【摘要】 以研究岩溶地区地下水脆弱性评价指标体系、评价方法,为地下水资源保护提供对策为目的,本文以桂林寨底一海洋典型岩溶地下河系统为研究对象,针对西南岩溶区大气降水入渗的特点,选取覆盖层、地形坡度、地貌类型、地层岩性、地质构造、地下水水位埋深、降水量、人类活动8个指标,建立地下水脆弱性评价指标体系;结合地下水质量评价中的加附注评分法,突出地貌类型、地质构造作用的影响力;采用综合指数法,综合考虑各因子的权重,分别对系统内的地下水脆弱性进行评价,并根据系统内水井降雨后COD浓度的变化情况,对2种方法的地下水脆弱性评价结果进行验证评估。评价结果显示,区内地下水极度脆弱区主要分布在人类集中居住的岩溶谷地和洼地中。更多还原

【Abstract】 In order to study karst groundwater vulnerability assessment index system,evaluation methods,and provide measures for the protection of groundwater resources,Guilin Zhaidi-haiyang karst groundriver system was taken as an example.According to the characteristics of the rain into ground in southwest karst area,the cover,terrain slope,landform,lithology,geological structure,groundwater depth,precipitation amount and indicators of human activities are closen to build the groundwater vulnerability assessment index system.The groundwater vulnerability within the system was assessed according to the add notes method of the groundwater quality assessment,highlighting the landforms,and geological tectonic’s influence,and the composite index method,considering the weight of each fator.According to the changes of the COD concentration of the well within the system,the groundwater vulnerability assessment results were verified.The result show that the highly vulnerable area is mainly distributed in the human living karst valleys and depressions.更多还原