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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。
According to the measured data, the distribution of suspended sediment concentration in Sanmen Bay follows the rule of ραf (v ~ 2 / H) through the corresponding analysis of suspended sediment concentration ρ, velocity v and water depth H; The sea area has good dynamic conditions for transporting suspended sediment into the bay, which is the main source of suspended sediment in Sanmen Bay. The net sediment transport volume of single tide in the whole tidal section shows that the net suspended sediment transport in and out of the sea area is small, The suspended sediment transport in the bay has the tendency of transporting deep troughs to the beach and moving northward and northward, and there is an active exchange with the sediment of the offshore waters. The general trend of the change of Sanmen Bay calculated by frictional flow rate is that the deep trough is slightly affected by erosion, the tidal flat slowly rises and the inlet channel is in dynamic equilibrium.