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南湖是一个以游览、养鱼和游泳为主的小型浅水内陆湖，自８０年代以来，富营养化日趋严重，生态平衡遭受严重破坏。为了保护南湖的水体功能必须彻底根治南湖，目的已对南湖采取了（１）点源截流治理工程；（２）小面积放水挖掘方式清淤；（３）生态工程防治及局部辅助化学药剂处理．拟进行的治理技术（１）消除内源清淤治理；（２）控制外源、点源、面源整治；（３）综合生态恢复技术。总投资约２０００万元人民币。
Nanhu is a small, shallow-water inland lake dominated by excursions, fish farming and swimming. Since the 1980s, the eutrophication has been aggravating and the ecological balance has been severely damaged. In order to protect the water body function of South Lake, it is necessary to completely eradicate South Lake. The purpose has been to (1) point source and river closure control project; (2) dredging of small area drainage; (3) ecological engineering and local auxiliary chemical treatment. (1) Elimination of endogenous dredging treatment; (2) Control of exogenous, point source and non-point source remediation; (3) Integrated ecological restoration technology. A total investment of about 20 million yuan.