Formation Conditions and Dynamic Characteristics of Debris Flow Triggered by an Ice Avalanche at Zhibai Gully in Southeast Tibet

Long Fei; Gong Cheng; Huang Hai; Jiao Chengcai

doi:10.13961/j.cnki.stbctb.2022.06.004

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Formation Conditions and Dynamic Characteristics of Debris Flow Triggered by an Ice Avalanche at Zhibai Gully in Southeast Tibet

- Formation Conditions and Dynamic Characteristics of Debris Flow Triggered by an Ice Avalanche at Zhibai Gully in Southeast Tibet
- Bulletin of Soiland Water Conservation Vol. 42, Issue 6, Pages: 31-38(2022)
- 作者机构：
  
  1. 西藏自治区地质环境监测总站,西藏,拉萨,850000
  2. 中国地质科学院探矿工艺研究所,四川,成都,611734
  3. 中国地质大学工程学院,湖北,武汉,430074
  4. 北京欧远致科技有限公司,北京,100085
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2022.06.004
  CLC： P642.3
- Published：2022
- 稿件说明：
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Long Fei, Gong Cheng, Huang Hai, et al. Formation Conditions and Dynamic Characteristics of Debris Flow Triggered by an Ice Avalanche at Zhibai Gully in Southeast Tibet[J]. Bulletin of Soiland Water Conservation, 2022, 42(6): 31-38.
DOI：

Long Fei, Gong Cheng, Huang Hai, et al. Formation Conditions and Dynamic Characteristics of Debris Flow Triggered by an Ice Avalanche at Zhibai Gully in Southeast Tibet[J]. Bulletin of Soiland Water Conservation, 2022, 42(6): 31-38. DOI： 10.13961/j.cnki.stbctb.2022.06.004.

摘要

[目的

]

分析西藏林芝市米林县派镇直白沟2020年9月10日泥石流灾害的形成条件、启动机制和动力特征，为藏东南地区重大工程建设中的冰崩型泥石流灾害的监测预警及风险防控提供科学参考。 [方法

]

综合利用野外调查、多期遥感解译、灾害监测和现场观测等手段，研究了泥石流的启动过程、冲淤特征和灾损情况，计算了动力参数。 [结果

]

“9·10”泥石流灾害是高位冰岩崩驱动形成的，包括3个形成过程： ①受2017年米林地震对岩体震裂作用和冻融循环作用，南侧分水岭发育高位冰岩崩，形成冰岩碎屑流在斜坡冰碛平台运动， ②冰岩碎屑流铲刮斜坡冰碛物与松散岩土体，进入2

支沟运动并沿途携带沟道物质，放大碎屑流规模。 ③通过运动过程中的碰撞摩擦，冰体发生相变，冰岩碎屑流转化为泥石流。 [结论

]

冰崩型泥石流的触发条件、水土耦合过程和动力特征均异于常规冰川降雨复合型泥石流，其动力参数受启动点高势能和运动中冰水相变作用影响，与现有计算方法所得结果具有极大差异。未来对冰川泥石流灾害防治研究不能直接采用现有降雨型泥石流动力参数计算方法，应基于泥石流启动机制来分析动力参数。

Abstract

[Objective] The formation conditions

initiation mechanism and dynamic characteristics of the glacial debris flow disaster occurred on September 10

2020 at Zhibai gully in Linzhi City of Tibet

were analyzed in order to provide scientific reference for the early warning and risk prevention in the construction projects in Southeast Tibet. [Methods] The initiation process

erosion-sediment characteristics and destruction of the debris flow disaster were identified according to the field survey

remote sensing interpretation

observation

and monitoring. [Results] The drive force of the “9·10” debris flow was the high-altitude rock/ice avalanche. The formation process included three processes: ① Due to the seismic fracturing caused by the Milin earthquake in 2017

and freeze-thaw cycle of high level rock

a rock collapse was developed in the south watershed

triggering ice avalanche and forming ice-rock mass flow moving to the slope moraine platform

② Ice-rock mass flow scraped slope moraine and loose soil materials

entered into the 2# branch gully and carry soil material along the channel bed

amplified disaster scale. ③ Through the collision and friction in the process of movement

the ice undergoes phase changed and drove the ice-rock mass flow to debris flow. [Conclusion] The triggering conditions

water-soil coupling process and dynamics characteristics of the ice avalanche type debris flow are different from those of the other glacial rainfall complex type debris flow

and its dynamics parameters are influenced by the high potential energy at the initiation point and the ice-water phase change during the motion

which are very different from the results obtained by existing calculation methods. In the future

the existing methods for calculating the dynamic parameters of rainfall type mudflow cannot be directly adopted in the prevention and control of glacial mudflow disasters

and the dynamic parameters should be analyzed based on the initiation mechanism of mudflow.

