太湖进出水量变化对水环境的影响

Influences of input and output flow on water environment in Taihu Lake

利用环太湖水文巡测资料和湖西区、澄锡虞区主要入湖口门水质资料,对2000年前后的太湖水环境进行对比分析。结果表明,2000年以来太湖湖西区和澄锡虞区由于受引长江水的影响,入湖水量大增,导致河网污染物大量入湖,使输入太湖的污染物量远远超过其本身的纳污(自净)能力,太湖富营养化有加剧的趋势。建议严格强化陆域控源减排,优化"引江济太"调度方案,适度控制引长江水量,以减少竺山湖、梅梁湖、太湖西部沿岸区乃至整个太湖的污染物入湖量。

A comparison analysis was conducted of the water environment in Taihu Lake before and after the year 2000, based on hydrological data of the lake and water quality data of major inlets of the western lake area and the Chengxiyu area. The results show an increase in the volume of water entering the western lake area and the Chengxiyu area due to water diversion from the Yangtze River to Taihu Lake since 2000. This has caused a large number of pollutants to flow from river nets into the lake and resulted in more significant eutrophication in Taihu Lake. It is suggested that the non-point contamination from the land surface and the water diversion from the Yangtze River to Taihu Lake be controlled to reduce the pollutants entering Zhushan Lake, Meiliang Lake, the west coastal zone, and all of Taihu Lake.