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Identification and hazard analysis of landslides triggered by earthquakes and rainfall

Earthquake Research Advances 2024年第3期4卷 42-54页

作者： Lei Li Yu Zhang Yunlong Hou Bingbing Han Ning An Hui Zhang Ying Ma School of Traffic and Transportation Lanzhou Jiaotong UniversityLanzhou730070China Key Laboratory of Railway Industry on Plateau Railway Transportation Intelligent Management and Control Lanzhou Jiaotong UniversityLanzhou730070China Gansu Institute of Engineering Geology Lanzhou730030China School of Civil Engineering Lanzhou Jiaotong UniversityLanzhou730070China

This study aims to utilize the Small Baseline Subset Interferometric Synthetic Aperture Radar(SBAS-In SAR)technique and Google Earth optical remote sensing images to analyze the area within 20 km around the epicenter of a M 3.9, earthquake that occurred in Tanchang County, Gansu Province, on December 28, 2020. The objective is to identify potential earthquake-induced landslides, assess their scale, and determine their impact range. The study results reveal the successful identification of two potential landslides in the 20 km radius around the epicenter. Through time-series deformation analysis, it was observed that these potential landslides were significantly influenced by both the earthquake and rainfall. Further estimation of these potential landslides indicates maximum depths of 7.4 m and 14.1 m for the failure surfaces, with volumes of 9.02 × 10~4m~3and 25.5 ×10~4m~3, respectively. Finally, based on the simulation analysis of Massflow software, the maximum thickness of soil accumulation in the final accumulation area after sliding of the potential landslide in Shangyaai is 12 m, the area of the final accumulation area is 1.75 × 10~4m~2, and the farthest movement distance is 1124 m. The maximum thickness of soil accumulation in the final accumulation area after sliding of the potential landslide in Wangshancun is 8 m, the area of the final accumulation area is 7.89 × 10~4m~2, and the farthest movement distance is 742 m.

关键词： SBAS-InSAR technology Earthquake Deformation monitoring Landslide Massflow hazard analysis

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hazard analysis system of urban post-earthquake fire based on GIS

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Earthquake Science 2001年第4期14卷 448-455+484页

作者：李杰江建华李明浩 Department of Building Engineering Tongji University Shanghai China

The authors study the structure, functions and data organization for the hazard analysis system of urban post-earthquake fire on the platform of GIS. A general hazard analysis model of the post-earthquake fire is presented. Taking Shanghai central district as background, a system for hazard analysis of the post-earthquake fire and auxiliary decision-against fire is developed.

关键词： geographic information system (GIS) post-earthquake fire hazard analysis

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hazard analysis on One-Room Building Fires

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Journal of Thermal Science 1998年第4期7卷 272-277页

作者： YuDeming FengChanggen CivilandArchitectureCollege ChangshaRailwayUniversityHunanCHina410075 MechanicsandEnginerringDept.

First, a calculation method for available safety egress time (shortly called ASET) and requirement safety egress time (shortly called RSET) in a one-room building fire is proposed and a model for predicting the death number caused by the fire is established in this paper. Then, numerical simulations are performed, and the following laws are discovered: (1) At the beginning of the fire, the smoke layer falls slowly; as the fire develops, it falls rapidly. (2) The hypotheses on the fire source, the combustion properties of the combustibles, and the width of the exit and the person number in the room are important factors which affect the death number in the fire.

关键词： one-room fires hazard analysis numerical simulations ASET calculation RSET calculation

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Multi-scenario-based hazard analysis of high temperature extremes experienced in China during 1951-2010

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Journal of Geographical Sciences 2013年第3期23卷 436-446页

作者： YIN Zhan'e YIN Jie ZHANG Xiaowei Department of Geography Shanghai Normal University Shanghai 200234 China Key Laboratory of Geographic Information Science Ministry of Education East China Normal UniversityShanghai 200062 China School of Tourism and City Management Zhejiang Gongshang University Hangzhou 310018 China

China is physically and socio-economically susceptible to global warming-derived high temperature extremes because of its vast area and high urban population density. This article presents a scenario-based analysis method for high temperature extremes aimed at illustrating the latter＇s hazardous potential and exposure across China. Based on probability analysis, high temperature extreme scenarios with return periods of 5, 10, 20, and 50 years were designed, with a high temperature hazard index calculated by integrating two differen- tially-weighted extreme temperature indices （maximum temperature and high temperature days）. To perform the exposure analysis, a land use map was employed to determine the spatial distribution of susceptible human activities under the different scenarios. The results indicate that there are two heat-prone regions and a sub-hotspot occupying a relatively small land area. However, the societal and economic consequences of such an environmental im- pact upon the North China Plain and middle/lower Yangtze River Basin would be substantial due to the concentration of human activities in these areas.

