采煤塌陷湿地水质与富营养化评价

Evaluation of water quality and eutrophication of coal mining subsidence wetlands

PAH湿地公园作为采煤沉陷区生态修复而设计的生态湿地公园,其修复后的湖泊水质情况备受关注。本研究于2023年10月在PAH北湖布置13个采样点,研究分析了氧化还原电位、水温、pH、溶解氧、电导率、透明度、五日生化需氧量、亚硝酸盐氮、硝酸盐氮、总氮、氨氮、总磷、叶绿素、化学需氧量和高锰酸盐指数共15项指标,对其水质和富营养化进行评价。结果表明,北湖内梅罗污染指数均值为0.86,其水质处于清洁状态。综合营养水平指数均值为59.98,北湖水体整体上处于轻度富营养化和中度富营养化的临界状态,北湖部分理化指标呈明显空间异质性。

As the ecological wetland park designed for ecological restoration of coal mining subsidence areas,the water quality of the restored lake in PAH Wetland Park had attracted much attention.Thirteen sampling points were arranged in the north lake of PAH in October 2023 in this study,and 15 indicators,including redox potential,water temperature,pH,dissolved oxygen,conductivity,transparency,five-day biochemical oxygen demand,nitrite nitrogen,nitrate nitrogen,total nitrogen,ammonia nitrogen,total phosphorus,chlorophyll,chemical oxygen demand,and permanganate index were analyzed,and the water quality and eutrophication of coal mining subsidence wetland were evaluated.The result showed that the mean value of the Mero pollution index in PAH was 0.86,and its water quality was in a clean state.The mean value of the integrated nutrient level index was 59.98,and the north lake was in the state of mild eutrophication as a whole,and some of the physicochemical indicators of the north lake showed obvious spatial heterogeneity.