论文摘要
Honghu Lake, which is listed in the Ramsar Convention, was found to be contaminated with elevated nutrients to a certain extent.This study investigated the seasonal variation of major nutrients and probabilistic eutrophic state in surface water from Honghu Lake. Average concentrations of total nitrogen（TN）, total phosphorus（TP）, chlorophyll-a（Chl-a）, chemical oxygen demand(CODMn) and transparency（SD） in summer and winter generally exceeded Grade III of the Chinese environmental quality standards for surface water（GB 3838-2002）, with the exception of CODMnin winter. Mean concentrations of Chl-a and CODMn in summer were higher than that in winter, while mean concentrations of TN, TP and SD were slightly higher in winter. The improved probabilistic comprehensive trophic level index（PTLI） method based on stochastic-fuzzy theory was established to evaluate the eutrophic state in Honghu Lake. Compared with the Monte-Carlo sampling method, the Latin Hypercube sampling（LH-TFN） method was selected for the evaluation simulation due to its efficiency and stability. Evaluation results indicated that mean PTLI in summer（69.70） and winter（61.96） were both subordinated to Grade IV（Medium eutrophication）. The corresponding reliability of eutrophication level subordinating to Grade IV in summer was of relatively low reliability（51.27%）,which might mislead decision makers to some extent and suggest recheck. The probabilistic eutrophication level in summer developed with a trend from medium to severe eutrophication. Sensitivity analysis illustrated that CODMnand Chl-a were the priority pollutants in summer, with the contributions to PTLI of 43.3% and 22.5% respectively. Chl-a was the priority pollutant in winter, with the contribution to PTLI up to 51.3%.
论文目录
文章来源
类型: 期刊论文
作者: LI Fei,QIU ZhenZhen,ZHANG JingDong,LIU ChaoYang,CAI Ying,XIAO MinSi,ZHU LiYun
来源: Science China(Technological Sciences) 2019年03期
年度: 2019
分类: 工程科技Ⅱ辑,工程科技Ⅰ辑
专业: 环境科学与资源利用
单位: Research Center for Environment and Health, Zhongnan University of Economics and Law,School of Information and Safety Engineering, Zhongnan University of Economics and Law
基金: supported by the Humanities and Social Sciences Foundation of Ministry of Education of China(Grant No.17YJCZH081),Natural Science Foundation of Hubei Province and the Science and Technology Research Project of Hubei Provincial Education Department(Grant No.B2017601)
分类号: X524;X824
页码: 417-426
总页数: 10
文件大小: 11932K
下载量: 47
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