珠江三角洲一维河网非恒定流悬沙预测模拟

在河网水流三级联合解法的基础上，利用“节点含沙量控制法”，假设节点处冲刷和淤积较小，所有节点的含沙量控制方程可以通过输沙量守恒方程用矩阵形式写出，求解该不规则的稀疏矩阵方程组，得到所有节点处的含沙量；单一河道断面处的含沙量通过单一河流悬沙输运的求解方法获得，从而建立珠江三角洲全流域悬沙预测模型，并用实测资料对该模型进行了率定和验证，验证结果良好．

Prediction model for suspended-sediment transport in unsteady flow in Pearl River network

Based on the three-stage method, a numerical model for suspended-sediment transport in the whole Pearl River Basin was developed by use of the node control method for sediment concentration. It was assumed that the erosion and deposition at the nodes was little, and that the control equations for the sediment concentration at all nodes could be written in the matrix form according to the sediment conservation equation. The sediment concentration at each node was obtained by solution of irregular sparse matrix equations. Furthermore, the sectional sediment concentration of single rivers was calculated with the algorithm for single river suspended-sediment transport. The parameters of the model were calibrated and verified with measured data, and the result was satisfactory.