我国十大流域片水污染现状及主要特征

首先介绍了我国十大流域片的水资源现状和2000年COD的排放量，然后着重分析了十大流域的水体水质现状及主要污染特征。结果表明：十大流域2203个监测断面中的43．1％超标，尤以辽河、黄河、淮河和海河超标最为严重，而超标断面以超V类为主；主要的超标因子为氨氮和高锰酸盐指数；尽管重金属、氰化物、砷等超标断面相对较少，但其超标断面的污染程度均比较严重，均为超V类。

Status Quo of Water Pollution and Main Characteristics in Ten Watersheds of China

The water resource status quo of 10 Chinese catchments and discharging COD quantity in 2000 were firstly introduced,respectively,and then water quality and main pullution characterisitics were analyzed.The results showed that the 43.1% of 2203 sections exceeded the water quality standard,especially Liaohe river,Huanghe river,Huaihe river and Haihe river,and the majority of them were exceeding V,and the main factors of exceeding standard were NH 3 N and COD Mn .Although there were relatively few sections of exceeding standard to heavy metals,cyanide and arsenic,the water quality in these sections was very serious.