泥沙研究

基于GIS技术和MIKE21模型，分析铁山港岸线和航道工程引起的冲淤演变及水动力环境变化。结果表明，工程周边水深发生显著变化，0 m和2 m等深线在工程区域常被截断并形成新形态，5 m和10 m等深线往往呈现出贴合航道分布的特征。工程实施后，潮位变化不大，突堤和港池对潮流产生明显的导流作用，航道附近水流归槽现象明显，铁山港东部的涨落潮流向相较于工程前出现逆时针偏转。原深水区因水深变浅导致流速明显增加，拓宽和挖深后的航道流速增大，浅滩和挖深区域的流速减小。工程后进入铁山湾的总潮量减少，进入内湾的纳潮量有所增加，但通过沙田断面的纳潮量减少，安浦港湾的纳潮量变化不大。研究成果可为铁山湾开发与保护提供技术支撑。

Based on GIS technology and the MIKE21 numerical model, the changes in seabed evolution and hydrodynamic environment caused by coastal and navigation channel engineering in the Tieshan Bay were analyzed and simulated. The results show that the implementation of engineering projects leads to significant changes in the surrounding water depth, with the 0 m and 2 m isobaths often being truncated and forming new shapes in the engineering area, while the 5 m and 10 m isobaths tended to align closely with the channel distribution. After engineering construction, the tidal level changes little; however, the breakwaters and harbor basins have a noticeable guiding effect on tidal currents, which leading to a distinct channelization of water flow near the waterways. Additionally, the flood and ebb tidal current in the eastern part of Tieshan Bay show a counter-clockwise shift compared to the pre-engineering phase. The original deep-water zones have experienced significant increases in flow velocity due to shallower depths, while the current speed in the widened and deepened channels increase, and that in the shallows and dredged areas experience decreased. After the construction of the project, the total tidal influx entering the Tieshan Bay decreases, while the tidal influx entering the inner bay increases. However, the tidal influx passing through the Sha Tin section decrease, and that passing the Anpu Port do not change much. The achievements can provide technical support for the development and protection of the Tieshan Bay.