洪口水库近年富营养化程度时间分布的研究

Evaluation on time distribution of eutrophicationdegree in Hongkou reservoir in recent years

本文利用洪口水库2016~2019年水质监测数据,通过卡尔森指数方法对该水库的水体富营养化情况进行评价,分析结果表明:2016~2019年水体综合营养状态指数均为中营养,除了2019年水质为Ⅳ类,且总磷超标外,其他年份水质均符合Ⅲ类标准,各点的营养状态指数大多在枯水期(11月)出现峰值,平水期(7月)次之。叶绿素a(Chla)、总磷(TP)和总氮(TN)对水库富营养化影响相对较大,透明度(SD)次之。另外,本文还分析了该水库水体富营养化的变化趋势及原因,并就相关问题提出针对性的对策和建议。

Based on the water quality monitoring data of Hongkou reservoir from 2016 to 2019,the water eutrophication status of Hongkou reservoir was evaluated by Carlson index method,The analysis results show that:the comprehensive trophic state index of water body from 2016 to 2019 is mesotrophic.Except that the water quality in 2019 is class IV and the total phosphorus exceeds the standard,the water quality in other years meets the class III standard.The trophic state index of each point mostly reaches the peak value in the dry season(November),followed by the normal season(July).The contribution of chlorophyll a(Chla),total phosphorus(TP)and total nitrogen(TN)to reservoir eutrophication is relatively large, followed by transparency (SD). At the same time, this paper also analyzes the changetrend and causes of eutrophication in the reservoir, and puts forward the correspondingcountermeasures and suggestions for solving the related problems.