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下荆江河流是一个耗散系统,其平面形态具有分形结构,这种分形结构形成的物理机制之一是河流系统内部诸因素之间(如河床与含沙水流)及河流内部与外部环境(如流域)因素之间存在复杂的非线性依存关系和非线性相互作用,系统外界的扰动如洞庭湖顶托或各种人类活动(如沿江围垸)等是下荆江河型突变的触发力量。
The lower Jingjiang River is a dissipative system with a fractal structure in its plane shape. One of the physical mechanisms that form this fractal structure is between the internal factors of the river system (such as riverbed and sandy water) and the internal and external environment of the river River basin), there are complex nonlinear dependencies and nonlinear interactions among the factors. The disturbance from the outside of the system such as Dongting Lake top support or various human activities (such as embankment along the river) are the triggering forces for the next Jingjiang river type mutation.