关键词

Keywords

references

崔鹏,郭晓军,姜天海,等."亚洲水塔"变化的灾害效应与减灾对策[J].中国科学院院刊2019,34(11):1313-1321.

邬光剑,姚檀栋,王伟财,等.青藏高原及周边地区的冰川灾害[J].中国科学院院刊,2019,34(11):1285-1292.

Fan Xuanmei, Scaringi G, Korup O, et al. Earthquake-induced chains of geologic hazards:patterns mechanisms and impacts[J]. Reviews of Geophysics, 2019,57(2):421-503.

张祖武,林余辉,姚令侃.地震行波作用下山脊震裂现象的物理机制探讨[J].灾害学,2013,28(2):161-165.

黄润秋.汶川8.0级地震触发崩滑灾害机制及其地质力学模式[J].岩石力学与工程学报,2009,28(6):1239-1249.

崔鹏,陈容,向灵芝,等.气候变暖背景下青藏高原山地灾害及其风险分析[J].气候变化研究进展,2014,10(2):103-109.

温燕林,宋治平,于海英,等.1950年墨脱8.6级巨震前地震活动特征与当前喜马拉雅构造带东段大震危险性对比分析[J].地球物理学进展,2016,31(1):103-109.

张文敬.南迦巴瓦峰跃动冰川的某些特征[J].山地研究,1985,3(4):234-238.

杜榕桓,章书成.西藏古乡沟1953年特大冰川泥石流剖析[C]//中国科学院兰州冰川冻土研究所集刊第4号(中国泥石流研究专辑).北京:科学出版社,1985.

An Baosheng, Wang Weicai, Yang Wei, et al. Process mechanisms and early warning of glacier collapse-induced river blocking disasters in the Yarlung Tsangpo Grand Canyon Southeastern Tibetan Plateau[J]. the Science of the Total Environment, 2021,816:151652.

Li Weile, Zhao Bo, Xu Qiang, et al. More frequent glacier-rock avalanches in Sedongpu gully are blocking the Yarlung Zangbo River in Eastern Tibet[J]. Landslides, 2022,19(3):589-601.

Wei Rongqiang, Zeng Qingli, Davies T, et al. Geohazard cascade and mechanism of large debris flows in Tianmo gully SE Tibetan Plateau and implications to hazard monitoring[J]. Engineering Geology, 2018,233:172-182.

鲁安新,邓晓峰,赵尚学,等.2005年西藏波密古乡沟泥石流暴发成因分析[J].冰川冻土,2006,28(6):956-960.

Liu J J, Cheng Z L, Li Y. Glacier Lake outburst floods of the Guangxieco Lake in 1988 in Tibet China[J]. Natural Hazards & Earth System Sciences Discussions, 2013,1(5):4605-4634.

韩佳东,杨建思,刘莎,等.2017米林M 6.9地震序列监测及南迦巴瓦地震活动性研究[J].地球物理学报,2019,62(6):2059-2069.

Zhao Bo, Li Weile, Wang Yunsheng, et al. Landslides triggered by the Ms 6.9 Nyingchi earthquake China(18 November 2017):Analysis of the spatial distribution and occurrence factors[J]. Landslides, 2019,16(4):765-776.

Chen Chen, Zhang Limin, Xiao Te, et al. Barrier lake bursting and flood routing in the Yarlung Tsangpo Grand Canyon in October 2018[J]. Journal of Hydrology, 2020,583:124603.

黄臣宇,常利军,丁志峰.喜马拉雅东构造结及周边地区地壳各向异性特征[J].地球物理学报,2021,64(11):3970-3982.

高登义,邹捍,王维.雅鲁藏布江水汽通道对降水的影响[J].山地研究,1985,3(4):239-249.

王洋,崔鹏,王兆印,等.泥石流龙头的形成及特征研究[J].水利学报,2017,48(4):473-479.

吴坤鹏,刘时银,郭万钦.1980-2015年南迦巴瓦峰地区冰川变化及其对气候变化的响应[J].冰川冻土,2020,42(4):1115-1125.

Ge Yonggang, Cui Peng, Su Fenghuan, et al. Case history of the disastrous debris flows of Tianmo Watershed in Bomi County, Tibet, China:Some mitigation suggestions[J]. Journal of Mountain Science, 2014,11(5):1253-1265..

屈永平,肖进,潘义为.藏东南地区冰川泥石流形成条件初步分析:以天摩沟冰川泥石流为例[J].水利水电技术201849(12):177-184.

国土资源部地质环境司.DZ/T0220-2006泥石流灾害防治工程勘查规范[S].北京:中华人民共和国国土资源部,2006.

李尧,崔一飞,李振洪,等.川藏铁路林波段冰川泥石流发育动态演化分析及监测预警方案[J].地球科学,2022,47(6):1969-1984.

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