Initiation mechanisms and dynamics of a debris flow originated from debris-ice mixture slope failure in southeast Tibet, China
Glacial debris flows are a common catastrophic hazard in alpine regions due to glacier recession and permafrost thawing. They are frequently triggered by heavy rainfall and outburst floods. To date, studies on debris flows originated from debris-ice mixture slope failures triggered by glacier meltin...
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ftunivsthongkong:oai:repository.hkust.edu.hk:1783.1-121017 2023-05-15T16:37:33+02:00 Initiation mechanisms and dynamics of a debris flow originated from debris-ice mixture slope failure in southeast Tibet, China Peng, Dalei Zhang, Limin Jiang, Ruochen Zhang, Shuai Shen, Ping Lu, Wenjun He, Xin 2022 https://repository.hkust.edu.hk/ir/Record/1783.1-121017 https://doi.org/10.1016/j.enggeo.2022.106783 http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=0013-7952&rft.volume=307&rft.issue=106783&rft.date=2022&rft.spage=&rft.aulast=Peng&rft.aufirst=&rft.atitle=Initiation+mechanisms+and+dynamics+of+a+debris+flow+originated+from+debris-ice+mixture+slope+failure+in+southeast+Tibet,+China&rft.title=ENGINEERING+GEOLOGY http://www.scopus.com/record/display.url?eid=2-s2.0-85134411398&origin=inward http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000830776500001 English eng Elsevier https://repository.hkust.edu.hk/ir/Record/1783.1-121017 Engineering Geology, v. 307, 20 September 2022, article number 106783 0013-7952 1872-6917 https://doi.org/10.1016/j.enggeo.2022.106783 http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=0013-7952&rft.volume=307&rft.issue=106783&rft.date=2022&rft.spage=&rft.aulast=Peng&rft.aufirst=&rft.atitle=Initiation+mechanisms+and+dynamics+of+a+debris+flow+originated+from+debris-ice+mixture+slope+failure+in+southeast+Tibet,+China&rft.title=ENGINEERING+GEOLOGY http://www.scopus.com/record/display.url?eid=2-s2.0-85134411398&origin=inward http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000830776500001 Glacial debris flow Debris-ice mixtures Landslide Hazard chain Tibet Plateau Article 2022 ftunivsthongkong https://doi.org/10.1016/j.enggeo.2022.106783 2022-10-21T00:08:02Z Glacial debris flows are a common catastrophic hazard in alpine regions due to glacier recession and permafrost thawing. They are frequently triggered by heavy rainfall and outburst floods. To date, studies on debris flows originated from debris-ice mixture slope failures triggered by glacier melting in low-intensity rainfall conditions are still limited. In this study, a typical glacial debris flow that occurred in September 2020 on the west side of Namcha Barwa in southeast Tibet, China, is taken as a benchmark to reveal the initiation mechanisms and dynamics of debris-ice landslide-debris flow hazard chains. The flow discharge, erosion, entrainment, deposition, and dynamic process of the debris flow are evidenced by both field investigations and numerical simulations with a single-phase cell-based simulation program, Erosion-Deposition Debris Flow Analysis (EDDA) (Chen and Zhang, 2015) and a multi-phase flow model r.avaflow (Pudasaini and Mergili, 2019). This hazard chain was originated from a debris-ice mixture slope failure with a volume of 1.14x 106 m3 in a temperate area under little rainfall. The mobile mixture entrained saturated moraines and water in the ravine channel and rapidly transformed into a viscous debris flow, traveling about 9.78 km and entraining 50% more materials along the path. The peak discharge and frontal flow velocity at the outlet of the ravine reached 4700 m3/s and 11.4 m/s, respectively. About 3.75x 105 m3 of debris deposited on the riverbed and partially blocked the Yarlung Tsangpo, causing severe damage to local infrastructures. This study provides a scientific basis for understanding the evolution process of a debris-ice landslide-debris flow hazard chain and for minimizing its adverse impact on key infrastructures in the region. Article in Journal/Newspaper Ice permafrost The Hong Kong University of Science and Technology: HKUST Institutional Repository Engineering Geology 307 106783 |
institution |
Open Polar |
collection |
The Hong Kong University of Science and Technology: HKUST Institutional Repository |
op_collection_id |
ftunivsthongkong |
language |
English |
topic |
Glacial debris flow Debris-ice mixtures Landslide Hazard chain Tibet Plateau |
spellingShingle |
Glacial debris flow Debris-ice mixtures Landslide Hazard chain Tibet Plateau Peng, Dalei Zhang, Limin Jiang, Ruochen Zhang, Shuai Shen, Ping Lu, Wenjun He, Xin Initiation mechanisms and dynamics of a debris flow originated from debris-ice mixture slope failure in southeast Tibet, China |
topic_facet |
