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Distribution law and susceptibility of geohazards across a gradient belt of the Western Sichuan Plateau

Journal of Mountain Science 2024年第6期21卷 1849-1867页

作者： LI Tianbin WANG Jianfeng HE Chaoyang MENG Lubo LI Chaofei MA Junjie WEI Daqiang College of Environment and Civil Engineering Chengdu University of TechnologyChengdu 610059China State Key Laboratory of Geohazard Prevention and Geo-environment Protection Chengdu University of TechnologyChengdu 610059China

Across a gradient belt of the Western Sichuan Plateau,geohazards have seriously limited economic and social *** to incomplete statistics,15,673 geohazards have been recorded in the study *** order to mitigate the threat of geohazards to human engineering activities in the region,an overall understanding of the distribution pattern of geohazards and susceptibility assessment are *** this paper,a gradient belt of the Western Sichuan Plateau and its zoning criteria were ***,on the basis of relief amplitude,distance to faults,rainfall,and human activities,three indicators of endogenic process were introduced:Bouguer gravity anomaly gradient,vertical deformation gradient,and horizontal deformation ***,the distribution patterns of geohazards were investigated through mathematical statistics and ArcGIS *** randomly selecting 10,449 hazards,a geohazard susceptibility map was generated using the Information Value(IV)***,the IV model was validated against 5224 hazards using the Area Under Curve(AUC)*** results show that 47.6%of the geohazards were distributed in the zone of steep *** showed strong responses to distance to faults,human activities,and annual *** distribution of geohazards in the gradient belt of the Western Sichuan Plateau is more sensitive to vertical internal dynamics factors(such as vertical deformation gradient and Bouguer gravity anomaly gradient)without any apparent sensitivity to horizontal internal dynamics *** areas of high and very-high risk account for up to 32.22%,mainly distributed in the Longmenshan and Anning River *** to the AUC plot,the success rate of the IV model for generating the susceptibility map is 76%.This susceptibility map and geohazard distribution pattern can provide a reference for geological disaster monitoring,preparation of post-disaster emergency measures,and town planning.

关键词： Gradient belt geohazards Distribution law Bouguer Gravity anomaly gradient Vertical deformation gradient Susceptibility

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geohazards and risk assessment along highway in Sichuan Province, China

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Journal of Mountain Science 2023年第6期20卷 1695-1711页

作者： YANG Hong-zhi DONG Jia-yu GUO Xu-liang School of Highway Chang’an UniversityXi'an 710064China

geohazards along highways are the main natural hazards that could affect the safety and operation of highway *** the risks faced by highways in areas affected by geohazards is an urgent problem to be *** study used historical geohazard events from Sichuan Province and highway network data to propose a geohazard risk index that reflects the risk geohazards along ***,this work applied the entropy method and expert scoring to calculate the weight of the *** spatial distributions of landslides,debris flows,collapses,and unstable slopes along the highways were analysed based on ArcGIS spatial statistics,and the highway geohazard intensity index were *** relationships between slope,rainfall,vegetation coverage,rock type,land use,and incision depth with geohazards were analysed,and the highway geohazard susceptibility index was calculated by the weighted information *** on the intensity and susceptibility index,we obtained a geohazard risk index which can better evaluate the risk of highways,and made a highway geohazard risk map to aid the prevention and mitigation of geohazards along highways and assist with highway network planning.

关键词： geohazards Highway network Geohazard risk index Intensity index Susceptibility

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A comparative study of the main factors controlling geohazards induced by 10 strong earthquakes in Western China since the Wenchuan earthquake in 2008

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China Geology 2023年第1期6卷 70-84页

作者： Chao Peng Zhi-qiang Yin Xu-jiao Zhang Hai Shao Ming-fei Pang China University of Geosciences(Beijing) Beijing 100029China China Institute of Geo-Environment Monitoring China Geological SurveyMinistry of Natural ResourcesBeijing 100081China China University of Geosciences Wuhan 430074China

Determining the main controlling factors of earthquake-triggered geohazards is a prerequisite for studying earthquake geohazards and post-disaster emergency *** studying these factors,the geomorphic and geological factors controlling the nature,condition,and distribution of earthquake-induced geohazards can be *** insights facilitate earthquake disaster prediction and emergency response *** authors combined field investigations and spatial data analysis to examine geohazards induced by seismic events,examining ten earthquakes including the Wenchuan,Yushu,Lushan events,to elucidate the main control factors of seismic *** authors observed that seismic geohazard occurrence is usually affected by many factors,among which active nature of the seismogenic fault,seismic peak ground acceleration(PGA),topographic slope and geomorphic height differences,and distance from the fault zone and river system are the most *** with strike-slip earthquakes,thrust earthquakes induce more high-altitude and high-speed remote landslides,which can cause great *** of 0°–40°are prone to secondary seismic geohazards,which are mainly concentrated 0–6 km from the river *** geohazards are not only related to seismogenic fault but also influenced by the associated faults in the earthquake *** maximum seismic PGA and secondary seismic geohazard number are positively correlated,and the horizontal and vertical ground motions play leading and promoting roles in secondary geohazard formation,*** the research,the spatial distribution of seismic geohazards is predicted,providing a basis for the formulation of emergency response plans following disasters.

