关键词: 泥沙冲淤, 数值模型计算, ArcGIS, 空间分析, 取水口, 杭州湾南岸电厂

Abstract: The scouring and silting in marine area of water intake is the core factor for level design of water intake of a power plant, on south bank in Hangzhou Bay. On the basis of topographical data in different historical periods, and by considering the law of water and sediment movement, human activities, we analyzed the law and trend of seabed evolution by 2D flow and sediment mathematical model. The results showed that the seabed is part of the south bank shoal; the seabed is in slow siltation chronically regardless of short-term scour effect caused by reclamation, at a deposition rate of around 0.04 meters per year. Seabed siltation is caused by sediment transportation of coastal current and human activities such as sea reclamation. After construction, seabed of water intake area is still in siltation, and the projects to be constructed in nearby area also contribute to siltation of 0.2 meters.

Key words: sediment scouring and silting, numerical model calculation, ArcGIS, spatial analysis, water intake, south bank power station of Hangzhou Bay