Groundwater Flow Modelling Under Past Ice-sheets
Author : Arnaud Sterckx
Publisher :
Page : 93 pages
File Size : 21,68 MB
Release : 2017
Category :
ISBN :
Author : Arnaud Sterckx
Publisher :
Page : 93 pages
File Size : 21,68 MB
Release : 2017
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ISBN :
Author : Olivier Jaquet
Publisher :
Page : 51 pages
File Size : 26,71 MB
Release : 2010
Category : Groundwater flow
ISBN :
Author : Carolyn A. Moeller
Publisher :
Page : 142 pages
File Size : 30,73 MB
Release : 2004
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Author :
Publisher :
Page : pages
File Size : 40,2 MB
Release : 2019
Category :
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Author : Oliver Jaquet
Publisher :
Page : 65 pages
File Size : 44,36 MB
Release : 2013
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Author : John Menzies
Publisher : Elsevier
Page : 859 pages
File Size : 39,9 MB
Release : 2017-11-28
Category : Science
ISBN : 0081005253
Past Glacial Environments, Second Edition, presents a revised and updated version of the very successful first edition of Menzies' book, covering a breadth of topics with a focus on the recognition and analysis of former glacial environments, including the pre-Quaternary glaciations. The book is made up of chapters written by various geological experts from across the world, with the editor's expertise and experience bringing the chapters together. This new and updated volume includes at least 45% new material, along with five new chapters that include a section on techniques and methods. Additionally, this new edition is presented in full color and features a large collection of photographs, line diagrams, and tables with examples of glacial environments and landscapes that are drawn from a worldwide perspective. Informative knowledge boxes and case studies are included, helping users better understand critical issues and ideas. - Provides the most complete reference concerning the study of glacial processes and their geological, sedimentological, and geomorphological products - Comprised of chapters written by various geological experts from across the world - Includes specific case studies to alert readers to important ideas and issues - Uses text boxes throughout to explain key concepts from glacial literature - Presents full color photographs, line diagrams, and tables throughout
Author : Peter G. Knight
Publisher : John Wiley & Sons
Page : 544 pages
File Size : 38,80 MB
Release : 2008-04-15
Category : Science
ISBN : 0470750235
Glacier Science and Environmental Change is an authoritative and comprehensive reference work on contemporary issues in glaciology. It explores the interface between glacier science and environmental change, in the past, present, and future. Written by the world’s foremost authorities in the subject and researchers at the scientific frontier where conventional wisdom of approach comes face to face with unsolved problems, this book provides: state-of-the-art reviews of the key topics in glaciology and related disciplines in environmental change cutting-edge case studies of the latest research an interdisciplinary synthesis of the issues that draw together the research efforts of glaciologists and scientists from other areas such as geologists, hydrologists, and climatologists color-plate section (with selected extra figures provided in color at www.blackwellpublishing.com/knight). The topics in this book have been carefully chosen to reflect current priorities in research, the interdisciplinary nature of the subject, and the developing relationship between glaciology and studies of environmental change. Glacier Science and Environmental Change is essential reading for advanced undergraduates, postgraduate research students, and professional researchers in glaciology, geology, geography, geophysics, climatology, and related disciplines.
Author : Melissa Barnard
Publisher :
Page : 253 pages
File Size : 40,7 MB
Release : 2016
Category :
ISBN :
Current geologic and climatic conditions need to be considered when choosing an appropriate site for a Deep Geologic Repository (DGR). However, given the million-year timeframe for the radioactivity of the used fuel to reduce to that of its natural uranium content and the record of repeated glacial cycles in the Northern hemisphere over the past million years, the impact of glaciation on the DGR also needs to be considered. Simplifying assumptions are often made in such paleo-climate modelling analyses involving permafrost and glaciation and include the assumptions that fluid flow is isothermal and fully-saturated and the phreatic surface in the permafrost is within metres of the topographic surface. Those assumptions were examined using a modelling approach that included thermal transport and flow conditions with an alternate conceptualization of the water table boundary conditions to develop a more detailed representation of the impact and glacial and periglacial conditions on the groundwater flow system. Two computational models, FRAC3DVS-OPG and COMSOL Multiphysics, were used to carry out those investigations. The numerical models of the Greenland Analogue Project (GAP) study site that investigated groundwater flow and permafrost near the edge of the Greenland Ice Sheet (GIS) and a proposed DGR site in Southern Ontario were used to examine the impact of permafrost on the water table for fully-saturated and variably-saturated flow conditions. Those analyses demonstrated that with the presence of permafrost, the use of a prescribed head boundary condition did not allow drainage that may occur when the recharge to permafrost is set to zero. Permafrost will not allow enough recharge to maintain fully-saturated conditions, and the system will drain beneath it.
Author : Patrik Vidstrand
Publisher :
Page : pages
File Size : 21,4 MB
Release : 2017
Category :
ISBN :
Author : Simon Seelig
Publisher : Springer Nature
Page : 170 pages
File Size : 31,41 MB
Release : 2022-03-07
Category : Science
ISBN : 3658370734
Alpine aquifers play a critical role in the hydrology of mountainous areas by sustaining base flow in downstream rivers during dry periods and retarding flood propagation after heavy precipitation events. Progressing climate change alters climatic and meteorological boundary conditions as well as the hydraulic response of alpine catchments by ablating glaciers and thawing permafrost. Rock glaciers exert a controlling influence on the catchment response due to their prominent groundwater storage and complex drainage characteristics. This thesis investigates the hydrogeology and internal structure of the active rock glacier Innere Ölgrube (Ötztal Alps), which governs catchment runoff and is affected by permafrost degradation. A 3D geometrical model of its internal structure is obtained by combining geophysical data and permafrost creep modelling. Available data and new results are integrated into a conceptual hydrogeological model providing a sound basis for the implementation of a prospective numerical groundwater flow model. Hydraulic properties of the hydrostratigraphic units constituting the rock glacier are estimated and groundwater recharge fluxes quantified. Fundamental properties of the heterogeneous groundwater flow system within the rock glacier are discussed and compared to existing rock glacier studies.