地下水防污性能评价方法探讨  

A discussion of groundwater vulnerability assessment methods

作　　者：钟佐燊[1] 

机构地区：[1]中国地质大学水资源与环境学院,北京100083

出　　处：《地学前缘》2005年第U04期3-13,共11页Earth Science Frontiers

摘　　要：地下水防污性能评价是环境规划和决策的有用工具,国外已有许多研究,也提出了各种计算防污性能指数模型。文中着重介绍使用最广泛的DRASTIC模型,并指出其不足之处。根据中国情况,提出用DRTA模型评价潜水的防污性能,用DLCT模型评价承压含水层的防污性能。DRTA模型包含有地下水埋深、包气带评分介质、包气带评分介质的厚度和含水层厚度4 个因子;DLCT模型包含有承压含水层埋深、隔水层岩性、隔水层的连续性和隔水层厚度4个因子。Groundwater vulnerability assessment is a useful tool for environmental planning and decision-making. Many studies have been carried out and several vulnerability index models have been developed for assessing groundwater vulnerability worldwide. In this paper we present the widely used DRASTIC model, and point out some inadequacies of the model. Considering the situation in China, we propose a DRTA model for vulnerability assessment of unconfined aquifer, and a DLCT model for vulnerability assessment of confined aquifer.The main factors of the DRTA model are: 1depth to water table, 2rating media of the vadose zone, 3 thickness of rating media in the vadose zone and (4) aquifer thickness. The factors of DLCT model are: 1 depth to confined aquifer, 2lithology of the aquiclude, 3 continuity of the aquiclude and (4) thickness of the aquiclude.

关 键 词：防污性能 地下水 DRASTIC 防污性能指数 

分 类 号：X523[环境科学与工程—环境工程]