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Author: François Bourrin Publisher: ISBN: Category : Languages : en Pages : 305
Book Description
The Gulf of Lions is a continental margin with deltaic construction subjected to the impact of the sedimentary contributions (1) of the Rhone, one of the largest Mediterranean rivers, with seasonal hydrological cycle; (2) as well as series of torrential coastal rivers. Temporary deposit areas of the fine-grained sediment develop directly front of these rivers around 30 m water depth corresponding to the storm wave base. The dynamic of these zones subjected to the impact of the extreme events plays an important role in (1) the dissemination of the fine sediments and the associated contaminants from sources (catchment) to the sea, and (2) the water quality of the littoral zone. An automatic high frequency and long-term monitoring station was installed on the Têt River, example of mediterranean torrential coastal rivers and on its prodelta in order to estimate the variability, the impact of the hydro-climatic events on the behaviour of fine sediments in the littoral zone. Flash-floods generated by marine winds are the principal sources of fine sediments at the littoral zone. Storms associated to floods create redistribution of this material towards the circa-littoral mud belt around 50 m of water depth and the shelf edge where are located the underwater canyons. The succession of these extreme events during the year determines the preservation of the fine material in the littoral zone or its export towards the shelf. A strong interannual variability also exists in the Gulf of Lions between wet years with strong floods and storms supplying and redistributing great quantities of sedimentary material on the shelf and, dry years characterized by intense currents originating from dense water cascading descending and eroding the shelf to the underwater canyons. The extreme hydro-climatic events (flash-floods, storms, dense water cascading) are the principal actors who shape the bottom sediments of the Gulf of Lions. The impact of the human activities and climatic change plays an important role on the frequency of these extreme events and on the variability of littoral water quality and the fine-grained sediments and contaminants dispersal.
Author: François Bourrin Publisher: ISBN: Category : Languages : en Pages : 305
Book Description
The Gulf of Lions is a continental margin with deltaic construction subjected to the impact of the sedimentary contributions (1) of the Rhone, one of the largest Mediterranean rivers, with seasonal hydrological cycle; (2) as well as series of torrential coastal rivers. Temporary deposit areas of the fine-grained sediment develop directly front of these rivers around 30 m water depth corresponding to the storm wave base. The dynamic of these zones subjected to the impact of the extreme events plays an important role in (1) the dissemination of the fine sediments and the associated contaminants from sources (catchment) to the sea, and (2) the water quality of the littoral zone. An automatic high frequency and long-term monitoring station was installed on the Têt River, example of mediterranean torrential coastal rivers and on its prodelta in order to estimate the variability, the impact of the hydro-climatic events on the behaviour of fine sediments in the littoral zone. Flash-floods generated by marine winds are the principal sources of fine sediments at the littoral zone. Storms associated to floods create redistribution of this material towards the circa-littoral mud belt around 50 m of water depth and the shelf edge where are located the underwater canyons. The succession of these extreme events during the year determines the preservation of the fine material in the littoral zone or its export towards the shelf. A strong interannual variability also exists in the Gulf of Lions between wet years with strong floods and storms supplying and redistributing great quantities of sedimentary material on the shelf and, dry years characterized by intense currents originating from dense water cascading descending and eroding the shelf to the underwater canyons. The extreme hydro-climatic events (flash-floods, storms, dense water cascading) are the principal actors who shape the bottom sediments of the Gulf of Lions. The impact of the human activities and climatic change plays an important role on the frequency of these extreme events and on the variability of littoral water quality and the fine-grained sediments and contaminants dispersal.
Author: Collectif Publisher: IRD Éditions ISBN: 2709922207 Category : Nature Languages : en Pages : 736
Book Description
This book has been published by Allenvi (French National Alliance for Environmental Research) to coincide with the 22nd Conference of Parties to the United Nations Framework Convention on Climate Change (COP22) in Marrakesh. It is the outcome of work by academic researchers on both sides of the Mediterranean and provides a remarkable scientific review of the mechanisms of climate change and its impacts on the environment, the economy, health and Mediterranean societies. It will also be valuable in developing responses that draw on “scientific evidence” to address the issues of adaptation, resource conservation, solutions and risk prevention. Reflecting the full complexity of the Mediterranean environment, the book is a major scientific contribution to the climate issue, where various scientific considerations converge to break down the boundaries between disciplines.
Author: Rob Young Publisher: Geological Society of America ISBN: 0813760321 Category : Science Languages : en Pages : 316
Book Description
"Geologic Monitoring is a practical, nontechnical guide for land managers, educators, and the public that synthesizes representative methods for monitoring short-term and long-term change in geologic features and landscapes. A prestigious group of subject-matter experts has carefully selected methods for monitoring sand dunes, caves and karst, rivers, geothermal features, glaciers, nearshore marine features, beaches and marshes, paleontological resources, permafrost, seismic activity, slope movements, and volcanic features and processes. Each chapter has an overview of the resource; summarizes features that could be monitored; describes methods for monitoring each feature ranging from low-cost, low-technology methods (that could be used for school groups) to higher cost, detailed monitoring methods requiring a high level of expertise; and presents one or more targeted case studies."--Publisher's description.
