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1 水生态现状1.1 地面水质状况1.1.1 海河流域历年来在河南省4个流域中污染最为严重。如1999年、2000年海河流域符合Ⅰ～Ⅲ类水质标准的河流长度均占本流域评价河流总长度的4.9%、劣于Ⅴ类水质标准的河流长度分别占本流域评价河流总长度的74.6%、73.8%。海河流域卫河水系大部分河流已失去供水功能。1.1.2 海河流域卫河水系不仅污染范围广,而且超标物质多,超标倍数大。水质以耗氧有机污染为主,污染项目主要有氨氮、高锰酸盐指数、挥发酚、溶解氧、化学需氧量、亚硝酸盐等。
1 Status of Aquatic Ecology 1.1 Surface Water Quality 1.1.1 The Haihe River Basin has been the most polluted in the four river basins in Henan Province over the years. For example, in 1999 and 2000, the length of river in the Haihe River Basin that meets Grade I ~ III water quality standards accounted for 4.9% of the total river length assessed in this drainage area. The river lengths inferior to Grade V water quality standards accounted for 74.6% , 73.8%. Most rivers in the Weihe River system in the Haihe River Basin have lost their water supply function. 1.1.2 Haihe River Basin Wei River is not only a wide range of pollution, and more than excessive material, exceed the standard multiple. Water quality is dominated by oxygen-consuming organic pollutants. The main pollutants are ammonia nitrogen, permanganate index, volatile phenol, dissolved oxygen, chemical oxygen demand and nitrite.