关键词: MIKE21, 水环境影响, 新沟河, 太湖治理, 长江

Abstract:

The Xingouhe River dredging and extending project is one of the important drainage projects that have been arranged by Comprehensive Management Plan of Water Environment in Taihu Basin that was approved by the State Council. Through the extending project, the 5-year flood or under in Zhiwu region is released into Yangtze River instead of Taihu lake, which would reduce the pollutant input into Meiliang Lake, a sub-lake of Taihu Lake. However, the newly increased drainage of Xingou River will impact Yangtze water environment. A two-dimension flow-pollutant simulation model was established based on MIKE21 and the impact on the water environment of Yangtze River was analyzed. The results show that the adverse effect mainly concentrates in the estuary region of Xingou River and the impact is slight in general and only serious in extreme case. The impact can be mitigated by measures of ecological restoration, operation dispatch and water monitoring.

Key words: MIKE21, water environment impact, Xingou River, Taihu Lake regulation, Yangtze River