川西高原生态脆弱区地表水资源水质现状评价

Evaluation on Water Quality of Surface Water Resources in Ecologically Fragile Areas in Western Sichuan Plateau

水质评价对生态系统和人们正常的生产生活起着至关重要的作用.本研究基于2014-2015年川西高原偶曲河上游和下游,降曲河及白玉县、巴塘县、甘孜县、炉霍县、雅江县和小金县乡镇地表水源地水质监测资料,结合单因子污染评价法和内梅罗污染指数法,对川西高原地表水水质现状进行了分析和评价.结果表明,偶曲河和降曲河地表水体未受污染,水质在时间上呈现秋冬季内梅罗污染指数最高,春夏季比较低的变化规律.100处地表饮用水源地,水质清洁水平65%,轻污染水平31%,污染水平4%,地表水源地超标因子主要是总氮、总磷、溶解氧.

Water quality assessment plays an important role in ecosystem and people's normal production and life.Based on the monitoring data of surface water quality from2014 to2015 in the upper and lower reaches of Ouqu River, Jiangqu River and Baiyu County, Batang County, Ganzi County, Luhuo County, Yajiang County and Xiaojin County in the western Sichuan Plateau, the present situation of surface water quality in the western Sichuan Plateau was analyzed and evaluated by single factor pollution evaluation and Nemerow pollution index.Results showed that the surface water of Ouqu river and Jiangqu river were not polluted, and the water quality showed the highest Nemerow pollution index in autumn and winter, and the lower in spring and summer.In the100 surface drinking water sources, the water quality was clean at 65%, light polluted at31% and polluted at 4%, the main pollution factors were total nitrogen, total phosphorus and dissolved oxygen.