摘要
以多滑坡泥石流灾害地域云南省为研究对象,利用水系分形维数的空间变化来表征水系空间形态特征的差异,从而折射云南省内滑坡泥石流灾害发生的程度;通过对市、县、子流域和感兴趣区四种不同的分区标准,对滑坡灾害密度、泥石流灾害密度以及滑坡泥石流灾害总密度与它们的水系维数值进行了相关性分析,并且比较了分维数与切割线密度这两种方法,从统计的相关性系数可以得到一个结论:滑坡泥石流灾害区划中,分维数是一个比切割线密度优越的分区指标因子。另外,在计算水系维数时采用的矢量计盒算法,比传统的栅格计盒算法具有更强的优势。
In this paper, the fractional dimension of water system was applied to study the comprehensive regionalization of landslide and debris flow disasters, which could reflect the disastrous degree of landslide and debris flow at Yunnan Province of China. After analyzing the correlation of the dimension value with the density of landslide and debris flow, a conclusion are drawn from the statistical coefficient that dimension is a better factor than the den- sity of dissection line for the comprehensive regionalization of landslide and debris flows. In addition, vector box-counting algorithm was applied in the research to calculate the regional water system dimension, which is a better method than the traditional grid box -counting algorithm.
出处
《自然灾害学报》
CSCD
北大核心
2009年第4期63-71,共9页
Journal of Natural Disasters
关键词
滑坡泥石流
灾害区划
分形
维数
矢量计盒算法
Landslide and debris flows
disaster zoning
fractal
dimension
vector box - counting algorithm
