Distribution characters of critical rainfall line for the debris flow gully

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Distribution characters of critical rainfall line for the debris flow gully

- Distribution characters of critical rainfall line for the debris flow gully
- Bulletin of Soiland Water Conservation Vol. 8, Issue 6, Pages: 21-26(1989)
- 作者机构：
  
  中国科学院成都山地灾害与环境研究所
- 作者简介：
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- Published：1989
- 稿件说明：
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Tan Wanpei. Distribution characters of critical rainfall line for the debris flow gully[J]. Bulletin of Soiland Water Conservation, 1989, 8(6): 21-26.
DOI：

Tan Wanpei. Distribution characters of critical rainfall line for the debris flow gully[J]. Bulletin of Soiland Water Conservation, 1989, 8(6): 21-26. DOI：

摘要

本文采用聚类分析方法

对35条泥石流沟的临界雨量线进行讨论

找出了它们的分布规律。文中主要依据在泥石流沟观测的雨量资料

加上部分气象站、水文站的雨量资料

计算出雨强和实效雨量后作图。泥石流沟的临界雨量线

呈阶梯状分布。其趋势与泥石流的规模和性质无关

与泥石流沟的流域面积、主沟长度、相对高差和主沟床平均比降等因子关系并不密切;而与泥石流沟形成区的山坡坡度和泥石流发生频率较为密切

特别是它与泥石流提供固体物质的方式最为密切。

Abstract

The critical rainfall lines of 35 debris flow gullies are discussed inthis paper.Their distribution laws are found out by the cluster analysis.According to the rainfall data observed at the debris flow gullies andpartial meteorological observatories or hydrometric stations

the author mo-unted the rainfall intensity and effective rainfall

then draw thechart. The critical rainfall lines of debris flow gullies are distributed inladder. Its tendency has no relation to the scale or the characters ofdebris flow and it is not either closed with the basin area

the length ofthe main gully

relative difference of height and average gradient ofmain gully beds

etc. .However

it has a close relation to the gradient ofslope in the formation region of debris flows and their occurence fre-quences. Especially

it has close relation to the forms of supplying solidmaterial for debris flows.

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