should strengthen protection by regular monitoring and evaluation of water quality and quantity, improve intake and sewage discharge techniques of water users, and allocate the exploitation of surface and groundwater resources rationally.