Characteristics of Low-frequency Debris Flow in Mountain Area of Western Sichuan Province

LIN Ming-an; WANG Shi-ge; FAN Xiao-ling; LU Cheng-yun

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Characteristics of Low-frequency Debris Flow in Mountain Area of Western Sichuan Province

- Characteristics of Low-frequency Debris Flow in Mountain Area of Western Sichuan Province
- Bulletin of Soiland Water Conservation Vol. 29, Issue 1, Pages: 227-230(2010)
- 作者机构：
  
  1. 中国科学院水利部成都山地灾害与环境研究所,四川,成都,610041
  2. 中国科学院研究生院资源与环境学院,北京,100049
  3. 北京城建勘测设计研究院有限责任公司,北京,100101
  4. 中国土木工程集团有限公司,北京,100038
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2010
- 稿件说明：
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LIN Ming-an, WANG Shi-ge, FAN Xiao-ling, et al. Characteristics of Low-frequency Debris Flow in Mountain Area of Western Sichuan Province[J]. Bulletin of Soiland Water Conservation, 2010, 29(1): 227-230.
DOI：

LIN Ming-an, WANG Shi-ge, FAN Xiao-ling, et al. Characteristics of Low-frequency Debris Flow in Mountain Area of Western Sichuan Province[J]. Bulletin of Soiland Water Conservation, 2010, 29(1): 227-230. DOI：

摘要

泥石流按其暴发频率分为高频率(每年发生一次或多次)、中频率(数年至30a发生一次)和低频率(30a以上发生一次)泥石流3类。低频率泥石流具有暴发周期长

规模大

危害严重等基本特点。选取川西地区不同频率的泥石流沟道进行对比研究

结果表明

该区低频率泥石流还具有两个典型特征:低频率泥石流流域具有植被覆盖度高

不良地质现象数量少且规模小的特点;低频率泥石流在侵蚀过程中以沟床冲刷为主且侵蚀速度快

泥砂输移比高。关于低频率泥石流上述两点特征的研究

对泥石流的预防和治理有重要指导意义。

Abstract

Debris flow can be divided into three types according to its outbreak frequency:high-frequency( one or many times in a year)

medium-frequency(one time in several to 30 years)

and low-frequency(one time in more than 30 years).Low-frequency debris flow often burst fiercely without any anticipation and cause serious harm.Based on the analysis of the data from debris flow gullies with different outbreak frequencies

the characteristics of low-frequency debris flow are summarized.Watersheds with Low-frequency debris flow are characterized by high vegetation coverage and a small number and small-scale of adverse geological phenomena.The groove bed scour of low-frequency debris flow is dominant and erosion rate and sediment transport capacity are high.Understanding the characteristics of low-frequency debris flow has important significance in guiding debris flow prevention.

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