Numerical Modeling of Possible Saltwater Intrusion Mechanisms in the Multiple Layer Coastal Aquifer System of the Gulf of Thailand PDF Download
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Author: Phatcharasak Arlai
Publisher: kassel university press GmbH
ISBN: 3899582934
Category :
Languages : en
Pages : 180
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Book Description
Author: Phatcharasak Arlai
Publisher: kassel university press GmbH
ISBN: 3899582934
Category :
Languages : en
Pages : 180
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Book Description
Author: Cecilia Tortajada
Publisher: Routledge
ISBN: 1317850343
Category : Nature
Languages : en
Pages : 224
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Book Description
Asia's 48 countries have an estimated 1.757 billion urban population and 2.4 billion people in rural areas (or approximately 60 per cent of the global population). Divided into central, eastern, southern, south-eastern and western regions, the continent is also extremely heterogeneous in terms of water quality conditions. The policies and management practices vary significantly from one country to another, and even within one country, depending on specific economic, political, social, environmental, legal and institutional factors. In order to appreciate the complexities associated with water quality policy and management, it is important to acknowledge the multiplicity of interrelated and often conflicting events, issues, actors and interests, both within and outside the water sector that impact them. This complexity, alongside institutional inability for systematic and coordinated collaboration, are potent reasons as to why, in the second decade of the 21st century, formulation and implementation of efficient water quality management policies benefitting humankind and the environment have still not been achieved. The book was originally published as a special issue of the International Journal of Water Resources Development.
Author: Hedeff I. Essaid
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 200
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Book Description
Author: Minh Thuan Tran
Publisher: IOS Press
ISBN: 9789040724800
Category : Technology & Engineering
Languages : en
Pages : 202
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Book Description
"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."
Author: Samuel F. Atkinson
Publisher: CRC Press
ISBN: 1351084984
Category : Science
Languages : en
Pages : 409
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Book Description
This book provides a summary of the status and potential for salt water intrusion into ground water in the contiguous united states. While the focus is on resultant limitation in the agricultural usage of ground water, the book is not limited to this singular limitation in resource usage.
Author: Bob D. Newport
Publisher:
ISBN:
Category : Saltwater encroachment
Languages : en
Pages : 44
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Book Description
Author: Emilio Custodio
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 796
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Book Description
Author: Boutaina Bouzouf
Publisher:
ISBN:
Category :
Languages : en
Pages : 71
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Book Description
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.
Author: Die deutsche Nationalbibliothek
Publisher:
ISBN:
Category :
Languages : de
Pages : 830
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Book Description
Author: Chan-Hee Park
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages :
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Book Description
Utilizing the analytical solution of the steady state sharp interface saltwater intrusion model in coastal aquifers, a multi-objective optimization formulation of pumping rates and well locations in a coastal aquifer is formulated to solve problems in water management practice. The proposed optimization problem uses progressive genetic algorithm technique and the method developed is applied to the previous work of Cheng et al. [2000]. Through this analysis, several other applications are provided to demonstrate the use of the model in practical applications. This work is the first to optimize pumping rates as well as well locations simultaneously in coastal aquifer management. Known the limitation of the analytical solution, the work is expanded to cover the physics of saltwater intrusion in a more realistic way. This is variable density flow in a variably saturated porous medium. In this method, mixing between two fluids such as saltwater and freshwater can be described and the porous medium is also expanded to cover saturated and unsaturated zones together. One of the objectives is to develop a three dimensional physical model, verify the model, and apply to various applications in coastal aquifers. The developed model, TechFlow, is used to investigate instability issues associated with the numerical solution of the Elder problem in the perspective that includes physical instability issues associated with density differences used in numerical solutions, sensitivity of the solution to idealization irregularity, and the importance of accurate estimation of the velocity field and its association to the grid density levels that is necessary to solve the problem accurately. Saltwater intrusion hydrodynamics in a beach under the influence of tidal effects is also investigated using TechFlow. Based on the results of TechFlow with the use of various boundary conditions for the transport equation, the saltwater intrusion hydrodynamics in a beach under the influence of tidal effects shows unique dynamics. These solutions are primarily affected by density differences, tidal effects on a mild slope, variably saturated porous medium and finite domain solution condition. TechFlow is also used to investigate saltwater upconing beneath pumping wells both two- and three-dimensional applications.
