青海省三江源黄河源区地表水水质状况

为了解三江源黄河源区地表水水质状况,于2005-2009年在黄河源设7～13个断面,对黄河源地表水中18项水质指标进行了连续监测和分析。结果表明,高锰酸盐指数、氨氮和总磷含量偏高,略超过GB3838—2002《地表水环境质量标准》中Ⅰ类标准,超标主要是由黄河源特殊的自然条件引起,不属于外源人为污染;5日生化需氧量(BOD5)、化学需氧量(COD)、氟化物、铜、锌、六价铬、镉、汞、硫化物、挥发酚、氰化物、阴离子表面活性剂、石油类和粪大肠菌群符合GB3838—2002《地表水环境质量标准》中Ⅰ类标准浓度限值。总体而言,三江源黄河源区地表水水质良好,未受到人类活动的明显影响。

Quality of Surface Water in Yellow River Headwater Area of the Origin of Three Rivers in Qinghai Province

18 water quality indexes of surface water from 7~13 sites of Yellow River Headwater Area were monitored and analyzed continuously from 2005 to 2009 to know its water quality.The results showed that permanganate index,ammonia nitrogen content and total phosphorus content slightly exceeded Ⅰ standard of "Surface Water Environment Quality Standard"(GB383822002),which was caused by the special natural conditions of Yellow River Headwater Area and not caused by exogenous artificial pollution.The indexes of biochemical oxygen demand(BOD5),chemical oxygen demand(COD),fluoride,copper,zinc,hexavalent chromium,cadmium,mercury,sulfide,volatile phenol,cyanide,anionic surfactant,petroleum and fecal coliform accorded with the concentration limit of Ⅰ standard of "Surface Water Environment Quality Standard"(GB383822002).In general,the water quality of surface water of Yellow River Headwater Area from the Origin of Three Rivers was good and was not significantly affected by human activities.