【摘要】 本文基于已有正交贴体坐标系下的二维水沙模型,考虑河岸植被影响因素,引入植被压力源项,修正水流动量守恒方程;并结合实际提出简单易行的非黏性土崩岸技术,提高计算效率。利用改进模型模拟概化河流演变过程,结果表明改进后模型能较好模拟边岸植被影响下河流演变过程,从而为进一步研究河型转化过程及其控制因素变化规律提供数值模拟手段。更多还原

【Abstract】 This paper presents a 2D mathematical model for fluvial process that is influenced by vegetation and non-cohesive bank erosion.The present work is an improvement over the previously developed model with a body-fitted coordinate system,and this new model adds a momentum source term to account for the impact of vegetation.A simple simulation method was adopted for bank erosion,and simulations were made for a conceptual alluvial channel.The calculated evolution of channel meandering shapes and bed profiles is consistent with the classic theories of channel pattern formation influenced by vegetation.更多还原