宁夏沙湖水质评价及水污染特征

Water Quality Assessment and Characteristics of Water Pollution of Sand Lake in Ningxia

为了研究宁夏沙湖的水质状况,于2018年4月18日(春季)、7月22日(夏季)、10月25日(秋季)和2019年1月23日(冬季),在宁夏沙湖设置了9个采样点,采集水样,测定水质指标;采用综合污染指数法,对沙湖水质状况进行综合评价。研究结果表明,宁夏沙湖各采样点的综合污染指数为0.770~0.951,各采样点水体都为中污染水体;污染沙湖水体的主要污染物类型为化合氨、有机化合物、无机和有机氮、磷酸盐。

In order to research the water quality of Sand Lake in Ningxia, 9 water sampling sites were set and water samples were collected on April 18, 2018(spring), July 22(summer), October 25(autumn), January 23,2019(winter). The comprehensive pollution index method was used to carry on the comprehensive evaluation of water quality. The results showed that contents of the comprehensive indexes at the 9 sampling sites in Sand Lake in Ningxia were 0.770-0.951, and the water quality levels were all moderate pollution. The dominant indexes for water quality of Sand Lake in Ningxia were ammonia nitrogen, organic compound,inorganic and organic nitrogen and phosphates. The pollution of the water around bird island was most serious, and the pollution of the water at north side of dam was the lightest.