Glacial debris flow Debris-ice mixtures Landslide Hazard chain Tibet Plateau |
description |
Glacial debris flows are a common catastrophic hazard in alpine regions due to glacier recession and permafrost thawing. They are frequently triggered by heavy rainfall and outburst floods. To date, studies on debris flows originated from debris-ice mixture slope failures triggered by glacier melting in low-intensity rainfall conditions are still limited. In this study, a typical glacial debris flow that occurred in September 2020 on the west side of Namcha Barwa in southeast Tibet, China, is taken as a benchmark to reveal the initiation mechanisms and dynamics of debris-ice landslide-debris flow hazard chains. The flow discharge, erosion, entrainment, deposition, and dynamic process of the debris flow are evidenced by both field investigations and numerical simulations with a single-phase cell-based simulation program, Erosion-Deposition Debris Flow Analysis (EDDA) (Chen and Zhang, 2015) and a multi-phase flow model r.avaflow (Pudasaini and Mergili, 2019). This hazard chain was originated from a debris-ice mixture slope failure with a volume of 1.14x 106 m3 in a temperate area under little rainfall. The mobile mixture entrained saturated moraines and water in the ravine channel and rapidly transformed into a viscous debris flow, traveling about 9.78 km and entraining 50% more materials along the path. The peak discharge and frontal flow velocity at the outlet of the ravine reached 4700 m3/s and 11.4 m/s, respectively. About 3.75x 105 m3 of debris deposited on the riverbed and partially blocked the Yarlung Tsangpo, causing severe damage to local infrastructures. This study provides a scientific basis for understanding the evolution process of a debris-ice landslide-debris flow hazard chain and for minimizing its adverse impact on key infrastructures in the region. |
format |
Article in Journal/Newspaper |
author |
Peng, Dalei Zhang, Limin Jiang, Ruochen Zhang, Shuai Shen, Ping Lu, Wenjun He, Xin |
author_facet |
Peng, Dalei Zhang, Limin Jiang, Ruochen Zhang, Shuai Shen, Ping Lu, Wenjun He, Xin |
author_sort |
Peng, Dalei |
title |
Initiation mechanisms and dynamics of a debris flow originated from debris-ice mixture slope failure in southeast Tibet, China |
title_short |
Initiation mechanisms and dynamics of a debris flow originated from debris-ice mixture slope failure in southeast Tibet, China |
title_full |
Initiation mechanisms and dynamics of a debris flow originated from debris-ice mixture slope failure in southeast Tibet, China |
title_fullStr |
Initiation mechanisms and dynamics of a debris flow originated from debris-ice mixture slope failure in southeast Tibet, China |
title_full_unstemmed |
Initiation mechanisms and dynamics of a debris flow originated from debris-ice mixture slope failure in southeast Tibet, China |
title_sort |
initiation mechanisms and dynamics of a debris flow originated from debris-ice mixture slope failure in southeast tibet, china |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://repository.hkust.edu.hk/ir/Record/1783.1-121017 https://doi.org/10.1016/j.enggeo.2022.106783 http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=0013-7952&rft.volume=307&rft.issue=106783&rft.date=2022&rft.spage=&rft.aulast=Peng&rft.aufirst=&rft.atitle=Initiation+mechanisms+and+dynamics+of+a+debris+flow+originated+from+debris-ice+mixture+slope+failure+in+southeast+Tibet,+China&rft.title=ENGINEERING+GEOLOGY http://www.scopus.com/record/display.url?eid=2-s2.0-85134411398&origin=inward http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000830776500001 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_relation |
https://repository.hkust.edu.hk/ir/Record/1783.1-121017 Engineering Geology, v. 307, 20 September 2022, article number 106783 0013-7952 1872-6917 https://doi.org/10.1016/j.enggeo.2022.106783 http://lbdiscover.ust.hk/uresolver?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rfr_id=info:sid/HKUST:SPI&rft.genre=article&rft.issn=0013-7952&rft.volume=307&rft.issue=106783&rft.date=2022&rft.spage=&rft.aulast=Peng&rft.aufirst=&rft.atitle=Initiation+mechanisms+and+dynamics+of+a+debris+flow+originated+from+debris-ice+mixture+slope+failure+in+southeast+Tibet,+China&rft.title=ENGINEERING+GEOLOGY http://www.scopus.com/record/display.url?eid=2-s2.0-85134411398&origin=inward http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=LinksAMR&SrcApp=PARTNER_APP&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000830776500001 |
op_doi |
https://doi.org/10.1016/j.enggeo.2022.106783 |
container_title |
Engineering Geology |
container_volume |
307 |
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106783 |
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1766027846154715136 |