Nonlinear Dynamical Behavior of the River Meandering Process

最新的基于机械的处理方法在弯管中的流动和侵蚀 表明河流弯曲是一种高度非线性、自催化 一种方法，其中有多种但自组织的曲折几何形状， 独立于水流的变化和 谷底冲积层 非线性在于， 每个时刻的信道配置从先前的信道配置演变为 通道状态与施加于 流动（和相关的边界应力场）由先前的 状态 可以写出一个合适的运动方程， 描述了这种非线性行为的本质。 数值 将进行模拟，以阐明弯曲的多样性 可以在任何时刻发生的形式，以及某些趋势 随着时间的推移，这些形式的重现，是兼容的功能， 蜿蜒的列车，自然产生的非线性的， 过程

Recent mechanically based treatments flow and erosion in bends indicate that river meandering is a highly nonlinear, autocatalytic process wherein diverse, yet self-organized, meander geometries arise independently of variations in flow and erodibility of valley-floor alluvium. The nonlinearity resides in the fact that the channel configuration at each instant evolves from a previous channel state in accordance with mechanical conditions imposed on the flow (and associated boundary stress field) by that previous state. A suitable equation of motion can be written which describes the essentials of this nonlinear behavior. Numerical simulations will be conducted to clarify how the diversity of bend forms that can occur at any instant, and the tendency for certain of these forms to recur over time, are compatible features of meander trains that naturally arise from the nonlinearity of the process.