右江流域下游段地下水污染现状分析评价

Analysis and evaluation of groundwater pollution situation for the lower reaches of Youjiang River Basin

通过对右江流域下游段主要地下河、岩溶泉及受城镇、矿区、农田污染地段的水样采集,依据《地下水质量标准》进行单因子分析和综合评价,得出研究区地下水污染现状和主要污染元素。评价结果显示,研究区岩溶地下水总体水质优良,优良与良好占了98.8%。但局部地下水受点状污染而使NO_(3)^(-)N和氨氮指标较高。今后应加强对工业“三废”的治理,合理规划,建立地下水监测站和监测网,并制定地下水污染防治措施。

In the lower reaches of Youjiang River Basin, water samples were collected from main underground rivers,karst springs and areas affected by towns, mining and agricultural pollution. Single-factor analysis and comprehensive evaluation were conducted in accordance with the Groundwater Quality Standard, based on which the groundwater pollution situation and major pollution elements of the studied area were evaluated. The results of evaluation show that the quality of karst groundwater is generally excellent, taking up 98.8% of water samples, with relatively high NO_(3)^(-)N and NH_(4)^(+)indexes at some local sites. In the future, treatment of three industrial wastes should be strengthened;groundwater monitoring stations and network should be properly planned and constructed;and groundwater pollution prevention and control measures should be drafted.