摘要
本文根据实测资料,通过悬沙浓度ρ、流速v和水深H的对应分析,得出了三门湾的悬沙浓度分布遵循着ρ∝f(v^2/H)的规律;同时发现湾外海域有着良好的将悬沙输移入湾的动力条件,是三门湾悬沙来源的主要场所;经全潮单宽净输沙量计算表明:进出海域的悬沙净输移量不大,全湾的悬沙输移具有深槽输向边滩、南进北出的趋势,与口外海域的泥沙存在着活跃的交换。通过摩阻流速计算得到三门湾变化的总趋势是:深槽略受冲刷,滩涂缓慢淤涨,入湾通道处于动态平衡中。
Based on analyses of suspended sediment concentrations (p), current velocities (v) and water depths (H) observed, it is concluded that the suspended sediment concentrations in the Sanmen Bay have followed the distribution law of poc f (v2/ H) .At the same time, it was found that the region off the bay has good conditions for suspended sediments transported into the bay, which is a main place for suspended sediments into the Sanmen Bay. The calculations for the net transportation values of the suspended sediments per unit within a whole tidal period show that the values of suspended matters into or out of the bay are not larger. The tendancy of the suspended sediment transportation in the Sanmen Bay is towards the shoals from the deep troughs, and input in the south and output in the north. The exchanges of the suspended sediments between inside or/ and outside the bay are active. Through the calculations for friction velocities, it was found that the Sanmen Bay tends to slightly erosion in the deep troughs, slowly deposition in the beaches and the balance state in the inlets between the bay and the sea.
出处
《东海海洋》
1991年第3期1-11,共11页
Donghai Marine Science
