引江济巢工程对改善巢湖水质的数值模拟分析

Impacts of the Yangtze River Water Transfer on Water Environment of Lake Chaohu

巢湖受周围城市工业化及农业生产迅速发展的影响,湖区及流域的生态环境发生了巨大变化,尤其是近几年巢湖水质达到重富营养化水平。引江济巢工程是改善巢湖水质的重要工程措施,采用EFDC生态动力学模型模拟了巢湖不同调水流量、调水线路、调水时间对水环境的影响。结果表明,引江济巢工程在一定程度、时间上使巢湖湖区水质发生一定程度的改善,但若入湖水质不达标,调水也增加了巢湖的富营养化风险。

Affected by rapid development of urban industrialization and agricultural production,the ecological environment in the Lake Chaohu basin has been changed greatly,especially resulting in water quality eutrophication in the lake.Water transfers from the Yangtze River to Chaohu Lake is an important engineering measure to improve the water quality of Chaohu Lake.An ecological dynamics model EFDC was used to assess the impact of discharge,route and duration of water transfer on water environment.The results show that the water transfers improves water quality of Chaohu Lake to a certain degree.But the water transfer would increase the risk of eutrophication in Chaohu Lake if inflow water was not cut down to a reasonable water quality level.