广西省柳州鸡喇地下河流域地下水复合污染特征与成因分析

Analysis of Characteristics and Reasons of Groundwater Combined Pollution of Jila Subterranean Stream in Liuzhou,Guangxi Province

在分析广西省柳州鸡喇地下河流域地下水污染源及其主要污染物质的基础上,根据污染物构成及其分布对柳州市南郊地下水进行污染程度评价,认为该区地下水属于无机-有机-重金属复合污染。研究区中无机污染物主要以SO42-和NO3-为主,以面状污染为特征,其污染程度较重;重金属污染物主要为Mn、Fe和Zn,呈点状分布;有机污染物以二氯甲苯、三氯甲苯和六氯苯为主,呈点状分布,兼有面状污染特征。研究区复合污染主要是由于城市化进程加快、城镇经济不断发展和废污水排放量骤增,加之当地基础设施建设、管理水平和居民环保理念相对滞后,水资源意识淡薄,从而导致地下水复合污染问题突出。最后,根据研究区污染原因提出了相应的污染防治对策。

Based on analysis of groundwater resources and primary pollutant of Jila subterranean stream in Liuzhou, Guangxi Province, this paper assesses groundwater pollution degree. The type of combined pollution of karst water of Jila subterranean stream watershed belongs to inorganic-organic-heavy metal combined pollution. The main inorganic pollutants are SO4^2- and NO3^- with the distribution of surface form. The main heavy metal pollutants are Mn, Ire and Zn with distribution of dot shaped. Diehloromethane, Chloroform and Hexachlorobenzene are the main organic pollutants with the distribution characteristics both of dot shaped and surface form. The main pollution source is industrial pollution. The development and prosperity, the behindhand municipal administration and the indifferent environmental protection consciousness in the process of urbanization resulted in the combined pollution of this region in different degree. Finally, the corresponding measures were put forward according to the pollution causes.