关键词: 生态治理; 水质; 城市景观水体; 梅溪湖; 长沙市; 湘江;

Abstract: As the green heart of the Meixi Lake area in Changsha City, Meixi Lake is an urban “sponge” in the core area of the Xiangjiang New District.The stability of the water environment quality of Meixi Lake is the top priority of the development and construction of this area.However, the concentrated development in the Meixi Lake area has led to the rapid expansion of surrounding commerce and catering industry with a large flow of people, which has increased the risk of ecological damage.It also brought a great challenge to the protection of the water environment quality and landscape maintenance of Meixi Lake.In order to improve the water ecological condition of Meixi Lake, we have conducted purification projects for the water body of Meixi Lake using ecological treatment methods such as ecological optimization treatment, various regulation of trophic levels, bi-filtration and bio-absorption of nutrients.After the implementation of the ecological treatment technology, we monitored the water quality of Meixi Lake.The results show that the water quality of Meixi Lake has been improved from Grade Ⅳ to Grade Ⅲ for surface water, initially forming a landscape of “clear water and green banks”.The practice of ecological management and restoration of Meixi Lake can provide technical reference for the construction of related projects in the future.

Key words: ecological treatment; water quality; urban landscape water bodies; Meixi Lake; Changsha City; Xiangjiang River;