关键词： Wenchuan earthquake geohazards Main control factors Comparative study Geological disater survey engineering Western China

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Deep-Sea geohazards in the South China Sea

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Journal of Ocean University of China 2018年第1期17卷 1-7页

作者： WU Shiguo WANG Dawei VOKER David Laboratory of Marine Geophysics and Georeource Institute of Deep-Sea Science and EngineeringChinese Academy of SciencesSanya 572000China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266061China College of Earth Sciences University of Chinese Academy of SciencesBeijing 100049China MARUM Center for Marine Environmental Sciences University of BremenBremen 28359Germany

Various geological processes and features that might inflict hazards identified in the South China Sea by using new technologies and *** features include submarine landslides,pockmark fields,shallow free gas,gas hydrates,mud diapirs and earthquake tsunami,which are widely distributed in the continental slope and reefal islands of the South China *** the study and assessment of geohazards in the South China Sea came into operation only recently,advances in various aspects are evolving at full speed to comply with National Marine Strategy and‘the Belt and Road’*** characteristics of geohazards in deep-water seafloor of the South China Sea are summarized based on new scientific *** progress is aimed to aid ongoing deep-water drilling activities and decrease geological risks in ocean development.

关键词： deep-sea geohazards South China Sea

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Distribution Characteristics of geohazards Induced by the Lushan Earthquake and Their Comparisons with the Wenchuan Earthquake

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Journal of Earth Science 2014年第5期25卷 912-923页

作者： Zhiqiang Yin Wuji Zhao Xiaoguang Qin Institute of Geology and Geophysics Chinese Academy of Sciences China Institute of Geo-Environment Monitoring School of Earth Sciences and Resources China University of Geosciences

The Lushan Earthquake induced a large number of geohazards. They are widely distributed and caused serious damages. The basic characteristics, formation mechanisms and typical cases of geohazards induced by Lushan Earthquake are described, and compares to the relationships of Lushan and Wenchuan earthquakes between geohazards and earthquake magnitude, geomorphology, slope angle, elevation and seismic intensity in the most affected areas in the article.（1） The numbers and volumes of landslides and rockslides differ significantly between the two earthquakes due to their differing magnitudes. The Lushan Earthquake is associated with fewer and smaller-magnitude geohazards, within the immediate area, which mainly consist of small-and medium-sized shallow landslides and rockslides, and occur on steep slopes and mountain valleys. The largest landslide induced by Lushan Earthquake is the Gangoutou Landslide debris flow with a residual volume of about 2.48×106 m3. The most dangerous debris flow is at Lengmugou gulley in Baoxing County, which has similar geomorphological features and disaster modes as a previous disaster in Zhouqu County, Gansu Province.（2） geohazards induced by the Lushan Earthquake show four mechanisms： cracking-rockslides-collision- scraping and then debris flows, cracking-rockslides, vibration-rainfall-rockslides-landslide and then debris flow, vibration-throwing or scrolling.（3） There are significant similarities and differences between the geohazards induced by these two earthquakes. The types of geohazards are the same but the volume, quantity and other factors differ： geohazards are concentrated on slope angles of 10°-40° in the Lushan Earthquake area, especially within 10°-20°, and at absolute elevation of 500-2000 m above sea level（a.s.l.）. geohazards within the Wenchuan Earthquake area are concentrated on steeper slope angles of 30°-40° at higher absolute elevations of 1500-2000 m.s.l..

关键词： Lushan Earthquake Wenchuan Earthquake geohazards basic characteristics comparison.

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Quantitative assessment of the impact of earthquakeinduced geohazards on natural landscapes in Jiuzhaigou Valley

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Journal of Mountain Science 2019年第2期16卷 441-452页

作者： HU Xu-dong HU Kai-heng ZHANG Xiao-peng WEI Li TANG Jin-bo Key Laboratory of Mountain Hazards and Earth Surface Processes Chinese Academy of Sciences Institute of Mountain Hazards and Environment Chinese Academy of Sciences University of Chinese Academy of Sciences

Many natural landscapes that lie in high mountain regions are highly susceptible to geological hazards, and their values and integrity are strongly threatened by the hazards. A preliminary framework was proposed to undertake a quantitative assessment of the impact of earthquake-induced geological hazards on the natural landscapes. Four factors reflecting the aesthetic value, ecological value, integrity of landscapes were selected to assess their vulnerability. The impact of earthquake-induced geological hazards on the landscapes is quantitatively expressed as the product of their vulnerability and resilience. The assessment framework was applied to Jiuzhaigou Valley which was severely struck by the Ms 7.0 earthquake on August 8, 2017. Field survey, satellite image interpretation, high-resolution DEM and unmanned aerial vehicle(UAV) reconnaissance were used to retrieve the values of the assessment factors. Twenty seven World Heritage Sites in the valley strongly influenced by the earthquakeinduced geohazards were evaluated. The impact values of two sites of them(Sparking Lake and Nuorilang Waterfall) are up to 8.24 and 4.65, respectively, and their natural landscapes were greatly damaged. The assessment results show a good agreement with the actual damages of the heritage sites.

