中文摘要：

为研究黄河口的水沙输移规律,采用基于无结构三角网格下的有限体积法建立了平面二维水沙数学模型.模型中分别采用不同方法处理粘性和非粘性沙的输移源项,并引入经验证的粘性沙输移源项改进公式.采用已有的概化水槽冲淤试验资料对模型进行了验证,然后应用于1982年6月至1983年5月期间黄河口水沙输移的数值模拟,计算得到的潮位过程及冲淤量与实测资料符合较好,结果表明模型能够较好地模拟考虑粘性沙运动的黄河口非均匀沙不平衡输移.最后比较了不同泥沙输移源项处理方式对模拟结果的影响,计算表明在黄河口水沙输移数值模拟中需要采用非均匀沙模型并同时考虑粘性和非粘性泥沙的输移.

英文摘要：

A two-dimensional numerical model is presented,which employs a finite volume method based on an unstructured triangular mesh.In this model,the source terms for the transport of cohesive and non-cohesive sediments are calculated by different methods,respectively.Besides,a validated improved formula of the erosion source term for cohesive sediments is applied.The model was validated against the available observed data obtained from a flume experiment.It is then applied to simulate the processes of hydrodynamic and sediment transport in the Yellow River Estuary（YRE）;and the predictions generally agree with the observed data measured from June 1982 to May 1983,so as to verify the capability of the model to simulate the non-equilibrium transport process of both cohesive and non-cohesive sediments in the YRE.Finally,the effect of different sediment transport treatments on the model capability is further investigated,it is indicated that it is necessary to consider the transport of both cohesive and non-cohesive sediments in the YRE.