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Climate change is expected to modify the hydrological cycle and affect freshwater resources. Groundwater is a critical source of fresh drinking water for almost half of the worlds population and it also supplies irrigated agriculture. Groundwater is also important in sustaining streams, lakes, wetlands, and associated ecosystems. But despite this,
There is a general consensus that for the next few decades at least, the Earth will continue its warming. This will inevitably bring about serious environmental problems. For human society, the most severe will be those related to alterations of the hydrological cycle, which is already heavily influenced by human activities. Climate change will directly affect groundwater recharge, groundwater quality and the freshwater-seawater interface. The variations of groundwater storage inevitably entail a variety of geomorphological and engineering effects. In the areas where water resources are likely to diminish, groundwater will be one of the main solutions to prevent drought. In spite of its paramount importance, the issue of 'Climate Change and Groundwater' has been neglected. This volume presents some of the current understanding of the topic.
Cambridge, UK : Cambridge University Press, 1998.
This volume focuses on approaches towards a better understanding of the geological, hydrogeological and paleoclimatic evolution of Northeast Africa. Among the topics discussed are Phanerozoic interplate dynamics, sedimentology and stratigraphy, and mineral deposits and metallogeny.
Groundwater is Africa’s most precious natural resource, providing reliable water supplies for many people. Further development of groundwater resources is fundamental to increasing access to safe water across the continent to meet coverage targets and reduce poverty. There is also an increasing interest in the use of groundwater for irrigated agriculture as the climate becomes more variable. Sustainable development of the resource is not a trivial task and depends crucially on an understanding of the hydrogeology and people with the skills to make informed decisions on how groundwater can best be developed and managed in a sustainable fashion. Despite these obvious needs, however, little attention has been paid to the systematic gathering of information about groundwater resources in the past few decades, with the result that data are patchy, knowledge is limited and investment is poorly targeted. This book was written to start to bridge the knowledge gap. The 29 chapters are written by a combination of practitioners and researchers mainly from within Africa using experience from recent and ongoing projects. The chapters highlight the complexity and variety of issues surrounding the development and management of groundwater resources across Africa, and provide a snapshot of groundwater research and application in the early 21st century. Chapters range from strategic discussions of the role of groundwater in development and poverty reduction, to case studies on techniques used to develop groundwater, and modelling methods for managing groundwater systems.
The Great Sand Sea in Egypt presents the history of one of the large sand seas in the Sahara, beginning with the sand supply by fluvial transport from partly distant areas and also by local sandstone weathering. It also details sand as carrier of information and shows the possibilities of sedimentary analysis in dealing with such a topic. Simple measurements may supply important information (e.g. salinity measurements). Well known methods can be developed further to answer special questions. A wealth of information can be drawn from especially adapted sedimentological investigations. In the end, bits of information from different analytical sources can be put together to reveal the history of a large sand sea.*Analyzes different geological sources to decipher the history of the Great Sand Sea*Presents the possibilities of sedimentary analysis to interpret the history of an area*Develops well-known methods to further answer special questions
This is the only volume to present significant results of research into the Pleistocene of the Western Desert of Egypt. Research on Pleistocene prehistoric remains in Dakhleh Oasis began during survey in the 1978 Dakhleh Oasis Project (DOP) season, with discovery of the ubiquity of stone artefacts. Dedicated work by both prehistorians and environmentalists continued until 2011. Comparative DOP reconnaissance and geological work in Kharga Oasis began in 1987, which morphed into the Kharga Oasis Prehistory Project (KOPP) in 2001. Papers on the Pleistocene research are focused on geoarchaeological and palaeo-environmental data, reporting on different aspects of the off-site fieldwork conducted in the oases. Pleistocene finds and sequence are included. Detailed analyses of palaeolakes, the meteoritic Dakhleh Event, chronometric dating, and the 'empty desert hypothesis' employ state of the art research strategies and techniques to provide important information on Pleistocene human uses and habitability in the Western Desert. A summary paper and a Catalogue of Pleistocene localities recorded in the Dakhleh Oasis survey are provided. The volume will be a major contribution to the publication of the results of several decades of work in a region where fieldwork is now increasingly difficult. This will be the only volume in which the significant results of the research into the Pleistocene of the Western Desert of Egypt appear. This has been undertaken under the auspices of the Dakhleh Oasis Project and its off-shoot The Kharga Oasis Prehistory Project. The preliminary results have been presented at various conferences and in articles that have all been well received. They incorporate state of the art research strategies and dating techniques. The volume will be a major contribution to the publication of the results of several decades of work in a region where fieldwork is now increasingly difficult.