Download or read book Response to Tides of Coastal Aquifers written by John Arthur Williams and published by . This book was released on 1975 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report on the influence of an oscillating water table on storativity or the effective porosity near ʻEwa Beach and in the Honolulu Harbor.
Download or read book The Response to Tidal Fluctuations of Two Non homogeneous Coastal Aquifer Models written by John Arthur Williams and published by . This book was released on 1971 with total page 70 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 The Response of Aquifers to the Earth Tides written by Brian Yukio Kanehiro and published by . This book was released on 1979 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sea Water in Coastal Aquifers written by Hilton H. Cooper and published by . This book was released on 1964 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 Influence of Oceanic Forcing on Fate of Nutrients in a Near shore Aquifer written by Nawrin Anwar and published by . This book was released on 2012 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: A reactive groundwater transport model has been developed to investigate the fate of nutrients (ammonium, nitrate, and phosphate) in a near-shore coastal aquifer subject to oceanic forcing (tides and waves) and their subsequent discharge to coastal waters. The model is developed by combining the variable-density groundwater flow model SEAWAT-2005 with the reactive multi-component transport model PHT3D v2.10. The influence of tides and waves are typically neglected in prior studies that have examined the transport and transformation of nutrients in coastal aquifers. Oceanic forcing however can induce a highly dynamic surficial salt-freshwater mixing and reaction zone in a near-shore aquifer and this may modify the transport pathways and concentrations of discharging nutrients. The reactions considered in the model include denitrification, nitrification, aerobic degradation of dissolved organic matter, iron oxidation, and phosphate adsorption. The reaction network implemented, including the kinetic rate expressions, has been verified previously by numerical simulations conducted for a near-shore aquifer not exposed to oceanic forcing. The simulations conducted reveal that oceanic forcing significantly modifies the discharge pathway of the groundwater-derived nutrients and the reactions occurring along this pathway. This alters the net production and consumption of nutrients in the near-shore aquifer and their subsequent loading rates to coastal waters. It is further shown that the fate of the nutrients is strongly controlled by the availability of chemical species including dissolved organic matter in seawater recirculating through the near-shore sediments. Moreover, for the conditions simulated, tides led to more intense salt-freshwater mixing in the near-shore aquifer and thus greater transformations of nutrients in the near-shore aquifer compared to regular wave forcing. This study significantly enhances conceptual understanding of the processes controlling the fate of nutrients in a near-shore aquifer and hence provides a valuable tool for improving prediction of nutrient loading rates to coastal waters.
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 Water Levels Chloride Concentrations and Pumpage in the Coastal Aquifers of Delaware and Maryland written by Daniel J. Phelan and published by . This book was released on 1988 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tidal Dynamics in Coastal Aquifers written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sea water Intrusion Into Coastal Aquifers in Washington 1978 written by N. P. Dion and published by . This book was released on 1985 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book TIDE INDUCED PERIODIC GROUNDWA written by Hailong Li and published by Open Dissertation Press. This book was released on 2017-01-27 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Tide-induced Periodic Groundwater and Air Flows in Coastal Aquifer Systems" by 李海龍, Hailong, Li, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3124445 Subjects: Aquifers - China - Hong Kong Tidal currents - China - Hong Kong Groundwater flow - China - Hong Kong Groundwater - Air sparging - China - Hong Kong
Download or read book Seawater Circulation in Coastal Aquifers written by Hanan Nadim Karam and published by . This book was released on 2012 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis explores the subterranean domain of chemical cycling in coastal oceans abutting permeable aquifers, where transport through sediments is dominated by advection, rather than diffusion. We investigate the mechanisms by which seawater circulates in the subsurface over a range of spatio-temporal scales, and the chemical reactions to which this circulation is coupled. Seawater circulation in coastal aquifers is driven by salinity variations in pore water as well as by the effects of temporally variable forcings at both terrestrial (variable recharge) and marine (tides, waves and secular sea level changes) boundaries. It is coupled to the transport of biogeochemically reactive species through the subsurface and their exchange between the sediments and the water column. Our understanding of how different forcing mechanisms interact to determine spatial scales and residence times of subsurface seawater circulation, as well as temporal patterns and rates of aquifer-surface water exchange has thus far been very limited. The large range in the spatial and temporal scales of flow dynamics associated with different forcings challenges our ability to comprehensively observe and monitor their associated seafloor fluxes. In this thesis, we present a novel, homemade instrument for high-resolution, long-term monitoring of seafloor fluxes, designed to address this challenge. Two-year deployments of several such instruments at Waquoit Bay, MA, produced the most comprehensive datasets on seafloor fluxes available to date, multiplying the length of published time series by tenfold. The length and integrity of the datasets permit the use of spectral analysis to investigate distinct frequency components of seafloor fluxes and quantify their relationship to various forcing mechanisms. The temporal and areal coverage of the datasets allow us to distinguish the contributions of different forcings to observed fluxes, as a function of distance from shore and season. Furthermore, we discuss new insight derived from the data into the physics underlying observed seafloor fluxes and their associated subsurface circulation processes. Additionally, we describe results from an independent but related project to characterize chemical dynamics associated with seawater circulation in beach sand at Waquoit Bay. We present evidence for the important contribution of this circulation to the nitrogen budget of the Bay.
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 Earthquakes and Water written by Chi-yuen Wang and published by Springer. This book was released on 2010-01-11 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the graduate course in Earthquake Hydrology at Berkeley University, this text introduces the basic materials, provides a comprehensive overview of the field to interested readers and beginning researchers, and acts as a convenient reference point.
Download or read book Coastal Environments and Global Change written by Gerd Masselink and published by John Wiley & Sons. This book was released on 2014-04-23 with total page 1147 pages. Available in PDF, EPUB and Kindle. Book excerpt: The coastal zone is one of the most dynamic environments on our planet and is much affected by global change, especially sea-level rise. Coastal environments harbour valuable ecosystems, but they are also hugely important from a societal point of view. This book, which draws on the expertise of 21 leading international coastal scientists, represents an up-to-date account of coastal environments and past, present and future impacts of global change. The first chapter of the book outlines key principles that underpin coastal systems and their behaviour. This is followed by a discussion of key processes, including sea level change, sedimentation, storms, waves and tides, that drive coastal change. The main part of the book consists of a discussion of the main coastal environments (beaches, dunes, barriers, salt marshes, tidal flats, estuaries, coral reefs, deltas, rocky and glaciated coasts and coastal groundwater), and how these are affected by global change. The final chapter highlights strategies for coping with coastal change. Readership: final year undergraduate and postgraduate-level students on coastal courses in a wide range subjects, including geography, environmental management, geology, oceanography and coastal/civil engineering. The book will also be a valuable resource for researchers and applied scientists dealing with coastal environments. Additional resources for this book can be found at: www.wiley.com/go/masselink/coastal
