[PDF] Computational Modelling Of Debris Flows And Their Interaction With Resisting Barriers Based On A Coupled Cfd Dem Approach eBook

Author : D. De Wrachien
Publisher : WIT Press
Page : 241 pages
File Size : 17,76 MB
Release : 2008
Category : Science
ISBN : 1845641183

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This book contains papers presented at Second International Conference on Debris Flow including all aspects of Debris Flow Monitoring, Modelling, Hazard Assessment, Mitigation Measures, Case Studies and Extreme Events, Erosion, Slope Instability and Sediment Transport, held in the New Forest, UK in 2008 and organised by the Wessex Institute of Technology, with the co-sponsorship of EurAgEng (European Society of Agricultural Engineers) and CIGR (International Commission of Agricultural Engineering). Due to the increased frequency with which debris and hyper-concentrated flows occur and the impact they have on both the environment and human life, in recent years these extreme events and related processes have attracted increasing attention from research groups, land planning and management professionals The objective of the Meeting was to provide a forum for engineers, scientists and managers from laboratories, industry, government and academia to interchange knowledge and expertise in the field of dense and hyper-concentrated flows. A full understanding of these phenomena leads to a new integrated risk management approach which provides measures for preventing a hazard turning into a natural disaster.

Author : Bisheng Wu
Publisher : Frontiers Media SA
Page : 162 pages
File Size : 38,16 MB
Release : 2024-01-29
Category : Science
ISBN : 2832543596

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Since the beginning of the 21st century, global environmental problems have become increasingly prominent, and extreme weather events have become more frequent. The irrational development and excessive construction of underground space have also led to various disasters, such as landslides, collapses, debris flows, and ground collapses. According to the data released in the National Geological Disaster Bulletin, 133899 geological disasters have occurred in China from 2009 to 2019, of which landslides accounted for 71%, collapses for 19%, and debris flows for 8%, and ground collapses for 2%. The number of casualties and economic losses caused by rock and soil disasters are the greatest in the world. Therefore, a good understanding of disaster-causing mechanisms of rock and soil has a strong theoretical and practical significance for the safe construction of diversified geotechnical projects.

Author : Tamotsu Takahashi
Publisher : Taylor & Francis
Page : 465 pages
File Size : 45,90 MB
Release : 2007-05-03
Category : Technology & Engineering
ISBN : 1134077882

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Comprehensive account, treating both theoretical and applied aspects of debris flow. The text begins with a discussion of fundamental mechanical aspects, such as flow characteristics, type classification, mechanics, occurrence and development, fully-developed flow and deposition processes. The second part of the book sheds light on the application of theory in relation to computer-simulated reproductions of real disasters. Attention is paid to debris flow controlling structures, design effectiveness and performance, soft countermeasure problems, such as identification of debris flow prone ravines and the prediction of occurrence by the concept of precipitation threshold. The qualitative and fundamental character of this book makes it an excellent textbook for graduate courses in debris flow and it is recommended reading for professionals in engineering, geosciences and water resources who are concerned with mechanics and countermeasures of debris flow. Keywords: stony debris flow, viscous debris flo, landslide induced debris flow, hazard zone mapping, grid type sabo dam.

Author : Tamotsu Takahashi
Publisher : CRC Press
Page : 574 pages
File Size : 33,25 MB
Release : 2014-03-10
Category : Technology & Engineering
ISBN : 1138000078

