地理科学 ›› 1997, Vol. 17 ›› Issue (1): 24-31.doi: 10.13249/j.cnki.sgs.1997.01.24

• 论文 • 上一篇    下一篇

泥石流的分形特征及其意义

易顺民1, 孙云志2   

  1. 中国地质大学环境科学与工程学院, 武汉430074水利部长江勘测技术研究所, 武汉430011
  • 收稿日期:1995-10-22 修回日期:1996-03-01 出版日期:1997-01-20 发布日期:1997-01-20
  • 基金资助:
    湖北省自然科学基金

THE FRACTAL FEATURES OF DEBRIS FLOW AND ITS SIGNIFICANCE

Yi Shunmin1, Sun Yunzhi2   

  1. 1. Faculty of Environmental Science and Geotechnique, China University of Geosciences, Wuhan 430074;
    2. Changjiang Institute of Geotechnique, Ministry of Water Resources, Wuhan 430011
  • Received:1995-10-22 Revised:1996-03-01 Online:1997-01-20 Published:1997-01-20

摘要: 分析了泥石流流体和堆积物粒度分布的分形结构特征,其分维值介于2~3之间,平均值分别为2.71和2.65左右。研究了泥石流沟水系的分形特征及其在不同观察尺度下分维的变化特征。结果表明,分维可作为描述泥石流粒度成分和泥石流沟水系的参数,反映了泥石流活动的形成演化特征。在此基础上,论述了分维的研究意义。

Abstract: In this paper, fractal structure of granulometric distribution of fluid and accumulation in debris flow are analysed based on fractal theory. The Fractal dimensions values of fluid and accumulation of debris flow are between 2 to 3, and its average values are about 2.71 and 2.65. Fractal feature of water system of debris flow gully and its variational situation of fractal dimensions in different observation scales are studied. The results show that fractal dimension can be taken as a parameter describing granulometric composition of debris flow and water system of debris flow gully, reflecting the evolutional property of debris flow activity. The significance of fractal dimension is discussed.