[1]朱云波,余斌,王治兵,等.四川德昌茨达“8·24”群发性滑坡型泥石流之地形条件[J].山地学报,2015,(01):108.
　ZHU Yunbo,YU Bin,WANG Zhibing,et al.Topographic Research of GroupOccurring Landslideinduced Debris Flow in Dechang，Sichuan[J].Mountain Research,2015,(01):108.
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四川德昌茨达“8·24”群发性滑坡型泥石流之地形条件()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2015年01期
页码:
108
栏目:
山地灾害
出版日期:
2015-02-01

文章信息/Info

Title:
Topographic Research of GroupOccurring Landslideinduced Debris Flow in Dechang，Sichuan
作者:
朱云波;余斌;王治兵;马敏;亓星;朱渊;
成都理工大学;地质灾害防治与地质环境保护国家重点实验室;
Author(s):
ZHU Yunbo; YU Bin; WANG Zhibing; Ma Min; QI Xing; Zhu Yuan
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection，Chengdu University of Technology，Chengdu 610059，China
关键词:
泥石流; 地形条件; 山坡坡度; 流域面积; 沟床比降; 地形因子
Keywords:
debris flow; topographical conditions; hill slope; basin area; channel gradient;  topographic factor
分类号:
P642.23
文献标志码:
A
摘要:
2004-08-24,四川省德昌县茨达乡暴发了群发性滑坡型泥石流,给当地居民生活和生产造成了严重的损失。此次群发性泥石流范围较小,地质和水文条件比较接近,由此认为地形条件是控制泥石流发育的关键因素。在分析地形条件对滑坡型泥石流形成的影响基础上,从其形成机理出发,选取研究区各沟谷流域面积A,沟床比降J,沟谷两侧斜坡25°~45°坡度所占百分比S等3个重要地形因子进行研究,对比相互关系,建立起此次泥石流暴发的临界曲线和综合地形因子G,G=S×(A/A0)0.15×J0.8,得出在地质和降雨条件都相近似的情况下,地形因子G越大,地形条件越好,越容易暴发泥石流。因此可用G因子划分区域内沟谷泥石流的易发...
Abstract:
A group debris flows by landslides were triggered on August 24, 2004 in Cida, Dechang County，Sichuan,China. The geological and rainfall conditions are roughly the same in the study area because the catchment size is less than 50 km2. The only factor of determination of triggering debris flow must be topographical factor. The basin area A，channel gradient J, and the percentage (S) of catchment area with hill slope of 25°～45° are selected as the topographical parameters. A new factor G=SJ0.8(A/A0)0.15 (A0 is unit area =1 km2) is proposed as a single topographical indicator, which may be used as a threshold for the formation of gully type debris flows by landslides. The probability of debris flow formation increases with increasing G-values. The role of slope is far more important than the role of area of catchment, and the channel gradient. With the topographical factor G, one can divide the risk grade of gully debris flow by landslides. It may be used for other areas with the geological factor and rainfall factor because the relationship is partly from the formation mechanism of gully type debris flow by landslides.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2014-03-03；改回日期(Accepted)：2014-06-05。
基金项目(Foundation item)：中国地质调查局项目(编号:12120113010100)。[China Geological Survey Found ( No．12120113010100).]
作者简介（Biography）：朱云波（1988-），男(汉族)，四川眉山人，硕士研究生，主要从事地质灾害防治及相关工作。[Zhu Yunbo(1988-),male,Han nationality,born in Meishan of Sichuan,graduated student,Undertaking research on geological disasters.] E-mail:842926020@qq.com
更新日期/Last Update: 1900-01-01