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This is the 2nd edition of one of the most comprehensive accounts of debris flow, describing both theoretical and applied aspects. In the first part, the fundamental mechanical characteristics are discussed, including flow characteristics, type classification, mechanics, occurrence and development, fully developed flow, and deposition processes. The second part sheds light on the application of the theories presented in computer-simulated reproductions of real disasters. Special attention is paid to debris flow controlling structures, design effectiveness and performance, soft countermeasure problems, such as the identification of debris flow prone ravines and the prediction of occurrence by means of precipitation threshold. This new edition has been wholly revised and updated, and now includes a new chapter on sediment runoff models that include debris flow processes and new sections concerning landslides. The qualitative and fundamental character of this text makes it an excellent textbook for graduate-level courses and it is recommended reading for professionals in engineering, geosciences and water resources who are working on the mechanics and countermeasures of debris flow. The original, Japanese version of this book was awarded the ‘Publishing Culture Prize’ by the Japanese Society of Civil Engineers (2004). Tamotsu Takahashi is Professor Emeritus at the University of Kyoto. In addition to his academic positions, he is the Director of the Association for Disaster Prevention Research in Kyoto. Professor Takahashi began his career in flood dynamics research, and increasingly focused on debris flow and flood hazards. He has been honoured with several awards from the Japan Society of Civil Engineers and the Japan Society of Erosion Control Engineering. An earlier book entitled ‘Debris Flow’, by Tamotsu Takahashi, in the book series of the International Association of Hydraulic Engineering and Research, was published by Balkema Publishers, now a part of the Taylor & Francis Group.

Author : Catherine O'Sullivan
Publisher : CRC Press
Page : 574 pages
File Size : 40,32 MB
Release : 2011-04-06
Category : Technology & Engineering
ISBN : 1482266490

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The first single work on DEM providing the information to get started with this powerful numerical modelling approach. Provides the basic details of the numerical method and the approaches used to interpret the results of DEM simulations. It will be of use to professionals, researchers and higher level students, with a theoretical overview of DEM as well as practical guidance.Selected Contents: 1.Introduction 2.Use of DEM in Geomechanics 3.Calculation of Contact Forces 4.Particle Motion 5.Particle Types 6.Boundary Conditions 7.Initial Geometry and Specimen Generation 8.Time Integration and Discrete Element Modelling 9.DEM Interpretation: A Continuum Perspective 10.Postprocessing: Graphical Interpretation of DEM Simulations 11.Basic Statisti

Author : Tao Zhao
Publisher : Springer
Page : 230 pages
File Size : 21,84 MB
Release : 2017-05-22
Category : Science
ISBN : 9811046271

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This book reflects the latest research results in computer modelling of landslide-induced debris flows. The book establishes an understanding of the initiation and propagation mechanisms of landslides by means of numerical simulations, so that mitigation strategies to reduce the long-term losses from landslide hazards can be devised. In this context, the book employs the Discrete Element Method (DEM) and Computational Fluid Dynamics (CFD) to investigate the mechanical and hydraulic behaviour of granular materials involved in landslides – an approach that yields meaningful insights into the flow mechanisms, concerning e.g. the mobilization of sediments, the generation and dissipation of excess pore water pressures, and the evolution of effective stresses. As such, the book provides valuable information, useful methods and robust numerical tools that can be successfully applied in the field of debris flow research.

Author : D. De Wrachien
Publisher : WIT Press
Page : 290 pages
File Size : 30,14 MB
Release : 2010
Category : Science
ISBN : 1845644425

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Debris and hyper-concentrated flows are among the most destructive of all water related disasters. They affect both rural and urban areas in a wide range of morphoclimatic environments, and in recent years have attracted more and more attention from the scientific and professional communities and concern from the public due to the death toll they claim. The increased frequency of these natural hazards, coupled with climatic change predictions and urban development, suggests that they are set to worsen in the future. This book contains the edited versions of the papers presented at the third International conference on Monitoring, Simulation, Prevention and Remediation of Dense and Debris Flows. The Conference brought together engineers, scientists and managers from across the globe to discuss the latest scientific advancs in the field of dense and hyper-concentrated flows, as well as to improve models, assess risk, develop hazard maps based on model results and to design prevention and mitigation measures. The papers have been organised into the following sections: Debris Flow Modelling; Debris Flow Triggering; Risk Assessment and Hazard Mitigation; Sediment Transport and Debris Flow Monitoring & Analysis.