北方地区岩溶含水层脆弱性评价研究

摘要

According to the Karst aquifer characteristics of the northern region, and based on modified COP method, the northern Karst water vulnerability evaluation model was established, which included index system, weight, and scoring system.The groundwater vulnerability in Karst areas of Shentou spring region in Shanxi Province was evaluated by the model.The result was verified according to the nitrate concentration.The results show that, the high level regions which should be protected intentinonally include exposed limestone areas, leakage rivers, and wellspring areas.The areas with the vulnerability of high grade, medium grade, low grade and extremely low grade, account for 15.9%, 41.2%, 41.5%and 1.4% respectively of the whole spring region.The model can be used as a method of northern Karst water vulnerability evaluation.%根据北方地区岩溶含水层的特征,基于改进的COP法,构建了包括指标体系、权重、评分体系的北方地区岩溶含水层脆弱性评价模型. 运用该模型对山西省神头泉域岩溶含水层脆弱性进行了评价,并将硝酸盐浓度作为依据对评价结果进行了验证. 结果表明:岩溶水脆弱性级别高的区域位于灰岩裸露区、渗漏河道和泉源区,应加强保护;地下水脆弱性级别为高、中等、低、非常低的区域面积分别占泉域总面积的15.9%、41.2%、41.5%、1.4%;构建的评价模型可用于北方地区岩溶含水层脆弱性评价.