Temporal and influencing factors of Caohai water quality from 2013 to 2022
Under the background of fine management of water environment,the analysis of the evolution characteristics of lake water environment is of great significance in the process of water treatment.Based on the monthly water quality monitoring data of Caohai from 2013 to 2022,the temporal variation of water quality in Caohai was analyzed.By using Spearman,Comprehensive Nutrition State Index and Principal Component Analysis,the effects of environmental factors on water quality of Caohai were discussed.The results showed that the concentrations of CODMn,TN and Chla increased significantly,the concentration of NH4+-N showed increased,and the concentration of TP and SD decreased.The comprehensive nutrition index was increasing and the eutrophication was increasing.Principal Component Analysis and Correlation Analysis showed that TN、NH4+-N and CODMn of lake had great impacts on water quality of the lake area.Serious internal pollution,rising temperature,decreasing rainfall and imbalanced aquatic ecosystems had gradually become the main factors affecting the water quality.To improve the water quality of Caohai,comprehensive treatment should be carried out from the aspects of pollution control,hydrological rhythm regulation,fish ecological regulation,aquatic vegetation restoration and ecological dredging.
water qualitycomprehensive nutritional statusprincipal component analysisinfluencing factorsCaohai
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