Author: John S. Selker
Publisher:
ISBN:
Category :
Languages : en
Pages : 512

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Book Description

Author: L. Gray Wilson
Publisher: Routledge
ISBN: 1351441949
Category : Technology & Engineering
Languages : en
Pages : 786

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Book Description
This book is written in a simple, straightforward manner without complicated mathematical derivatives. Compiled by experienced practitioners, this guide covers topics such as basic principles of vadose zone hydrology and prevalent monitoring techniques. Case studies present actual field experiences for the benefit of the reader. The Handbook provides practitioners with the information they need to fully understand the principles, advantages, and limitations of the monitoring techniques that are available. The Handbook of Vadose Zone Characterization & Monitoring expands and consolidates the useful and succint information contained in various ASTM documents, EPA manuals, and other similar texts on the subject, making it an invaluable aid to new practioners and a useful reference for seasoned veterans in the field.

Author: Jan M. H. Hendrickx
Publisher:
ISBN:
Category : Groundwater flow
Languages : en
Pages : 52

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Book Description

Author: V.P. Singh
Publisher: Springer Science & Business Media
ISBN: 9401103933
Category : Science
Languages : en
Pages : 284

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Book Description
Water is vital to life, maintenance of ecological balance, economic development, and sustenance of civilization. Planning and management of water resources and its optimal use are a matter of urgency for most countries of the world, and even more so for India with a huge population. Growing population and expanding economic activities exert increasing demands on water for varied needs--domestic, industrial, agricultural, power generation, navigation, recreation, etc. In India, agriculture is the highest user of water. The past three decades have witnessed numerous advances as well as have presented intriguing challenges and exciting opportunities in hydrology and water resources. Compounding them has been the growing environmental consciousness. Nowhere are these challenges more apparent than in India. As we approach the twenty first century, it is entirely fitting to take stock of what has been accomplished and what remains to be accomplished, and what accomplishments are relevant, with particular reference to Indian conditions.

Author: Jacques W. Delleur
Publisher: CRC Press
ISBN: 9781420048582
Category : Technology & Engineering
Languages : en
Pages : 1006

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Book Description
Due to the increasing demand for adequate water supply caused by the augmenting global population, groundwater production has acquired a new importance. In many areas, surface waters are not available in sufficient quantity or quality. Thus, an increasing demand for groundwater has resulted. However, the residence of time of groundwater can be of the order of thousands of years while surface waters is of the order of days. Therefore, substantially more attention is warranted for transport processes and pollution remediation in groundwater than for surface waters. Similarly, pollution remediation problems in groundwater are generally complex. This excellent, timely resource covers the field of groundwater from an engineering perspective, comprehensively addressing the range of subjects related to subsurface hydrology. It provides a practical treatment of the flow of groundwater, the transport of substances, the construction of wells and well fields, the production of groundwater, and site characterization and remediation of groundwater pollution. No other reference specializes in groundwater engineering to such a broad range of subjects. Its use extends to: The engineer designing a well or well field The engineer designing or operating a landfill facility for municipal or hazardous wastes The hydrogeologist investigating a contaminant plume The engineer examining the remediation of a groundwater pollution problem The engineer or lawyer studying the laws and regulations related to groundwater quality The scientist analyzing the mechanics of solute transport The geohydrologist assessing the regional modeling of aquifers The geophysicist determining the characterization of an aquifer The cartographer mapping aquifer characteristics The practitioner planning a monitoring network

Author: Dusica Jevremovic
Publisher:
ISBN:
Category :
Languages : en
Pages : 478

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Book Description

Author: Henoque Ribeiro Silva
Publisher:
ISBN:
Category : Irrigation
Languages : en
Pages : 376

