长江河道分形与流域构造特征的关系

河道的自组织结构具有典型的重分形，传统的长度法难以揭示河道形态变化的局域特征，本文提出了连续迭移知名度法，将河道沿着伸展方向依据其特征尺度划分为一系列节点，若干个节点组成一个区间，按区间计算分维数值，并使区间按节点连续重迭偏移，取得全河道分形维数的离散点值，试验表明，用连续迭移长度法获得的长江河道分维数的变化特征与中国陆域的构造演化、地理、地质要素有着密切的关系。

Relationship between Yangzte riverway fractal and geological structure of the catchment

Self\|organized structure of Riverway has a typical multi\|fractal feature. It is hard to describe the local variety of riverway shape by traditional length method. The article introduced a continual iterative motion length method. According to the characteristic scale, mark off a set of nodes along the stretch direction of the riverway. Some nodes constitute a zone. The fractal dimensions of these zones were calculated and make the zone continual iterative motion along the nodes. Discrete fractal dimensions of each node in the whole riverway was finally obtained. The study indicated that there are close relations between the variety feature of the fractal dimension of Yangzte riverway showed by constant iterative motion length method and the structure evolution, geography, geologic factors of China continent.