贵州省河流污染特征及影响因素分析

本文根据2000~2007年的水质监测资料,9296个监测数据,对贵州省水质状况及变化趋势进行了分析。分析结果显示:全省地表水水体总体以Ⅰ~Ⅲ水质为主,污染较重的河流集中在乌江水系和南盘江水系;污染严重的断面均集中在经济发达的城市下游河段;超标断面以劣于V类为主,氨氮为主要超标项目;重金属总镉和总铅超标断面少,均大多为劣于V类;生活污水已成为贵州省最大的水环境污染源;文章还对入库河流污染防治提出了合理化建议。

Analysis of Water Environmental Pollution and Factors Affecting the Main Surface Water System in Guizhou Province

According to the data of water monitoring during 2000~2007,and 9296 monitored data,this study analyzed the variation trends of water quality status of Guizhou Province.The analysis results demonstrated that in Guizhou Province,the general surface water quality largely ranges from the first class to the third class,and the heavily polluted rivers are mainly concentrated in the Wujiang River system and Nanpanjiang River system;the heavily polluted sections are concentrated in the lower reaches of developed cities and towns.The over proof sections are dominated by those inferior to the fifth class with the main over proof pollutant of ammonia nitrogen.The over proof sections of heavy metals(cadmium and lead) are limited,mostly inferior to the fifth class;domestic sewage has become the largest water environment polluted source of Guizhou Province.Rational proposals have been put forward for the prevention and cure of pollution of rivers inflowing into reservoirs in this paper.