Correlation between chlorophyll-a and related environmental factors based on Copula in Chaohu Lake, China

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Ma, Huiqun^1 ; Wang, Yong^1

Shandong Electric Power Engineering Consulting Institute Corp, LTD., Jinan, China^1

关键词: Environmental factors;    Environmental variables;    Integrated management;    Lake sand reservoirs;    Marginal distribution;    Return periods;    Water environment systems;    Weibull probability distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/4/042076/pdf
DOI  :  10.1088/1755-1315/108/4/042076

来源: IOP

【 摘 要 】

Chlorophyll-A is crucial to characterize the eutrophication status. Return period of Chlorophyll-A is very helpful to the treatment of lakes and reservoirs eutrophication. In this study, the Gumbel-Hougaard Copula method is applied to discern the inherent relationship between chlorophyll-A and environmental variables of Chaohu Lake, China. The result shows that Weibull probability distribution is the preferred marginal distribution for Chl-a, Gamma for TP and TN, Log-normal for SD and CODmn. The sequence of correlation between chlorophyll-A and environmental factors is CODmn, SD, TP and TN. The method proposed here presents an effective tool to analyze the interaction of eutrophic variables in complex water environment system, also could provide reference for integrated management and treatment of lakes and reservoirs.