Download or read book Study and Modelling of Saltwater Intrusion Into Aquifers written by Emilio Custodio and published by . This book was released on 1993 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Seawater Intrusion in Coastal Aquifers written by Jacob Bear and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal aquifers serve as major sources for freshwater supply in many countries around the world, especially in arid and semi-arid zones. Many coastal areas are also heavily urbanized, a fact that makes the need for freshwater even more acute. Coastal aquifers are highly sensitive to disturbances. Inappropriate management of a coastal aquifer may lead to its destruction as a source for freshwater much earlier than other aquifers which are not connected to the sea. The reason is the threat of seawater intrusion. In many coastal aquifers, intrusion of seawater has become one of the major constraints imposed on groundwater utilization. As sea water intrusion progresses, existing pumping wells, especially those close to the coast, become saline and have to be abandoned. Also, the area above the intruding seawater wedge is lost as a source of natural replenishment to the aquifer. Despite the importance of this subject, so far there does not exist a book that integrates our present knowledge of seawater intrusion, its occurrences, physical mechanism, chemistry, exploration by geo physical and geochemical techniques, conceptual and mathematical modeling, analytical and numerical solution methods, engineering measures of combating seawater intrusion, management strategies, and experience learned from case studies. By presenting this fairly comprehensive volume on the state-of-the-art of knowledge and ex perience on saltwater intrusion, we hoped to transfer this body of knowledge to the geologists, hydrologists, hydraulic engineers, water resources planners, managers, and governmental policy makers, who are engaged in the sustainable development of coastal fresh ground water resources.

Download or read book Salinity Environment Plants Molecules written by André Läuchli and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: In biology, the very big global and thevery small molecular issues currently appear to be in the limelight ofpublic interest and research funding policies. They are in danger of drifting apart from each other. They apply very coarse and very fine scaling, respectively, but coherence is lost when the various intermediate levels of different scales are neglected. Regarding SALINITY we are clearly dealing with a global problem, which due to progressing salinization of arable land is of vital interest for society. Explanations and basic understanding as well as solutions and remedies may finally lie at the molecular level. It is a general approach in science to look for understanding of any system under study at the next finer (or "lower") level of scaling. This in itself shows that we need a whole ladder of levels with increasingly finer steps from the global impact to the molecular bases of SALINITY relations. It is in this vein that the 22 chapters of this book aim at providing an integrated view of SALINITY.

Download or read book Glacier Science and Environmental Change written by Peter G. Knight and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Advances in the Research of Aquatic Environment written by Nicolaos Lambrakis and published by Springer Science & Business Media. This book was released on 2011-11-02 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book focuses on the management of the aquatic environment. It is aimed at scientists, students, governmental officials and specialists dealing with groundwater and environment. Its main goal is to inform the reader of ideas, knowledge and experience in terms of a sustainable aquatic environment. The main topics are as follows: Water Bodies and Ecosystems; Climate Change and Water Bodies; Water quality and agriculture; Interaction of Surface and ground waters; Karst Hydrogeology; Continuous Media Hydrogeology; Fissured Rocks Hydrogeology; Hydrochemistry; Geothermics and thermal waters; The role of water in construction projects; Hydrology

Download or read book Numerical Simulation of Saltwater Intrusion in Coastal Aquifers written by Boutaina Bouzouf and published by . This book was released on 2015 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: The modeling of groundwater in costal aquifers is an important and difficult issue in water resources. The primary difficulty resides in efficient and accurate simulation of the movement of the saltwater front. This thesis is devoted to the sharp interface numerical study of one and two dimensional of seawater intrusion into coastal aquifers. The Finite Volume method is adopted here to solve the set of simultaneous diffusion differential equations describing the motion of saltwater and freshwater separated by a sharp interface. These diffusion equations are based on the Dupuit approximation and are obtained from integration over the vertical dimension. The one dimensional Finite Volume model is first being validated using academic test case studies with known close from solutions. The second purpose of this study is to compare two dimensional numerical methods, Finite Volume method and Sharp model based on Finite Difference method when applied to a Llobregat aquifer, in Barcelona, Spain. Both methods are using the same mathematical formulation for the sharp interface. The comparison between both methods indicates that Finite Volume method provides predictions closer to the observed results.

