IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2014  > Vol11 No.5
Case history of the disastrous debris flows of Tianmo Watershed in Bomi County, Tibet, China: Some mitigation suggestions
Ge Yong-gang1; Cui Peng1; Su Feng-huan1; Zhang Jian-qiang1; Chen Xing-zhang2
Corresponding AuthorGE Yong-gang
2014
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
EISSN1993-0321
Volume11Issue:5Pages:1253-1265
SubtypeArticle
AbstractDebris flows and landslides, extensively developing and frequently occurring along Parlung Zangbo, seriously damage the Highway from Sichuan to Tiebt (G318) at Bomi County. The disastrous debris flows of the Tianmo Watershed on Sept. 4, 2007, July 25, 2010 and Sept. 4, 2010, blocked Parlung Zangbo River and produced dammed lakes, whose outburst flow made 50 m high terrace collapse at the opposite bank due to intense scouring on the foot of the terrace. As a result, the traffic was interrupted for 16 days in 2010 because that 900 m highway base was destructed and 430 m ruined. These debris flows were initiated by the glacial melting which was induced by continuous higher temperature and the following intensive rainfall, and expanded by moraines along channels and then blocked Parlung Zangbo. At the outlet of watershed, the density, velocity and peak discharge of debris flow was 2.06 t/m(3), 12.7 m/s and 3334 m(3)/s, respectively. When the discharge at the outlet and the deposition volume into river exceeds 2125 m(3)/s and 126x10(3) m(3), respectively, debris flow will completely blocked Parlung Zangbo. Moreover, if the shear stress of river flow on the foot of terrace and the inclination angel of terrace overruns 0. 377 N/m(2) and 26A degrees, respectively, the unconsolidated terrace will be eroded by outburst flow and collapse. It was strongly recommended for mitigation that identify and evade disastrous debris flows, reduce the junction angel of channels between river and watershed, build protecting wall for highway base and keep appropriate distance between highway and the edge of unconsolidated terrace.
KeywordDebris Flow Characteristics Hazard Chain Formation Condition Tianmo Watershed
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1007/s11629-014-2579-2
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS KeywordLANDSLIDE DAM BREACH ; SOUTHWESTERN CHINA ; VOLCANIC COMPLEX ; FAILURE ; RIVER ; EROSION ; MORAINE ; RETREAT ; HAZARD ; BANK
Language英语
Quartile4区
TOP
WOS SubjectEnvironmental Sciences
WOS IDWOS:000342223500014
Funding OrganizationKey Program of National Natural Science Found of China(41030742) ; Grand Program of National Natural Science Found of China(41190084)
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7253
CollectionJournal of Mountain Science_Journal of Mountain Science-2014_Vol11 No.5
山地灾害与地表过程重点实验室
Affiliation1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
2.Southwest Univ Sci & Technol, Sch Environm & Resources, Mianyang 621010, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Ge Yong-gang,Cui Peng,Su Feng-huan,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.
APA Ge Yong-gang,Cui Peng,Su Feng-huan,Zhang Jian-qiang,&Chen Xing-zhang.(2014).Case history of the disastrous debris flows of Tianmo Watershed in Bomi County, Tibet, China: Some mitigation suggestions.JOURNAL OF MOUNTAIN SCIENCE,11(5),1253-1265.
MLA Ge Yong-gang,et al."Case history of the disastrous debris flows of Tianmo Watershed in Bomi County, Tibet, China: Some mitigation suggestions".JOURNAL OF MOUNTAIN SCIENCE 11.5(2014):1253-1265.
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