胶莱人工河道水质点输运轨迹的数值模拟

Numerical simulation of water particle transport trajectory in the artificial Jiaolai Canal

利用二维水动力数学模型模拟胶莱人工河道潮流运动,并分析了胶州湾湾口设置潜堤前后胶莱人工河道水质点的运动轨迹和水位变化过程。结果表明,开通胶莱人工河道能够使黄海的胶东湾海水向渤海的莱州湾输运,但不设置潜堤时从胶州湾到莱州湾的海水输运平均流速较小;设置潜堤后胶州湾水位高于莱州湾水位的时间变长,从黄海到渤海之间的水体输运能够得到加速。计算结果还表明,潜堤顶部与平均水面距离较小时,黄、渤海之间水体输运较快。

Tidal flow of the artificial Jiaolai Canal was simulated by a two-dimensional hydrodynamic model. Lagrangian trajectories of water particles and the variation of water elevation were analyzed with or without consideration of a submerged dike at the entrance of the Jiaozhou Bay. It was shown that the artificial Jiaolai Canal could promote the sea water transport from the Jiaozhou Bay of the Yellow Sea to the Laizhou Bay of the Bohai Sea, but the mean flow velocity was small before submerged dike being built. Had a submerged dike been built, the duration, during which the water level of the Jiaozhou Bay was higher than that of the Laizhou Bay, would become longer and thus speed up the water transport from the Yellow Sea to the Bohai Sea. In addition, if the distance between the top of the submerged dike to the mean water level were small.The water transport from the Yellow Sea to the Bohai Sea would be faster.