陈桥黄河湿地水质状况及不同水体类型富营养化和水华爆发风险评价
周会萍 , 魏景沙 , 邵思佳 , 孙士咏 , 黄艳丽
甘肃农业大学学报 ›› 2025, Vol. 60 ›› Issue (03) : 231 -239.
陈桥黄河湿地水质状况及不同水体类型富营养化和水华爆发风险评价
Water quality of Chenqiao Yellow River Wetland and risk assessment of eutrophication and algal blooms in different water-body types
目的 探索陈桥黄河湿地水环境状况及不同类型水体营养化状态和水华爆发风险,为该区域湿地和水资源保护提供理论依据。 方法 在陈桥湿地选取4种水体类型共10个代表性样点,测定全氮(TN)、全磷(TP)、氨态氮(NH4-N)等10个理化指标及铅、镉等6个重金属指标,进行湿地水质综合污染评价及4种不同类型水体的富营养化和水华爆发风险评价。 结果 研究区不存在重金属污染情况;陈桥湿地大部分样点TN、PT(综合污染指数)较高,属中度污染水平(1.5<PT≤2.0);COD含量在32~112 mg/L之间,湿地受有机物污染较大。库塘湿地TN、NH4-N含量显著较低,核心区湖泊NO3-N含量相对较高;生活污染河TP含量显著高于其他水体、DO含量显著低于其他水体;核心区湖泊EI值达87.96,为重富营养化状态;缓冲区河流、生活污染河、库塘区均为中度营养化状态;核心区湖泊、缓冲区河流、库塘的CN/CP分别为34.33、21.00和25.34,均为磷限制水体;生活污染河CN/CP值为12.06,蓝藻水华爆发风险较高。 结论 陈桥黄河湿地生活污染河、核心区湖泊水质恶化风险较大,需要密切关注。
Objective This study aimed to explore the status of water environment in Chenqiao Yellow River Wetland and the eutrophication status of different types of water bodies,and assess the risk of algal bloom outbreak,providing a basis for the protection of wetlands and water resources in this region. Method A total of 10 representative sampling spots were selected from four types of water bodies in Chenqiao Wetland.Ten physical and chemical indicators,including total nitrogen,total phosphorus,and ammonia nitrogen,as well as six heavy metal indicators such as lead and cadmium,were measured to conduct a comprehensive pollution assessment of wetland water quality and a risk assessment of eutrophication and water bloom outbreak for four different water body types. Result There was no heavy metal pollution found in all representative samples.The comprehensive pollution indexes (TN and PT) of most sampling sites in Chenqiao Wetland were relatively high,belonging to a moderate pollution level (1.5<PT≤2.0).The content of COD varied greatly with a range of 32~112 mg/L,indicating a heavy pollution by organic matter.The content of TN and NH4-N in reservoirs wetland was significantly lower than other water bodies,and the content of NO3-N in core lakes was relatively high.The TP content in the living-polluted river was significantly higher,while DO content was significantly lower than other water bodies.The EI value of the lakes in the core area was up to 87.96,indicating a heavy eutrophication state; and the rivers in buffer area,the living-polluted rivers and the reservoirs showed a moderate eutrophication state.The CN/CP in the core area,the buffer rivers and the reservoirs was 34.33,21.00 and 25.34,respectively,all of which belonged to the phosphorus-restricted water bodies.The CN/CP value of the living-polluted rivers was 12.06,and the risk of cyanobacteria bloom was quite high. Conclusion On the whole,the risk of water quality deterioration in living-polluted rivers and lakes in core areas were relatively high,which needs to pay close attention in the future.
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河南省科技攻关项目(222102320119)
河南省科技攻关项目(222102320196)
河南省科技攻关项目(222102320104)
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