Author(s): Xie Xiaojing; Zhang Lu; Luo Xi; Li Xiang; Tang Qiang; Yan Dan; Liu Yuru

Linked Author(s):

Keywords: Zhangdu lake; Water quality improvement; Aquatic ecology restoration

Abstract: To learn the current ecological environment status and existing issues of Zhangdu Lake in Wuhan City, and to restore the aquatic ecosystem, improve water quality, and enhance regional biodiversity, a comprehensive investigation was conducted on the ecological environment and major pollution sources of Zhangdu Lake. The results indicate that the aquatic ecosystem of Zhangdu Lake has significantly degraded due to factors such as lake surface shrinkage, external pollutant discharge, and internal pollutant release, making it difficult to achieve the management targets for water quality. Endogenous pollution contributed 34.25% and 39.62% to total nitrogen and total phosphorus respectively, representing a major cause of water quality exceedance. In addition, the lake is surrounded by embankments on three sides, lacking ecological buffers, which allows pollutants to enter the lake through runoff, forming non-point source pollution. The ongoing practice of extensive aquaculture has led to a severe trend of fish population juvenilization and reduced biodiversity. Additionally, the lake's open surface and strong wind waves hinder the colonization of aquatic plants, complicating ecological restoration efforts. In response to these issues, this paper proposed various measures including on-site treatment of endogenous pollution, implementing slope restoration methods, enhancing water transparency, reducing wind-induced turbulence, etc. Moreover, the ecological restoration demonstration project was conducted, which aimed at ultimately reducing the pollution loads, achieving stable water quality, gradually restoring the aquatic ecology, and finally improving the lake functionality, thereby providing technical support for the long-term ecological restoration of the Zhangdu lake area.

DOI: https://doi.org/10.64697/IAHR-APD2024_P207

Year: 2024