南宁市南湖水质改善与水生态修复策略研究
Study on the Water Quality Improvement and Aquatic Ecosystem Restoration Strategies in South Lake,Nanning City
尚文 1成水平 2叶烽 3夏博宇1
作者信息
- 1. 同济大学建筑设计研究院(集团)有限公司,上海 200092
- 2. 同济大学环境科学与工程学院,上海 200092
- 3. 南京中科水治理股份有限公司,南京 516001
- 折叠
摘要
城市湖泊是生态系统的重要组成部分,由于受人类活动干扰及外源、内源污染物输入等影响,其水生态系统退化,水环境质量恶化.通过对典型城市湖泊——南宁市南湖进行溢流口强化处理与生态净化、污水口设施改造、补水口水质优化、底泥清淤疏浚及水生态系统构建等,使湖区水质提升至地表水Ⅳ类标准,水体透明度提高到1.80 m以上.水生态系统构建是南湖水质改善与水生态修复的核心,通过湖底生境营造,沉水植物群落构建,浮游动物、底栖动物及鱼类投放等,使"藻型"浑水态湖泊生态系统转变为以沉水植物为主的"草型"清水态湖泊生态系统,恢复了水生态系统完整性,水体营养状态由中度富营养转变为中营养,这对国内其他城市湖泊水质改善与水生态修复具有重要借鉴意义.
Abstract
Urban lakes were essential to the ecosystem,but due to human activities and inputs of external and internal pollutants,the aquatic ecosystem degraded,and the water environment quality deteriorated.South Lake in Nanning City was a typical urban lake;by strengthening treatment and ecological purification of overflow outlets,renovating sewage outlet facilities,optimiz-ing water quality at replenishment outlets,dredging sediment,and constructing an aquatic ecosystem,the water quality was improved to surface water quality standard class Ⅳ and the transparency of the water body was increased to over 1.80 m.The construction of the aquatic ecosystem was the core part of water quality improvement and aquatic ecological restoration in South Lake.Through the creation of lake bottom habitats,the construction of submerged plant communities,and the release of plankton,benthic animals,and fish,the algae-type turbid lake ecosystem has been transformed into a grass-type transparent lake ecosystem dominated by submerged plants,the integrity of the aquatic ecosystem was restored,the nutritional status of the lake was changed from moderately eutrophic to moderately eutrophic.These measures have important reference significances in improving the water quality and restoring the aquatic ecosystem for other urban lakes in China.
关键词
城市湖泊/水质改善/水生态修复/生境营造/生物操纵/工程实践Key words
urban lakes/water quality improvement/aquatic ecosystem restoration/habitat creation/biomanipulation/engineering practice引用本文复制引用
出版年
2024
NETL
NSTL
万方数据