论文部分内容阅读
This paper studies the nature of bank erosion in the Lower Yellow River. Numerical models available for simulating the longitudinal and lateral deformation of a riverbed are compared. Most of them are not applicable to model the bed deformation in the Lower Yellow River. A two-dimensional (2D) composite model consisting of a 2D flow-sediment mathematical submodel and a riverbank retreat and advance submodel is developed to simulate the longitudinal and lateral deformation. The model is validated through an example of the bed deformation process of the Huayuankou-Laitongzhai reach of the Lower Yellow River. The results agree well with the measured data in the water level, velocity fields, and variations of cross-sectional profiles. The model is capable of simulating the longitudinal deformation of a riverbed and the processes of bank retreat and advance, especially the process of bank lateral erosion and failure.
This paper studies the nature of bank erosion in the Lower Yellow River. Numerical models available for simulating the longitudinal and lateral deformation of a riverbed are compared. Most of them are not applicable to model the bed deformation in the Lower Yellow River. A two- dimensional (2D) composite model consisting of a 2D flow-sediment mathematical submodel and a riverbank retreat and advance submodel is developed to simulate the longitudinal and lateral deformation. The model is validated through an example of the bed deformation process of the Huayuankou-Laitongzhai reach of the Lower Yellow River. The results agree well with the measured data in the water level, velocity fields, and variations of cross-sectional profiles. The model is capable of simulating the longitudinal deformation of a riverbed and the processes of bank retreat and advance , especially the process of bank lateral erosion and failure.