Author: Jacqueline Ki-Zerbo Publisher: Univ of California Press ISBN: 9780520066960 Category : History Languages : en Pages : 372
Book Description
"This volume covers the period from the end of the Neolithic era to the beginning of the seventh century of our era. This lengthy period includes the civilization of Ancient Egypt, the history of Nubia, Ethiopia, North Africa and the Sahara, as well as of the other regions of the continent and its islands."--Publisher's description
Author: Jay Stratton Noller Publisher: American Geophysical Union ISBN: Category : Science Languages : en Pages : 606
Book Description
Forty-four contributions survey the established and experimental means of dating Quaternary Period surficial materials. The basic theory, procedures, and accuracy are reviewed for sidereal, isotopic, radiogenic, chemical and biological, geomorphological, and correlation methods. A series of case studies then illustrates the application of geochronology in Quaternary geology and the emerging field of paleoseismology. The volume is a minor revision and update of a portion of a 1998 report to the U.S. Nuclear Regulatory Commission. Member price, $56. Annotation copyrighted by Book News, Inc., Portland, OR.
Author: H.J. Morel-Seytoux Publisher: Springer Science & Business Media ISBN: 940092352X Category : Science Languages : en Pages : 534
Book Description
This volume certainly is a Conference Proceedings, the Proceedings of the NATO Advanced Research Workshop (ARW) on "Unsaturated Flow in Hydrologic Modeling" held at "Les Villages du Soleil" near ArIes, France from June 13 to 17, 1988. Let me therefore acknowledge properly, at the very beginning, the gratitude of all the participants to the NATO Science Committee for its generous support and worthwhile goal of bringing together scientists of many countries to communicate and share their experiences. Particular thanks are extended to the director of the program, Dr. Luis Vega da Cunha for his interest and understanding. On the other hand this volume is also, and probably more so, a Textbook that fills a gap in the field of unsaturated flow. Many treatises on the subject present the theory in its different aspects. Hardly any explain in details how the different pieces can be put together to address realistic problems at the basin scale. The various invited contributions to the ARW were structured in a subject progression much as chapters are organized in a book. The intent of the ARW was to assess the current state of knowledge in "Unsaturated Flow" and its use in "Hydrologic Modeling Practice". In a sense the interest in fundamentals of unsaturated flow in this ARW was not just for the sake of knowledge but also and primarily for the sake of action. Can such fundamental knowledge be utilized for better management of the water resource? was the basic question.
Author: Margaret Jubb Publisher: Routledge ISBN: 9780071440509 Category : French language Languages : en Pages : 0
Book Description
Taking authentic texts from a variety of sources - the human body on CD-ROM, a fish recipe, 'L'Etranger' and many others - this book uses them as a starting point for the illustration and explanation of key areas of French grammar. It includes a range of exercises, many of them text-based.
Author: National Research Council Publisher: National Academies Press ISBN: 0309083400 Category : Science Languages : en Pages : 137
Book Description
Concerns over the potential ecological effects of fishing have increased with the expansion of fisheries throughout the marine waters of the United States. Effects of Trawling and Dredging on Seafloor Habitat describes how assessment of fishing impacts depends on gear type, number and location of bottom tows, and the physical and biological characteristics of seafloor habitats. Many experimental studies have documented acute, gear-specific effects of trawling and dredging on various types of habitat. These studies indicate that low mobility, long-lived species are more vulnerable to towed fishing gear than short-lived species in areas where the seabed is often disturbed by natural phenomena. Trawling and dredging may also change the composition and productivity of fish communities dependent on seafloor habitats for food and refuge. The scale of these impacts depends on the level of fishing effort. This volume presents color maps of fishing effort for all regions with significant bottom trawl or dredge fisheries-the first time that such data has been assembled and analyzed for the entire nation.
Author: Bruno Voituriez Publisher: UNESCO ISBN: Category : Science Languages : en Pages : 132
Book Description
El Nino, caprice of the heavens, scapegoat for every calamity? The general public cannot really understand what is behind the El Nino phenomenon. The book offers a tour of the Earth's climate to understand one of its normal but extreme components.
Author: François Bourrin
Author: François Bourrin
Author: Collectif
Author: Rob Young
Author: Jacqueline Ki-Zerbo
Author: Jay Stratton Noller
Author: H.J. Morel-Seytoux
Author: Margaret Jubb
Author: Varyl R. Thorndycraft
Author: National Research Council
Author: Bruno Voituriez