长江下游分汊河型内部结构和空间效应的研究

A STUDY ON THE INNER STRUCTURE AND SPATIAL EFF-ECT OF THE BRAIDED PATTERN IN THE LOWER REACHES OF THE CHANG JIANG (YANGZI RIVER)

本文从动力机制着手,对长江下游分汊河型的空间结构、衔接段的功能、动力轴线波模式、以及上下游效应等方面进行了分析研究。认为:分汊河型空间上具有独特的相关性;主流波是水流能量的载体、是上下游效应产生和传递的动力;点型衔接段是上下游效应的转换器;线型衔接可使上下游效应的强度或性质发生变异。长江下游分汊河段整治重点是控制上下游效应传递关键的衔接段。

The authors set about the study on the basis of dynamic mechanism to analyse the inner structure, the function of the joints, the dynamic axis wave model, the effect of upper and lower courses in the braided pattern of the lower reaches of the Chang Jiang (Yangzi River). The conclusion is that there exists a particular interrelation in the space of the braided pattern. The water flow energy is carried by the main current which is the Dower of producing and transferring the effect of the upper and lower courses. The linear joints causes variations of the intensity or character of the effect, while the point-shaped joints are actually a transformer. All these provide a scientific basis for the program and realignment of the whole lower reaches.