通过对唐岛湾海域水体进行二维水动力模拟分析,得出了唐岛湾内的潮流运动,并分析了在唐岛湾的东北通道开通前后唐岛湾内的潮位变化与水体运动变化过程,同时计算出了唐岛湾内的海水交换率及海水的半交换期。结果表明,在未开通东北通道时,唐岛湾内水体的单宽流量在涨急和落急时只有2.59 m~2·s~(-1)和2.07 m~2·s~(-1);当开通东北通道时,唐岛湾内的水体整体运动加强,特别是内部水体,唐岛湾内水体的单宽流量在涨急和落急时达到了3.14 m~2·s~(-1)和2.69 m~2·s~(-1),同时唐岛湾内的水体半交换周期也缩短了1.31d,有利于唐岛湾内水质的改善。 Through the two-dimensional hydrodynamic simulation analysis of the waters in the Tangdao Bay, the tidal current movement in the Tangdao Bay is obtained, and the tide level changes and water movement in the Tangdao Bay before and after the opening of the northeast passage in the Tangdao Bay are analyzed. Simultaneously The seawater exchange rate in Tang Island Bay and the half-exchange period of seawater were calculated. The results show that when the Northeast Passage is not opened, the single wide flow in the waters of the Tangdao Bay is only 2.59 m 2 · s -1 and 2.07 m 2 · s -1 at rising and falling events. When the northeast passage was opened, the overall water body movement in Tangdao Bay strengthened. Especially for the internal water body, the single-wide flow of water body in Tangdao Bay reached 3.14 m 2 · s -1 and 2.69 m m ~ 2 · s ~ (-1). Meanwhile, the half-cycle of water body in the island of Tangdao was also shortened by 1.31 days, which was beneficial to the improvement of water quality in the island of Tang Island.