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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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: Ian Paul Gottschalk
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
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.
Author: Die deutsche Nationalbibliothek
Publisher:
ISBN:
Category :
Languages : de
Pages : 830
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Book Description
Author:
Publisher:
ISBN:
Category : Saltwater encroachment
Languages : en
Pages : 64
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Book Description
