摘要
在分析石羊河流域昌宁盆地水文地质条件基础上，系统采集了不同深度（0～140m）的8组岩土样，进行了重金属及盐分含量分析和室内吸附实验，并对测试结果进行聚类分析．结果表明：受区内包气带岩土层对废水中重金属的吸附作用的影响，废水对地下水的影响微弱，包气带对地下水起到了很好的屏障作用；重金属及盐分在地下岩土中的分布明显受地下水、岩性及颗粒大小等影响，并存在两个峰值，即地下水位变动带（地下65～85m深）和多层粉土、粘土层区（地下130～140m深）．
Based on the analysis of hydrogeological conditions of Changning basin in Shiyang River watershed, eight rock groups were collected at different depths （0-140 m） for researching. Their contents of heavy metals and salts were determined, together with laboratory adsorption experiment, and then the test resuits were analyzed with cluster analysis. It is found that because the heavy metals in waste water are adsorbed by the rocks of regional unsaturated zone, the impact of wastewater on groundwater is weak, showing that the vadose zone plays a good decontaminating role to groundwater. The distribution of heavy metals and salt markedly depends on groundwater, rock properties, particle size and so on. There are two peak barrier zones, namely the shift zone of groundwater （at the depth of 65-85 m） and the multilayer zone of silt and clay （at the depth of 130-140 m）. This paper has important value in the study of prevention of groundwater pollution in the arid inland basins.
出处
《冰川冻土》
CSCD
北大核心
2008年第1期52-56,共5页
Journal of Glaciology and Geocryology
关键词
重金属
干旱区
内陆盆地
浅层地下水
包气带
heavy metals
arid area
inland basin
shallow groundwater
unsaturated zone
