太湖水体有机污染与主要环境因子的响应

RESPONDENCE OF THE ORGANIC POLLUTION IN TAIHU LAKE TO THE MAINLY ENVIRONMENTAL FACTORS

根据1987－1988年有关研究资料，分析太湖COD，BOD5和TON的时空变化及其与TOC的关系，研究COD出入湖量和水文气象因子对湖体COD的影响。结果表明，COD是太湖有机污染的重要指标；在不同时期和湖区，其含量差异明显，丰水期低，枯水期高。各湖区污染排列为：五里湖＞梅梁湖＞湖心区＞东太湖。进入太湖有机物量的增减，是COD在湖体中消长的主导因素，但水位和温度等条件因子对有机污染程度亦有重要影响。

Based mainly on 1987- 1988 data, this analysis on the spatio-temporal variationsof COD, BOD and TON of Taihu Lake, the relationship between them and TOC,and the influences of COD inflow and/or outflow of the lake and hydrometeorologicalfactors on COD content there, showed that COD is an important organic indicatorof pollution in Taihu Lake. In different periods and lake regions, the COD variedobviously low during high-water and high during low-water, and that lake regionsin decreasing pollution order was Wuli Lake > Meiliang Lake > the open lake > EastTaihu Lake. The decrease and increase of organic pollutant inflow are dominantfactors in the growth and decline of organic pollution in the lake. However, thewater stage, temperature, and other factors also have important impact.