[1]余斌,马煜,张健楠,等.汶川地震后四川省都江堰市龙池镇群发泥石流灾害[J].山地学报,2011,(06):738.
　YU Bin,Ma Yu,ZHANG Jiannan,et al.The Group Debris Flow Hazards after the Wenchuan Earthquake in Longchi, Dujiangyan, Sichuan Province[J].Mountain Research,2011,(06):738.
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汶川地震后四川省都江堰市龙池镇群发泥石流灾害()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2011年06期
页码:
738
栏目:
山地学报
出版日期:
2011-01-01

文章信息/Info

Title:
The Group Debris Flow Hazards after the Wenchuan Earthquake in Longchi, Dujiangyan, Sichuan Province
作者:
余斌;马煜;张健楠;吴雨夫;张惠惠;李丽;褚胜名;亓星;
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，四川 成都 610059
Author(s):
YU Bin;  Ma Yu;  ZHANG Jiannan;  WU Yufu;  ZHANG Huihui;  LI Li;  CHU Shengming;  QI Xing
State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
关键词:
龙池; 龙溪河; 群发; 泥石流; 地震
Keywords:
Longchi;  Longxi River;  group; debris flow; Wenchuan Earthquake
分类号:
P64223
文献标志码:
A
摘要:
在2008-05-12汶川地震后的极震区暴发了多处群发性泥石流灾害,龙溪河流域的龙池"8.13"群发泥石流灾害就是其中之一。龙溪河流域在2010-08-13遭遇强降雨过程,流域内共有45处暴发泥石流,其中34处沟谷泥石流,11处坡面泥石流,泥石流冲出总量共334×104 m3,造成大量泥沙淤积在龙溪河下游河道内,该段河床平均淤高5 m。诱发"8.13"群发泥石流的最大1 h降雨量达75 mm,相当于20 a一遇的1 h降雨量。"8.13"群发泥石流中88.9%的泥石流活动集中在汶川地震发震断裂带附近3 km范围内,仅有11.1%的泥石流分布在距汶川地震发震断裂带3～5 km范围。除受汶川地震发...
Abstract:
Many group debris flow hazards were triggered by subsequent rainstorm in the Wenchuan Earthquake area after the main shock. Group debris flow hazards in Longchi, Dujiangyan, Sichuan Province is one of these disasters. There were 45 debris flows triggered by heavy rainfall in the catchment of Longxi River on August 13, 2010. In the all 45 debris flows, there were 34 channelized debris flows and 11 debris flows on the slope. The total volume of debris flow was 3.34×106 m3 and plenty of sediment was deposited in the downstream of Longxi River. The rainfall which triggered the debris flows in Longxi River catchment on August 13, 2010 was 75 mm in one hour. It was the same as one hour rainfall of twenty years return period. Most debris flows were distributing in 3 km from the triggering belt of Wenchuan Earthquake, only 11.1% of total debris flows were located in 3-5 km from the triggering belt. The distribution of debris flows were also controlled by the rock characteristics and geomorphology. Most of debris flows are viscous debris flows, only 11.1% of total debris flows were less viscous debris flows. There were 60.0% small scale debris flows and 11.1% large scale debris flows in total debris flows. Most catchments of debris flow were small catchment, 68.9% of total catchments was less than 1 km2, only 6.7% of total catchments was larger than 3 km2. The sediment deposited in Longxi River was controlled by the activity of debris flows, the width of channel, and the slope of channel: there was no sediment deposited in the upper stream of Longxi River, but there was plenty of sediment deposited in the downstream. The size of sediment deposited in Longxi River was partly decided by the rock characteristics of debris flow catchments, as the results the particle sizes were decreasing from upper stream to downstream of Longxi River. The debris flow hazards will be triggered again when it is heavy rainfall in Longxi River catchment. To reduce the hazards of debris flows in the Wenchuan Earthquake area, forecast and prevention work must be done in the next raining season.

备注/Memo

备注/Memo:
收稿日期(Received date)：2011-01-11；改回日期(Accepted)：2011-07-11。
基金项目（Foundation item）：国家自然科学基金（40871054），973项目 (2008CB425801)和地质灾害防治地国家重点实验室自主研究基金(SKLGP2009Z004) 。\[Supported by National Natural Science Foundation（40871054），973 program (2008CB425801) and Independent research foundation of the State Key Laboratory of Geo-hazard Prevention (SKLGP2009Z004).\]
作者简介（Biography）：余斌（1966-），男，四川成都人，教授，博士，主要从事泥石流的形成，运动和堆积以及浊流的沉积研究。\[Yu Bin, male, born in 1966, professor of Chengdu University of Technology, Mainly engaged in debris flows and turbidity currents.\]E-mail:drbinyu@gmail.com
更新日期/Last Update: 1900-01-01