关键词： hazard analysis high temperature extremes scenario exposure China

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PGA and structural dynamics input motion at a given site

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Earthquake Engineering and Engineering Vibration 2003年第1期2卷 25-34页

作者： Fabio Casciati Sara Casciati Alberto Marcellini Dept.of Structural Mechanics University of Pavia27100 PaviaItaly Professor Dept.of Structural Mechanics University of Pavia27100 PaviaItaly Ph.D.Student CNR-IDPA 20133 MilanoItaly Research Director

The computation of the representative ground motions,to be used as input for the dynamic analyses of a struc- ture at a particular site,can be approached by several *** choice of the approach depends on two factors:the da- ta available and the type of problem to be *** paper reports the experience of the authors in approaching a specific case study:the Southern Memnon Colossus,located in Luxor,*** results are of interest when the hazard analysis estimation in developing countries and the safeguard of cultural heritage are *** have to be treated as important structures,due to their historical and economical ***,standard procedures of probabilistic seismic haz- ard analysis for the seismic classification of common buildings have to be *** the other hand,the consequences of the collapse of a monument are not comparable to those related to structures such as nuclear power plants and large dams, for which the deterministic seismic hazard analysis provides a straightforward framework for evaluation of the worst case ground ***'intermediate'approach,which requites a lower amount of input data with respect to the deterministic one,is *** stochastic component can eapture significant eharacteristics of earthquakes,primarily the frequency contents which depend on the magnitude(often referred to as the earthquake scaling law).

关键词： accelerograms hazard analysis site effects structural dynamics

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Integrating image processing and deep learning for effective analysis and classification of dust pollution in mining processes

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International Journal of Coal Science & Technology 2023年第4期10卷 17-33页

作者： JiangJiang Yin Jiangyang Lei Kaixin Fan Shaofeng Wang School of Resources and Safety Engineering Central South UniversityChangsha 410083HunanChina

A comprehensive evaluation method is proposed to analyze dust pollution generated in the production process of *** method employs an optimized image-processing and deep learning framework to characterize the gray and fractal features in dust *** research reveals both linear and logarithmic correlations between the gray features,fractal dimension,and dust mass,while employing Chauvenel criteria and arithmetic averaging to minimize data *** integrated hazardous index is developed,including a logarithmic correlation between the index and dust mass,and a four-category dataset is subsequently prepared for the deep learning *** on the range of the hazardous index,the dust images are divided into four ***,a dust risk classifcation system is established using the deep learning model,which exhibits a high degree of performance after the training ***,the model achieves a testing accuracy of 95.3%,indicating its efectiveness in classifying diferent levels of dust pollution,and the precision,recall,and F1-score of the system confrm its reliability in analyzing dust ***,the proposed method provides a reliable and efcient way to monitor and analyze dust pollution in mines.

关键词： Dust pollution hazard analysis Grayscale average Fractal dimension Deep learning

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GIS applications in typhoon simulation and hazard assessment

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Journal of Harbin Institute of Technology(New Series) 2005年第4期12卷 383-387页

作者：常亮段忠东欧进萍 School of Civil Engineering Harbin Institute of Technology Harbin 150090 China

GIS technology provides a powenful tool for disaster hazard assessment and mitigation. A GIS based system is developed for typhoon data management and analysis, typhoon simulation and hazard assessment for southeast coast of China in this paper. A typhoon database by Microsoft Access is designed. Data manipulation and analysis, typhoon simulation and hazard assessment, and visualization of results are implemented on GIS platform. This GIS-based typhoon database and analysis system greatly facilitates typhoon hazard assessment.

关键词： GIS typhoon hazard analysis disaster mitigation

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hazard Mitigation through a Systemic Model of Accident to a Socio-Technical System： A Case Study

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Journal of Energy and Power Engineering 2013年第4期7卷 775-787页

作者： Karim Hardy Franck Guarnieri Aeronautics Department Worldwide Campus Embry-Riddle Aeronautical University Daytona Beach FL 32114 USA Center for Research on Risk and Crisis Mines ParisTech Sophia-Antipolis 06904 France

This paper presents the STAMP （system-theoretic accident modeling and processes） accident model, based on systems theory, and describes its application in the context of risk prevention related to the remediation of contaminated sediments. The implementation of the model is described, and results are presented both in methodological and technical terms. The goal of this article is to emphasize the need of new approaches to take into account hazards and accidents within socio-technical systems.

关键词： hazard analysis hazards engineering accident analysis contaminated sediments STAMP systems theory models.

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