引江济太对不同水域氮磷浓度的影响

在国内外调水实践的基础上,运用现状监测资料,具体分析流经望虞河、望亭立交水利枢纽调入太湖的长江水质和太湖不同湖区的水质,研究在调水初期及其后的过程中,氮磷浓度影响水质的变化规律。结果表明:长江水源中总磷、总氮浓度总体上低于贡湖、梅梁湖;长江水在流经望虞河进入太湖的过程中,太湖地区水质随着进水时间的延长而好转,水质浓度与进水流量的大小成反比;"引江济太"调水对迅速抑制太湖蓝藻暴发起到了重要作用。

Influence of water diversion from Yangtze River to Taihu Lake on nitrogen and Phosphorus concentrations in different water areas

After a review of water diversion projects at home and abroad,the quality of water transferred from the Yangtze River along the Wangyu River,across the Wangting Crossroads and,finally,to Taihu Lake,was analyzed along with the water quality of different regions of Taihu Lake based on field data.The variation of the concentrations of nitrogen and phosphorus during the water diversion process was investigated.The results show that the concentrations of total phosphorus and total nitrogen are lower in the Yangtze River than in Gong Lake and Meiliang Lake.The concentration of both nutrients drops with the increase of water diversion time and is inversely proportional to the discharge of transferred water.It is concluded that the water diversion project significantly restrains the blue algal bloom in Taihu Lake.