海河流域分水系河系污染特征分析

Pollution Characteristics of Water System and River System in Haihe Basin

基于2000—2013年海河流域水质数据,采用统计分析方法,从海河4大水系、7大河系角度探讨了流域水体污染特征及演变趋势。结果表明,各水系之间的污染特征存在显著差异。由北向南水系水质逐渐变差,其中徒骇马颊河水系水质最差,评价年份中几近100%河段处于劣于Ⅲ类。流域北部水质相对较好。海河北系及滦河和冀东沿海诸河约有40%~70%的评价河长水质达到、优于地表水Ⅲ类。整体上,海河流域污染形势依然严峻。

Based on the data of water yield and quality from 2000 to 2013 in Haihe basin, the pollution character- istics of the four water systems and the seven river systems in the basin were discussed using statistics analysis method. Results showed that the pollution characteristics existed significant differences between the systems and the water quality in the whole basin deteriorated from north to south. The water quality of Tuhaimajia river was the worst and the length percent content of polluted rivers with inferior class Ⅲ was kept almost 100%. In the whole basin, water quality of northern river was relatively good. Water quality in about 40% -70% sections of Haihe North, Luanhe and Jidong coastal rivers were kept over class Ⅲ water level. On the whole, the water pollu- tion in Haihe Basin may degrade in the following years.