南黄海辐射沙脊群悬沙特征研究

为了探明南黄海海域悬沙场的特征,以指导港口建设,通过人工神经网络,将平面二维潮流数值模型、天气图和水文测验数据联系起来,构建了平面二维悬浮泥沙模型。首先运用人工神经网络求出实测含沙量与水动力之间的函数关系,再把潮流模型和风场计算值代入此关系式,最后求出该海域含沙量平面分布。模型的计算结果表明:波浪掀沙和水流输沙是整个海域宏观水动力特征;西洋潮流水道处于冲刷状态,有利于深槽的维持;含沙量等值线与等水深线形状大体一致。

Numerical study on distribution of suspended sediment over radial sand ridge field on continental shelf of South Yellow Sea

In order to ascertain the characteristics of suspended sediment and guide the construction of port in South Yellow Sea area,it was necessary to investigate the distribution of the suspended sediment.A model of suspended load was described,which was composed of artificial neural network,2-D tidal current numerical model,weather chart and measured data.Firstly,the function relation between measured sediment concentration and measured water velocity was calculated by the artificial neural network.Secondly,the water depth,flow rate and wind velocity were substituted into the equation.Lastly,the sediment distribution of this area was calculated. The calculation results show that：the hydrodynamic characteristics of this sea are wave-lifting-sand and tidal-current-transporting-sand.Xiyang stays erosional,which is propitious to the maintenance of deep trough.The shape of sediment isoline is similar to the isobath.