Download or read book Seawater Intrusion in Coastal Aquifers written by and published by Food & Agriculture Org.. This book was released on 1997 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Modeling of Possible Saltwater Intrusion Mechanisms in the Multiple Layer Coastal Aquifer System of the Gulf of Thailand written by Phatcharasak Arlai and published by kassel university press GmbH. This book was released on 2007 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coastal Hydrogeology written by Jimmy Jiao and published by Cambridge University Press. This book was released on 2019-05-09 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offers a comprehensive volume discussing groundwater problems in coastal areas, spanning fundamental science to practical water management.

Download or read book Hydrogeophysical Modeling of Saltwater Intrusion written by Ian Paul Gottschalk and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal aquifers worldwide are under threat of saltwater intrusion, in which seawater migrates into terrestrial aquifers, resulting in the loss of fresh groundwater resources. It is critical for proactive groundwater management to understand the current state and development of the salinity distribution due to saltwater intrusion. The data used to monitor the salinity distribution commonly come from boreholes, which, while useful, are limited in spatial sampling and often do not provide sufficient detail to fully capture the lateral variations in lithology and salinity seen in coastal regions experiencing saltwater intrusion. The geophysical airborne electromagnetic (AEM) method has been used increasingly to support groundwater management at the regional scale. In this thesis, I investigate the use of the AEM method to inform the modeling of saltwater intrusion. The study area for this thesis is the coastal Salinas Valley, CA, where saltwater has migrated, in some locations, over 10 km inland; the rate and inland extent of saltwater intrusion have been exacerbated by high rates of groundwater extraction to support agriculture in the area. Understanding the complex pattern of salinity and unique hydrogeology of the study area are the first steps to modeling the evolution of the salinity distribution. I analyzed AEM data, collected in the study area, to understand the distribution of fresher water and saltwater in the three principal aquifers within the study area. The distribution of fresher water in the upper two aquifers illustrates a hydrogeologic process that mitigates saltwater intrusion, while the distribution of saltwater in the lower two aquifers reveals locations where saltwater can quickly migrate downward from one aquifer to the other. I conducted a synthetic experiment with the goal of understanding the complexity of a numerical model of saltwater intrusion necessary to accurately predict the salinity distribution, as well as the information contained within acquired AEM data to inform such a model. I found a set of hydrogeologic processes and corresponding parameters that were necessary to predict the geometry and location of the transition zone, where the salinity varies from freshwater to saltwater. I found the parameters AEM data were most informative of, and also found that it was crucial to accurately capture the rock-physics relationship: the relationship between the material properties of the subsurface and the electrical resistivity, which the AEM data can be used to estimate. I developed a method to reduce the uncertainty in the rock-physics relationship. I used a machine-learning approach to improve estimates of the resistivity by incorporating auxiliary information at my study area that describes that location and aquifer corresponding to available measurements of material properties. I used AEM data to inform the modeling of saltwater intrusion in my study area, with the goal of reducing the uncertainty in the development of the salinity distribution. I applied the AEM data, acquired in my study area, to a numerical model of saltwater intrusion to reduce the uncertainty in the prediction of the future salinity distribution, and the rate of salinization, of the two lower aquifers in my study area. I found that the predicted future salinity, and the rate of salinization, in the aquifers was lower than was predicted before the AEM data were used to reduce uncertainty.

Download or read book The Computer Model SHARP a Quasi three dimensional Finite difference Model to Simulate Freshwater and Saltwater Flow in Layered Coastal Aquifer Systems written by Hedeff I. Essaid and published by . This book was released on 1990 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Hydrologic and Geochemical Model of Saltwater Intrusion in Cape May County New Jersey written by Christian D. Osgood and published by . This book was released on 1995 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coastal Aquifer Management Monitoring Modeling and Case Studies written by Alexander H.D. Cheng and published by CRC Press. This book was released on 2003-12-18 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approximately 70% of the world's population lives in coastal areas, and the majority of these people depend on coastal aquifers for freshwater. The fragility of these aquifers and their sensitivity to human activity demand informed, competent management to guarantee their survival. Significant knowledge and new technologies related to the subject h

