Trends of Water Quality and Major Environmental Problems of the Inner Lakes of the Dongting Lake District
To investigate the changes of the water quality of Dongting Lake's inner lakes and their major environmental problems serving for the total phosphorus pollution control in Dongting Lake,the water quality type,total phosphorus mass concentration and trends of comprehensive eutrophication state index of 44 typical inner lakes in Dongting Lake district were analyzed based on the water quality monitoring data of inner lake from 2016 to 2021.The results showed that the water quality of Qianlong Lake,Liuye Lake and Houjiang Lake was relatively good,while the water quality of Huarong East Lake,Datong Lake and Beimin Lake was relatively poor.Total phosphorus is the decisive factor of the water quality of the inner lake in Dongting district.In recent years,the continuous pollution prevention and control work has led to the continuous decline of the total phosphorus concentration in the inner lake of Dongting district,the comprehensive eutrophication state index was stable and improving,and the overall water quality of the inner lake has improved significantly.The main causes of pollution in inner lakes such as Huarong East Lake,Datong Lake and Huanggai Lake were examined.Suggestions were put forward to control sources and reduce phosphorus,unblock rivers and lakes,restore water areas,and restore ecology.
inner lakes in Dongting Lake districtwater qualitytotal phosphorusenvironmental problem
NETL
NSTL
万方数据
