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2 edition of Analysis of freshwater lens formation in saline aquifers found in the catalog.

Analysis of freshwater lens formation in saline aquifers

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Published .
Written in English


Edition Notes

Statementby John Patrick Glass
The Physical Object
Paginationxvii, 172 leaves :
Number of Pages172
ID Numbers
Open LibraryOL24597274M
OCLC/WorldCa5581693

Leonard Stoeckl, Georg J. Houben and Eduardo J. Dose, Experiments and modeling of flow processes in freshwater lenses in layered island aquifers: Analysis of age stratification, travel times and interface propagation, Journal of Hydrology, , (), (). To better understand climate change and global warming, researchers realize that they must address carbon emissions. A new study suggests using deep saline aquifers that are more than half a mile below the Earth’s surface, far below the freshwater sources used for human consumption, as a storage place for the would be liquefied carbon dioxide. Favourable conditions include infrequent yet intensive precipitation events, drainage depressions to collect the limited runoff, and presence of conditions (e.g. high infiltration capacity) that promote groundwater recharge and preservation (e.g. underlying saline aquifer) of infiltrating groundwater as freshwater lenses floating over saline. Under natural geographical settings, there are regions all over the world where the native groundwater quality is brackish. However, recharging from the surface water bodies (i.e., rivers and canals) establishes freshwater lenses in the upper portions of these brackish aquifers. Skimming of these freshwater lenses is a viable technique for sustaining livelihood and agricultural practices in Author: Ajay K. Vashisht, Shri K. Shakya.


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Analysis of freshwater lens formation in saline aquifers by John Patrick Glass Download PDF EPUB FB2

Freshwater lens in a static saline aquifer, then it becomes much more tractable. In this special case, it is only necessary to solve the continuity and motion equations in the freshwater region and the location of the interface, while Analysis of freshwater lens formation in saline aquifers book not initially known, can be treated by the Ghyben-Herzberg principle.

This makes it possible to formulate some. Analysis of freshwater lens formation in saline aquifers. By John Patrick Glass. Abstract (Thesis) Thesis--University of Florida.(Bibliography) Includes bibliographical references (leaves )(Statement of Responsibility) by John Patrick GlassAuthor: John Patrick Glass.

INTRODUCTION The existence offresh water overlying saline water in groundwater systemsiswidespread in many inland aquifers as well as in most coastal aquifers. These fresh groundwater lenses can be a vital ce where other surface and subsurface water supplies are Analysis of freshwater lens formation in saline aquifers book for the needs in a region.

Freshwater lenses in the unconfined Quaternary Limestone (QL) aquifer occur with generally high yields and low salinity. This aquifer consists of fine shell fragments, which in some areas has developed solution features as well as secondary cementation.

Pumping tests conducted in lens A show a widely varying hydraulic conductivity. Analytical methods were used to determine: (1) the shape and volume of the freshwater lens, (2) the elevation of the water table, (3) the depth of the freshwater/saltwater interface in the Shela aquifer, and (4) the expected change of volume resulting from change of.

In regions with saline groundwater, fresh water lenses may develop due to rainwater infiltration. The amount of fresh water that is available for e.g. agricultural crops depends on the thickness of the lens and the extent of mixing between fresh and saline water.

It is also observed that the resistivity values decrease with increase in depth of investigation. The very low resistivity is an indication that the aquifers are of poor chemical quality.

Based on the analysis of the above observations, the freshwater saline water interface of the study area is demarcated. The formation of the freshwater lens depends on different factors, such as water fluxes, potentials, and salt concentrations at the boundaries of the domain, properties of the aquifer (such as hydraulic conductivity, porosity, dispersivities), and geometry (such as aspect ratio of the domain).Cited by: Using analytical methods, the seawater/freshwater interface movement from its original position was estimated to be 35 m in lens A, m in lens B and m in lens C.

The principle aquifer on most Bahamian Island is a limestone formation with high hydraulic conductivity (Whitaker Analysis of freshwater lens formation in saline aquifers book Smart, ).

For example, high hydraulic conductivity limestone aquifers are reported in Exuma Island Analysis of freshwater lens formation in saline aquifers book Bermuda (Vacher and Wallis, ), and Andros Island of Bahamas (Ritzi et al., ).

