【摘要】 建立了渤海、黄海、东海的二维潮流数学模型,对7000a B.P.与3800a B.P.的潮汐、潮流进行了数值模拟。根据计算结果,在7000a B.P.与3800a B.P.时,分别存在以长江河口湾湾顶为顶点向海凸起的独立驻潮波系统,受该独立驻潮波系统的控制,长江河口湾成为外海涨落潮流辐聚、辐散的顶点,长江河口湾中轴线以北,潮流辐聚、辐散的态势与现今南黄海的颇相似。由此推断,从7000a B.P.的末次冰期最大海侵到现代,长江口、苏北岸外的辐射状潮流场一直存在,并没有因江苏海岸变迁发生根本变化。由数值模拟获得的长江口、苏北岸外的古潮流场分布格局也得到现有钻孔揭示的古流向的证实。更多还原

【Abstract】 To reconstruct the paleo-tidal current field in the Subei littoral plain area, a 2 D tidal numerical model has been developed, and the tides and tidal currents in the Bohai, Huanghai and Donghai Seas at 7000a B. P. and 3800a B. P. have been simulated. According to the results, a standing tidal wave system, whose center is the apex of the Yangtze River Estuary and which protrudes towards the sea, exists solitarily at both 7000a B. P. and 3800a B. P. , respectively. The floody tidal currents converge to the Yangtze River Estuary while the ebby tidal currents diverge from it and move to the sea under the control of the standing tidal wave system. The pattern of tidal currents converging or diverging to the north of the central line of the Yangtze River Estuary at 7000a B. P. and 3800a B. P. is approximately similar to the present one. It is deduced from the above that this radial tidal current field has always been existing from 7000a B. P. , which corresponds to the time of maximum marine transgression in the last glacial age, upto now, and it has not fundamentally changed with the changing of the Subei coastline. The paleo-tidal current field obtained from numerical simulation is confirmed by the known field data.更多还原