包头市南海湿地水质现状分析与评价
Analysis and evaluation of water quality status in the Nanhai wetland of Baotou
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摘要: 南海湖是包头市唯一的天然湖泊,为了解包头市南海湿地的水质现状,根据南海湿地进出水特点于2015年4-11月合理布点采样,通过检测pH、DO、TN、TP、DP、NO3-N、NO2-N、NH3-N、CODCr、Chl(a)等指标,对湿地水质现状进行分析,并采用污染指数法和营养状态指数法对湿地水体进行评价.结果表明,南海湿地水体达到严重污染级别,根据污染负荷分担率Ki值可知化学需氧量(22.93-45.98)、总氮(27.69-38.10)、总磷(5.93-28.03)对水体的污染最为显著,均超过地表水Ⅴ类标准,监测期间各点位TSI(chla)值均大于53,可知南海湖现已处于富营养状态.Abstract: Nanhai lake is the only natural lake in Baotou.In order to understand the water quality of Nanhai wetland in Baotou, this research sampled influent and effluent water in Nanhai wetland from April to November in 2015, measured the indices of pH, DO, TN, TP, DP, NO3-N, NO2-N, NH3-N, CODCr, Chl(a), etc., and assessed the water quality by pollution index method and nutritional status index method.The results showed that Nanhai wetland had reached the serious pollution level. According to the analysis of the pollution loading (the value of Ki), chemical oxygen demand (22.93-45.98), total nitrogen(27.69-38.10) and total phosphorus(5.93-28.03) polluted the water most seriously, and all of them exceeded the class V standard of surface water. The TSI(chla)value was greater than 53 at every sampling site, so the water of Nanhai lake was in eutrophic state.
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