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Book Description
Intermittent application of water into many soils produces changes in soil structure and hydraulic properties, resulting in faster advance with less volume of applied water as compared with continuous application. Two distinct soils, a Millville silt loam and a Red-yellow oxisol, were used to study the susceptibility of soil structure to the effects of wetting and drying. Ethanol was used to characterize the condition prior to water application and to distinguish between effects of wetting and drying (by water) on the structure of an unstable soil. The objective of this study was to quantify and show structural changes that affect soil hydraulic properties. Air entrapment effects on infiltration processes during intermittent and continuous water application were also studied. Laboratory and field experiments were carried out to achieve the objectives of this study. Important aspects of soil structural changes were identifyied by measurements with water and ethanol. The major changes were (a) reduction in porosity and (b) pore size distribution. Results reconfirmed that intermittent application of water is an efficiency way to decrease intake rates. An accentuated reduction in intake during the first surge was followed by a smaller reduction in subsequent surges. Similar trends were observed between first and second irrigations for continuous application. The Philip's infiltration model parameters (sorptivity and the parameter A), obtained from the best-fit-of-all measured infiltration data, were used to indicate effects of wetting and drying on soil structure, hence on soil physical properties. Using a Millville silt loam pre-wetting characterization, we verified that ethanol showed little or no effect on soil structure. This allowed study of differential effetcs on the saturated hydraulic conductivity for an unstable soil under wetting and drying conditions. The excepcional predictability of advance trajectories under intermittent and continnuous flow, based on infiltration information only, was demonstrated by a simple advance model. This model emphasized the dominant role of the infiltration process on the performance of surface irrigation systems. The major advantages of the model reside in modest parameter requirements and simplicity, while retaining the main features of the physical process.

Author: National Research Council
Publisher: National Academies Press
ISBN: 0309170990
Category : Science
Languages : en
Pages : 398

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Book Description
Fluid flow and solute transport within the vadose zone, the unsaturated zone between the land surface and the water table, can be the cause of expanded plumes arising from localized contaminant sources. An understanding of vadose zone processes is, therefore, an essential prerequisite for cost-effective contaminant remediation efforts. In addition, because such features are potential avenues for rapid transport of chemicals from contamination sources to the water table, the presence of fractures and other channel-like openings in the vadose zone poses a particularly significant problem, Conceptual Models of Flow and Transport in the Fractured Vadose Zone is based on the work of a panel established under the auspices of the U.S. National Committee for Rock Mechanics. It emphasizes the importance of conceptual models and goes on to review the conceptual model development, testing, and refinement processes. The book examines fluid flow and transport mechanisms, noting the difficulty of modeling solute transport, and identifies geochemical and environmental tracer data as important components of the modeling process. Finally, the book recommends several areas for continued research.

Author: H. Magdi Selim
Publisher: CRC Press
ISBN: 1000115178
Category : Science
Languages : en
Pages : 500

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Book Description
Physical Nonequilibrium in Soils provides cutting-edge knowledge on physical nonequilibrium phenomena in soils, offering unique insight into the complexity of our physical world. With 18 chapters comprising the book, topics cover soil properties fluid properties mechanistic models transfer function geostatistics fractal analysis cellular-automation fluids coupling of physical and chemical nonequilibrium models confirming and quantifying physical nonequilibrium in soils analytical solutions field-scale research environmental impacts.

Author: Philippe Baveye
Publisher: CRC Press
ISBN: 135136569X
Category : Technology & Engineering
Languages : en
Pages : 400

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Book Description
The application of fractals and fractal geometry in soil science has become increasingly important over the last few years. This self-contained and timely book was designed to provide detailed and comprehensive information on the current status of the application of fractal geometry in soil science, and on prospects for its future use. With a detailed and specific introductory chapter, particular attention is paid to comparing and contrasting "fractal" and "fragmentation" concepts. Some uses of fractals, such as to quantify the retention and transport properties of soils, to describe the intricate geometry of pore surfaces and macropore networks, or to elucidate the rooting patterns of various plants, are discussed. Applications of fractals in soil science are both relatively recent and in constant evolution. This book reflects accurately existing trends, by allowing sharp differences among the viewpoints expressed in contributed chapters to be presented to the reader in one self-contained volume.