关键词： Natural landscapes assessment Jiuzhaigou earthquake Earthquake-induced geohazards World Heritage Sites

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Land Surface Displacement geohazards Monitoring Using Multi-temporal InSAR Techniques

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Journal of Geodesy and Geoinformation Science 2021年第1期4卷 77-87页

作者： Guang LIU Perski ZBIGNIEW Salvi STEFANO Thiebes BENNI Lixin WU Jinghui FAN Shibiao BAI Lianhuan WEI Shiyong YAN Rui SONG Bignami CHRISTIAN Tolomei CRISTIANO Stefan SCHNEIDERBAUER Joao Sousa JOAQUIM 无 Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijing 100094China Carpathian Branch Polish Geological Institute-National Research InstituteCracow 31-560Poland National Institute of Geophysics and Volcanology Roma 605-00143Italy German Committee for Disaster Reduction Bonn 1353113Germany School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China Division of Remote Sensing for Environment China Aero Geophysical Survey&Remote Sensing Center for Natural ResourcesBeijing 100083China School of Marine Science and Ocean Engineering Nanjing Normal UniversityNanjing 210046China School of Environment Science and Spatial Informatics China University of Mining and TechnologyXuzhou 221116China Mullard Space Science Laboratory Department of Space and Climate Physics University College London Holmbury RH56NTUK Eurac Research Bolzano 39100Italy School of Science and Technology University of Trás-os-Montes e Alto DouroVila Real 5000-801Portugal Centre for Robotics in Industry and Intelligent Systems(CRIIS) INESC Technology and Science(INESC-TEC)Porto 4200-465Portugal

China has been affected by some of the world’s most serious geological disasters and experiences high economic damage every *** occur not only in remote areas but also in highly populated *** the framework of the Dragon-432365 Project,this paper presents the main results and the major conclusions derived from an extensive exploitation of Sentinel-1,ALOS-2(Advanced Land Observing Satellite 2),GF-3(Gao Fen Satellite 3),and latest launched SAR(Synthetic Aperture Radar),together with methods that allow the evaluation of their importance for various ***,in the scope of this project,the great benefits of recent remote sensing data(wide spatial and temporal coverage)that allow a detailed reconstruction of past displacement events and to monitor currently occurring phenomena are exploited to study different areas and geohazards problems,including:surface deformation of mountain slopes;identification and monitoring of ground movements and subsidence;landslides;ground fissure;and building inclination *** movements detected in the different study areas were cross validated with different SAR sensors and truth data.

关键词： Dragon-4 project Sentinel-1 GF-3 landslide geohazards InSAR

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geohazards in Pamir Mountains,Tajikistan

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地学前缘 2009年第S1期16卷 281-281页

作者： Muso Nusayriev Rahmat Karamkhudoev Sangin Elnazarov Tawfiq Mirzoev Robia Sukhrobshoeva Khushnood Nazarshoev Aini st.2 Khorog cityGBAOPamirsTajikistan

We want to talk about the geohazards in Pamir mountains,in Tajikistan,using different materials and researches about *** we are trying to look deeply into this problem,and want to research how about

关键词： geohazards Pamirs Tajikistan Central Asia

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geohazards and Risk in Developing Nations

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地学前缘 2009年第S1期16卷 61-61页

作者： Gregory De Pascale Fugro William Lettis and Associates Inc

geohazards,such as earthquakes,landslides, tsunamis,volcanic eruptions,floods,melting permafrost, and metastable soils impact people’s lives *** growth is forcing people to live in areas that have classically supported low population densities including steep slopes,low-lying coasts,and along floodplains and currently climate change is exacerbating risk in these regions.

关键词： geohazards risk landslides earthquakes tsunamis soils permafrost mitigation volcanos

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Application of GIS-Based Mathematical Models into Regional Assessment of geohazards in Three Gorges Reservoir Area

Application of GIS-Based Mathematical Models into Regional A...

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智能计算及其应用国际会议

作者： LUO Wenqiang1 HUANG Runqiu2 (1 Department of Mathematics and Physics China University of Geosciences Wuhan 430074 China) (2 Institute of Geology Engineering Chengdu University of Technology Chengdu 610059 China)

We presented application of GIS-based artificial neural network model, information theory model and fuzzy sets model into regional assessment of geohazards in Three Gorges Reservoir area. Using GIS fu

关键词： GIS mathematical models Three Gorges Reservoir area geohazards

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