现代地质2011，Vol.25Issue(4)：808-812,5.
长江下荆江段分形学特征与河道演化
Fractal Characteristics and Watercourse Evolution of the Lower Jingjiang Segment in Middle Yangtze River
摘要
Abstract
The fractal characteristics were discussed according to the fractal analysis of segments in lower Jingjiang River in this paper. The parameter of dimensions are changing between 1.078 to 1. 23 and are lower than those of Yellow River, Haihe River and Luanhe River and close to those of plain areas in lower Yellow reaches and upper Yangtze reaches. The result indicates the evolution of segment is mature period, which is dis-proportional to other segments of this catchment. This is maybe controlled by its geological settings, especially long-term slow subsidence of Jianghan-Dongting Lake plain. After the watercourse is cut off, the fractal value decreases evidently associated with the simplification of watercourse. The curve cut-off of segment generally occurs between 1. 19 and 1. 23 of dimension. Thus the fractal value can be regarded as an early warning parameter.关键词
河道/地貌演化/分形特征/早期预警/长江/下荆江段Key words
watercourse/ geomorphologic evolution/ fractal characteristic/ early warning parameter/ Yangtze River/ lower Jingjiang segment分类
天文与地球科学引用本文复制引用
罗郧,黄长生..长江下荆江段分形学特征与河道演化[J].现代地质,2011,25(4):808-812,5.基金项目
中国地质调查局“长江中游城市群地质环境调查评价综合研究”项目(1212010914008). （1212010914008）
