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Post-earthquake denudation and its impacts on ancient civilizations in the Chengdu Longmenshan region, China
Chen, Ningsheng1; Li, Jun2; Liu, Lihong1; Yang, Chenglin3; Liu, Mei1,4
2018
Source PublicationGEOMORPHOLOGY
ISSN0169-555X
EISSN1872-695X
Volume309Pages:51-59
SubtypeArticle
AbstractThis study characterizes significant changes in denudation and disasters in mountainous areas induced in the humid Chengdu Longmenshan region by the Wenchuan Earthquake in 2008. A study focusing on the Longxi-Baisha River Basin was conducted to investigate the amount of denudation triggered by specific flash flood and debris flow events in 2009-2014. The following results were obtained through a comparison of pre-seismic regional denudation rates and denudation characteristics of other seismically active mountain regions. (1) Regional denudation processes occurred in a wave-like process of initial increase then decline, with a peak exhibiting a hyperbolic attenuation trend. This trend indicates that the denudation rate in the Chengdu Longmenshan region is expected to return to the pre-seismic rate of 0.3 mm a(-1) after 81 years. In 22 years after the earthquake (Year 2030), debris flow disasters are expected to be rare. (2) Disasters increased significantly in the Chengdu Longmenshan region after the Wenchuan earthquake, with an average of 29.5 people missing or dead per year (22 times greater than the pre-earthquake rate) and average economic losses of 192 million Yuan per year (1.6 times greater than the pre-earthquake rate). (3) The denudation process was jointly controlled by the quantities of loose solid material and precipitation after the Wenchuan earthquake. The amount of loose solid material influenced the extent of denudation, while vegetation coverage rates and soil consolidation determined the overall denudation trend in the region, and changes in precipitation led to denudation fluctuations. (4) The results can be used to analyze the relationship between the potential flash flood-debris flow disasters after earthquakes in the ancient Shu kingdom and changes in historical social settlements. The results can also be used to predict denudation processes and disaster risks from earthquakes in humid mountainous regions around the world, such as the southern slope of the Himalayas, Japan and the Taiwan mountains. (C) 2018 Elsevier B.V. All rights reserved.
KeywordDebris flow Flash flood Denudation Migration Humid mountainous regions
DOI10.1016/j.geomorph.2018.02.007
Indexed BySCI
WOS Keyword2008 WENCHUAN EARTHQUAKE ; DEBRIS FLOWS ; SOIL-EROSION ; LANDSLIDES ; MITIGATION ; TAIWAN ; VOLUME ; NEPAL ; AREA
Language英语
Quartile2区
Funding Projectprogram of Increasing Resilience to Natural Hazards in Earthquake Prone Regions in China ; National Natural Science Foundation of China[41661134012] ; National Natural Science Foundation of China[41671112] ; National Natural Science Foundation of China[51409243] ; National Natural Science Foundation of China[41402283] ; 135 Strategic Program of the Institute of Mountain Hazards and Environment, CAS[SDS-135-1705]
TOP
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000430525500005
Funding Organizationprogram of Increasing Resilience to Natural Hazards in Earthquake Prone Regions in China ; National Natural Science Foundation of China ; 135 Strategic Program of the Institute of Mountain Hazards and Environment, CAS
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/21486
Collection山地灾害与地表过程重点实验室
Corresponding AuthorChen, Ningsheng
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China
2.Sichuan Univ Sci & Engn, Sch Civil Engn, Zigong 643000, Peoples R China
3.RMIT Univ, Sch Sci Math & Geospatial Sci, Melbourne, Vic 3000, Australia
4.Univ Chinese Acad Sci, Beijing 100049, 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
Corresponding 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
Chen, Ningsheng,Li, Jun,Liu, Lihong,et al. Post-earthquake denudation and its impacts on ancient civilizations in the Chengdu Longmenshan region, China[J]. GEOMORPHOLOGY,2018,309:51-59.
APA Chen, Ningsheng,Li, Jun,Liu, Lihong,Yang, Chenglin,&Liu, Mei.(2018).Post-earthquake denudation and its impacts on ancient civilizations in the Chengdu Longmenshan region, China.GEOMORPHOLOGY,309,51-59.
MLA Chen, Ningsheng,et al."Post-earthquake denudation and its impacts on ancient civilizations in the Chengdu Longmenshan region, China".GEOMORPHOLOGY 309(2018):51-59.
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