西藏拉萨河流域湿地水质分析与评价

Analysis and Evaluation of Water Quality of Plateau Wetlands in Lhasa River Basin

为全面了解西藏拉萨河流域高寒湿地水质状况,对西藏拉萨河流域江夏湿地、雅让湿地、察巴朗湿地、塘嘎郭湿地以及拉萨河进行水质监测,并利用单污染指数法评价单因子对环境产生的等效影响程度,采用综合指数法评价该流域水质综合质量现状。结果表明:拉萨河和雅让湿地铁元素超标,拉萨河和江夏湿地总磷超标,其余各项基本满足《地表水环境质量标准》(GB3838-2002)Ⅲ类水质评价标准,水质总体情况较好。总体上,塘嘎郭湿地水质较好,拉萨河水质较差,说明人为因素对拉萨河流域高原湿地水质状况影响较大。

The water quality of Jiangxia wetland,Yarang wetland,Cabalang wetland,Tanggaguo wetland and Lhasa river in Lhasa river basin was monitored and the integrated water quality status of Lhasa river basin was evaluated by the integrated index method based on the equivalent effect degree of environment evaluated by single-factor pollution index method to overall know water quality of high and cold wetlands in Lhasa river basin of Tibet.The results showed that except that Fe content of Lhasa river and Yarang wetland exceeds the standard and total P content of Lhasa river and Jiangxia wetland exceeds the standard also,other different indexes basically meet the standard of Ⅲ level water quality （GB3838-2002）,which indicates that the water quality of plateau wetlands is good overall.The water quality of Tanggaguo wetland is good and the water quality of Lhasa river is poor,which means that human factor has the important effect on water quality of plateau wetlands in Lhasa river basin.