【摘要】 本文应用不平衡输沙原理，并采用一种集中质量矩阵的“迎风”有限元方法对二维泥沙扩散问题建立了数学模型．该模型对永定新河北塘河口作了数值模拟计算，计算的结果与实测的水位、流速、含沙量过程进行了验证，验证结果是合理的．更多还原

【Abstract】 In the paper, a two dimensional mathematical model for suspended sediment by an upwind finite element with lumped coefficients is put forward based on the theory of nonequilibrium transport of sediment, which has been applied in Beitang, the estuary of the New Youngding River. Computational results of water level, velocity and concentration of suspended sediment demonstrate the principal characteristics of observation.更多还原