Study on the Water Quality Improvement and Aquatic Ecosystem Restoration Strategies in South Lake,Nanning City
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.
urban lakeswater quality improvementaquatic ecosystem restorationhabitat creationbiomanipulationengineering practice
NETL
NSTL
万方数据
