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Author: Luc Empereur-Mot
Publisher:
ISBN:
Category :
Languages : fr
Pages : 187
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Book Description
Author: Luc Empereur-Mot
Publisher:
ISBN:
Category :
Languages : fr
Pages : 187
Get Book Here
Book Description
Author: Luc Empereur-Mot
Publisher:
ISBN:
Category :
Languages : fr
Pages : 187
Get Book Here
Book Description
Author: Luc Empereur-Mot
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Book Description
La connaissance du milieu fracturé tridimensionnel est basée sur l'observation directe ou indirecte d'extraits, en une ou deux dimensions. Les difficultés de visualisation en 3 dimensions et l'existence constante de nombreuses lacunes géométriques sont un handicap majeur pour la compréhension des lois de comportement complexes du milieu rocheux fracturé. Des modèles numériques dits "équivalents" répondent isolément à une problématique particulière du réseau de fractures (mécanique, hydraulique, thermique). Pourtant, un grand nombre de propriétés physiques du massif rocheux sont conditionnées par la géométrie et la topologie du système de fractures, qui reste une question d'ordre fondamental. C'est un aspect essentiel que nous traitons dans notre modèle OBSIFRAC (modèle objet pour la simulation de la fracturation). L'observation de sections naturelles justifie que l'on représente, dans un milieu soumis à la seule déformation cassante, les discontinuités par des surfaces planes, interconnectées, sans terminaisons libres, limitant des polyèdres convexes. Dés lors, le réseau de fractures peut être vu comme un assemblage de blocs. Cette hypothèse nous a permis de construire une base de données tridimensionnelles du réseau, décrivant de façon exhaustive les constituants géométriques de l'assemblage en question (fractures, blocs, faces, arêtes et noeuds). A partir d'un "germe" ponctuel, le processus de fragmentation affecte un ou plusieurs bloc(s) formé(ś) éventuellement de plusieurs polyèdres élémentaires. L'orientation et la position des plans de fractures peuvent ^etre définies de façon stochastique, statistique ou déterministe. Nous avons développé 4 moteurs de fragmentation, notés A, B, C, et D, qui diffèrent par le protocole de choix du germe d'une part, et par le choix du ou des blocs à diviser d'autre part. Nous présentons pour chaque scénario, une caractérisation descriptive, puis statistique.
Author: Jean Hector
Publisher:
ISBN:
Category :
Languages : fr
Pages : 94
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Author: M. Albu
Publisher: Springer Science & Business Media
ISBN: 9401158460
Category : Science
Languages : en
Pages : 460
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Book Description
Is it not generally believed that our town is a healthy place . . . a place highly com mended on this score both for the sick andfor the healthy? . . And then these Baths - the so-called 'artery' of the town, or the 'nerve centre' . . . Do you know what they are in reality, these great and splendid and glorious Baths that have cost so much money? . . A most serious danger to health! All that filth up in Melledal, where there's such an awful stench - it's all seeping into the pipes that lead to the pump-room! Henrik Ibsen, An Enemy of the People, 1882 Henrik Ibsen gave the 'truth about mineral water' more than 100 years ago in An Enemy of the People. His examples came not from the decadent bathing spas of Bohemia or Victorian Britain, but from the very edge of polite society, subarctic Norway! His masterpiece illustrates the central role that groundwaters and, in particular, mineral waters have played in the history of humanity: their economic importance for towns, their magnetism for pilgrims searching for cures, the political intrigues, the arguments over purported beneficent or maleficent health effects and, finally, their contami nation by anthropogenic activity, in Ibsen's case by wastes from a tannery. This book addresses the occurrence, properties and uses of mineral and thermal groundwaters. The use of these resources for heating, personal hygiene, curative and recreational purposes is deeply integrated in the history of civilization.
Author: Attila Çiner
Publisher: Springer Nature
ISBN: 3030725472
Category : Science
Languages : en
Pages : 373
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This edited book is based on the papers accepted for presentation during the 2nd Springer Conference of the Arabian Journal of Geosciences (CAJG-2), Tunisia, in 2019. Major subjects treated in the book include geomorphology, sedimentology, and geochemistry. The book presents an updated unique view in conjugating field studies and modeling to better quantify the process-product binomial unusual in geosciences. In the geomorphology section, 24 papers deal with topics related to fault slip and incision rates, soil science, landslides and debris flows, coastal processes, and geoarcheology, and geoheritage. Under the sedimentology section, 34 papers including stratigraphy, and environmental, tectonic, and diagenetic processes, together with evolutionary, biostratigraphic, and paleo-environmental significance of paleontology are presented. Additionally, this section also contains papers on marine geosciences, from molecular proxies related to climate to geophysical surveys. Last but not least, the third section on geochemistry is composed of 26 papers that are focused on sedimentary geochemistry and mineralogical characterization, magmatic and metamorphic processes and products, and the origin and exploration of mineral deposits. This book resumes the current situation related to the abovementioned topics mainly in the Mediterranean realm. The volume book is of interest to all researchers, practitioners, and students in the fields of geomorphology, sedimentology, and geochemistry, as well as those engaged in environmental geosciences, soil science, stratigraphy and paleontology, geoarcheology and geoheritage, marine geosciences, petrology, metallogenesis, and mineral deposits.
Author: Lee W. Abramson
Publisher: John Wiley & Sons
ISBN: 9780471384939
Category : Technology & Engineering
Languages : en
Pages : 738
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Book Description
A major revision of the comprehensive text/reference Written by world-leading geotechnical engineers who share almost 100 years of combined experience, Slope Stability and Stabilization, Second Edition assembles the background information, theory, analytical methods, design and construction approaches, and practical examples necessary to carry out a complete slope stability project. Retaining the best features of the previous edition, this new book has been completely updated to address the latest trends and methodology in the field. Features include: All-new chapters on shallow failures and stability of landfill slopes New material on probabilistic stability analysis, cost analysis of stabilization alternatives, and state-of-the-art techniques in time-domain reflectometry to help engineers plan and model new designs Tested and FHA-approved procedures for the geotechnical stage of highway, tunnel, and bridge projects Sound guidance for geotechnical stage design and planning for virtually all types of construction projects Slope Stability and Stabilization, Second Edition is filled with current and comprehensive information, making it one of the best resources available on the subject-and an essential reference for today's and tomorrow's professionals in geology, geotechnical engineering, soil science, and landscape architecture.
Author: Walter Bonatti
Publisher:
ISBN:
Category : Alps
Languages : en
Pages : 272
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Author: Andrew S. Goudie
Publisher: Cambridge University Press
ISBN: 1316785262
Category : Science
Languages : en
Pages : 335
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The Anthropocene is a major new concept in the Earth sciences and this book examines the effects on geomorphology within this period. Drawing examples from many different global environments, this comprehensive volume demonstrates that human impact on landforms and land-forming processes is profound, due to various driving forces, including: use of fire; extinction of fauna; development of agriculture, urbanisation, and globalisation; and new methods of harnessing energy. The book explores the ways in which future climate change due to anthropogenic causes may further magnify effects on geomorphology, with respect to future hazards such as floods and landslides, the state of the cryosphere, and sea level. The book concludes with a consideration of the ways in which landforms are now being managed and protected. Covering all major aspects of geomorphology, this book is ideal for undergraduate and graduate students studying geomorphology, environmental science and physical geography, and for all researchers of geomorphology.
Author: Nasser Ennih
Publisher: Geological Society of London
ISBN: 9781862392519
Category : Science
Languages : en
Pages : 552
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Book Description