Download or read book Groundwater in the Nile Delta written by Abdelazim M. Negm and published by Springer. This book was released on 2018-12-28 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique volume offers an up-to-date overview of all the main aspects of groundwater in the Nile Delta and its fringes, as well as latest research findings. The themes covered include: · Nile Delta aquifer formation and its characteristics · The use of the groundwater in the Nile Delta and its implications · Sedimentology and hydrogeophysical characteristics · Groundwater investigations and aquifer characterization using current direct resistivity and induced polarization · Groundwater contamination and degradation · Saltwater intrusion and its control · Delineation of groundwater flow and seawater intrusion using various techniques, including one-dimensional subsurface temperature profiles, geoelectrical resistivity, and integrated subsurface thermal regime and hydrogeochemical data · Modeling of groundwater and of saltwater intrusion in the Nile Delta aquifer · Excessive pumping and groundwater quality assessment for irrigation and drinking purposes · Groundwater management for sustainability in the Nile Delta. The volume appeals to postgraduate students, researchers, scientists, professionals, decision makers and planners.

Download or read book Modeling Groundwater Flow and Contaminant Transport written by Jacob Bear and published by Springer Science & Business Media. This book was released on 2010-01-18 with total page 851 pages. Available in PDF, EPUB and Kindle. Book excerpt: In many parts of the world, groundwater resources are under increasing threat from growing demands, wasteful use, and contamination. To face the challenge, good planning and management practices are needed. A key to the management of groundwater is the ability to model the movement of fluids and contaminants in the subsurface. The purpose of this book is to construct conceptual and mathematical models that can provide the information required for making decisions associated with the management of groundwater resources, and the remediation of contaminated aquifers. The basic approach of this book is to accurately describe the underlying physics of groundwater flow and solute transport in heterogeneous porous media, starting at the microscopic level, and to rigorously derive their mathematical representation at the macroscopic levels. The well-posed, macroscopic mathematical models are formulated for saturated, single phase flow, as well as for unsaturated and multiphase flow, and for the transport of single and multiple chemical species. Numerical models are presented and computer codes are reviewed, as tools for solving the models. The problem of seawater intrusion into coastal aquifers is examined and modeled. The issues of uncertainty in model input data and output are addressed. The book concludes with a chapter on the management of groundwater resources. Although one of the main objectives of this book is to construct mathematical models, the amount of mathematics required is kept minimal.

Download or read book Sustainable Desalination Handbook written by Gnaneswar Gude and published by Butterworth-Heinemann. This book was released on 2018-03-07 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable Desalination Handbook: Plant Selection, Design and Implementation provides the comprehensive knowledge base required for efficient and sustainable process design for existing and new desalination plants around the world. This valuable resource for understanding and utilizing the most recent developments in desalination technologies and methods addresses the necessary components, including process design and implementation, operational strategies, and novel discoveries that minimize environmental impacts. In addition, the book features essential illustrations, operational details, issues and potential solutions and sustainable management strategies for present and future desalination plants. Explains plant design and process selection criteria for each desalination process Presents international regulations and permitting for intake and discharge locations, design and disposal Provides energy recovery schemes, optimization and process controls Covers renewable energy sources, such as nuclear, geothermal, solar and wind powered desalination, energy storage and optimization Includes case studies of recent desalination projects and process design

Download or read book Multi objective Management Of Saltwater Intrusion In Groundwater written by Minh Thuan Tran and published by IOS Press. This book was released on 2004-01-01 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This is a Ph.D. dissertation. Groundwater aquifers are an important resource in coastal regions. In many areas where there is no fresh surface water from rivers or reservoirs, the development of ground water resources is practically the only alternative to storage of rainwater. However, the coastal aquifers are very vulnerable to the seawater intrusion through the overdraft of groundwater exploitation or insufficient recharge from upstream, etc. In order to control sea water intrusion, varying forms of saltwater intrusion management models have been studied. They address the optimal ground water pumping and recharge schedules with or without surface water supplies for conjunctive use. Contents include: Introduction, Literature Review, The Response of Saltwater Intrusion Lengths with Respect to the Stresses and Transmissivities - Sensitivity Analysis Based on the SHARP Computer Code, Conic Quadratic Programming, Development of the Methodology for the Multi-Objective Saltwater Intrusion Management Model, Hypothetical Example Results for the Quasi-Three-Dimensional SHARP Model Simulation of a One-Layered Aquifer, The Results of the Real-World Case Application, Conclusions and Recommendations."