关键词: 潮流数学模型, 泥沙数学模型, 整治工程, 长江河口

Abstract: In order to provide reference and guidance for regulating river estuary, we built a tidal flow and sediment numerical model for Yangtze River estuary based on DELFT3D model system. Based on the measured hydrology and sediment data, the model was calibrated and verified. The verification results of a large number of measured data showed that the average accuracy of tidal level, tidal current and sediment concentration simulation can reach 91%,86% and 72% respectively. The model has good simulation accuracy and performs well in the application of Yangtze River estuary regulation planning, project design, construction design and regulation of river channels. This model provides technical support for the decision-making and the design of such regulation projects, which is worthy of further promotion.

Key words: tidal flow numerical model, sediment numerical model, Yangtze River estuary, regulation project