江苏条子泥匡围工程对邻近水道流场影响分析

Analysis on flow field in nearby waterways after Tiaozini reclamation construction in Jiangsu Province

为了预测江苏条子泥匡围工程对周围海域动力环境的影响,利用Mike21软件建立了二维潮流数学模型,对比分析工程实施前后,主要潮汐水道(如西洋、条鱼港、外王家槽)的流场、潮通量变化。结果表明,工程实施后,3条水道涨、落潮流速减小,其中西洋水道变化最明显;围堤前产生横向水流,南北两股潮流在条子泥围堤东侧附近水域辐聚和辐散。西洋水道和条鱼港水道受工程影响较大,潮通量明显减少。匡围区东侧海域的动力环境变化较明显,易引起地形冲淤调整。

In order to predict the impact of Tiaozini reclamation construction on the marine environment, we established a two - dimensional tidal current mathematical model using Mike 21 software. The comparative analysis on changes of flow field and tidal flux in the main watercourse （ Xiyang, Tiaoyugang and Waiwangjiacao） nearby Tiaozini sandbank before and after imple- mentation of the reclamation project was conducted. The results showed that after the reclamation, the flow velocity in three wa- terways decreased during the flooding and ebbing tides, in which, the flow velocity in Xiyang waterway changed the most; the lat- eral flow was discovered in front of the reclamation dam, and the north and south flow trended to convergence and divergence in the east side of the dam. The tidal flux in Xiyang and Tiaoyugang waterways decreased obviously as a result of influence from the project. The dynamic environment in the east side of dam changes obviously, which may cause terrain erosion and deposition var- iation.