[1]乐茂华,朱静,黄勋,等.雍家沟泥石流活动特征与堵江[J].山地学报,2013,(05):573.
　LE Maohua,ZHU Jing,HUANG Xun,et al.Activity Characteristics and Damming of Yongjiagou Debris Flow in Qingping Area after Wenchuan Earthquake[J].Mountain Research,2013,(05):573.
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雍家沟泥石流活动特征与堵江()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2013年05期
页码:
573
栏目:
山地灾害
出版日期:
2013-01-01

文章信息/Info

Title:
Activity Characteristics and Damming of Yongjiagou Debris Flow in Qingping Area after Wenchuan Earthquake
作者:
乐茂华;朱静;黄勋;唐得胜;蒋志林;常鸣;
地质灾害防治与地质环境保护国家重点实验室，成都理工大学，四川 成都 610059
Author(s):
LE Maohua;  ZHU Jing;  HUANG Xun;  TANG Desheng;  JIANG Zhilin;  CHANG Ming
State Key Laboratory of GeoHazard Prevention and GeoEnvironment Protection, Chengdu University of Technology, Chengdu 610059, China
关键词:
汶川震区; 泥石流; 活动特征; 堵江分析; 雍家沟
Keywords:
Wenchuan earthquake area;  debris flow;  activity characteristics;  river damming;  Yongjia gully
分类号:
F127,P96
文献标志码:
A
摘要:
自2008年汶川地震以来,四川省绵竹市清平乡雍家沟已暴发过多场泥石流,造成了严重的堵断公路和堵塞河流事件,其中,2012年"8·18"暴发的泥石流规模最大,造成绵远河全部堵塞。通过分析2010年"8·13"与2012年"8·18"两场泥石流的降雨过程发现,雍家沟暴发泥石流的前期累积雨量在增加,激发雨强在降低。2008年汶川地震导致雍家沟的主沟和支沟内堆积了大量的松散固体物质。野外调查发现,雍家沟多次暴发泥石流的活动路径并不一致,其中,2012年"8·18"泥石流主要沿1号支沟活动,沟道的侵蚀宽度随着与主沟沟口距离的增加而变窄,沟道内剩余堆积体厚度随着距离的增加呈现先增后减的规律,且沟道内的物质...
Abstract:
After the 2008 Wenchuan earthquake, debris flow events constantly occurred in the Yongjia gully, which caused serious incidents of road blocked and river damming. The largest scale event was on August 18, 2012 which simultaneously caused the Mianyuan River totally blocked. After analysis and comparison of the rainfall processes for two debris flow events on August 13, 2010 and August 18, 2012, It is concluded that the accumulated precipitation triggered the debris flows increased but the critical rainfall decreased. After the 2008 Wenchuan earthquake, an abundance of loose coseismic material sources were present in the main channel and branch channel of Yongjia gully. According to detailed site investigations, the active paths of different debris flows were not consistent. The debris flow on August 18, 2012 was mainly occurred in the No.1 branch, which shows that erosion width of the channel is getting narrower and the accumulation thickness is first increased and then decreased with the increase of distance from the main channel outlet. Moreover, the particle size distribution of the debris is random in the channel. In addition, this paper also analyzed the riverblocked probability of Yongjiagou debris flows under the different rainfall frequency. The results indicate that Yongjiagou debris flow event could cause river damming when rainfall frequency greater than 20% of it's return period, even cause the river completely blocked.

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备注/Memo

备注/Memo:
收稿日期(Received date)：2012-10-30；改回日期(Accepted) : 2013-01-11。
基金项目（Foundation item）：国家科技部科技基础性工作专项项目（2011FY110100）和地质灾害防治国家重点实验室自主研究项目（SKLGP2011Z008）。[Supported by National Basic Research (2011FY110100) and Research project of SKLGP(SKLGP2011Z008).]
作者简介（Biography）：乐茂华（1986-），男，江西吉安人，硕士研究生，主要从事泥石流灾害方面研究。[Le Maohua(1986-)，male，Ji’an Jiangxi Province，master student；specialized in research on debris flow hazards.] E-mail：lemaohua@gmail.com
更新日期/Last Update: 1900-01-01