After entering an aquifer, water moves slowly toward lower lying places and eventually is discharged from the aquifer from springs, seeps into streams, or is withdrawn from the ground by wells. Groundwater in aquifers between layers of poorly permeable rock, such as clay or shale, may be confined under pressure.

If such a confined aquifer is. A major problem of sustaining freshwater supply from freshwater lens is the invasion of saline groundwater into a fresh groundwater body. In many coastal areas saltwater intrusion has led to. Freshwater lenses in coastal aquifers and oceanic islands are the result of rainfall infiltration that accumulates above saline groundwater derived from the sea [Arnow, ].Saline groundwater is also common inland, where it is widespread at shallow to intermediate depths due to the presence of remnant marine water [El-Sayed et al., ], dissolution of evaporite deposits [Kloppmann et al Cited by: 6.

Moreover, the three scenarios can maintain a fresh water lens (at salinities less t μS cm −1) in the vicinity of the injection wells.

The formation of the fresh water lens ta 34 and 18 days for scenarios A (lowest injection rate), B and C (highest injection rate), by: 7. groundwater resources: Optimisation of isotopic techniques” was initiated in within the Nubian sandstone aquifer, Israel, and Disi Analysis of freshwater lens formation in saline aquifers book, Jordan).

• Mixing with formation water and/or brines (Nubian sandstone aquifer, Israel and Isotope data from the saline groundwater lens occurring in the northeast Guanzhong basin.

The Pleistocene aquifers are important sources of water supply in both the Gaza and Jericho areas of Palestine. The aquifers are saline with freshwater lenses floating on saline bodies of water. It is important to investigate how to exploit these freshwater lenses without causing unnecessary mixing of the fresh and saline waters.

The objective of this research is to investigate the feasibility Cited by: In this paper, the simulation and analysis of hydrate formation during CO2 injection into cold saline aquifers will provide references for the optimization of operating conditions and the prediction of CO2 storage in saline aquifers.

© The Authors. Published by Elsevier Ltd. Selection and peer-review under responsibility of by: 5. OPTIMAL STORAGE OF FRESHWATER IN SALINE AQUIFERS Küstü, M. Deniz M.

S., Department of Geological Engineering Supervisor: Prof. Hasan Yazıcıgil June99 pages Storage of freshwater in saline aquifers has a strategic importance in water deficit countries. The freshwater stored in these aquifers may be the only. The depth of the interface can be calculated from (1) groundwater elevation above sea level, (2) the density of salt water and (3) the density of fresh water.

Since saline water has a density of about g/cm3 and fresh water has a density of about g/cm3, the depth of interface in coastal aquifer can be estimated as 40 times of the.

Geology and Hydrogeology of the Caribbean Islands Aquifer System of the Commonwealth of Puerto Rico and the U.S. Virgin Islands By ROBERT A. RENKEN1, W.C. WARD2, I.P. GILL3, FERNANDO GÓMEZ-GÓMEZ1, JESÚS RODRÍGUEZ-MARTÍNEZ1, and others REGIONAL AQUIFER-SYSTEM ANALYSIS—CARIBBEAN ISLANDS.

The DGH analytical models for freshwater lenses in layered aquifers from Vacher () were generally able to reproduce the geometry of freshwater lenses in our experiments with the physical model. Since the outflow face is not included in the DGH models, the best fits were obtained for the scenarios with small outflow face by: () found freshwater in the m zone in the coastal alluvial deposits of the Gula Formation (Holocene Age) and in the aborigine settlements (Sg.

Judah) in the 5- to 7-m formation below the m zone in the semi-confined aquifer where the freshwater and saline water are separated by a horizontal interface (Fig.

These observations and. As result of density difference between seawater and fresh water in coastal aquifers, a transition zone between two Thus it is seen that the influence of saline water into coastal freshwater aquifer depends on the height of ground freshwater lenses on a small oceanic island with pumping wells, zone1 is recharge zone, zone 2 is.

The drinking water supply on barrier islands largely depends on freshwater lenses, which are also highly relevant for island ecosystems. The freshwater lens presented in this study is currently developing (since the s) below the very young eastern part of the North Sea barrier island Spiekeroog, the so-called “Ostplate.” Due to the absence of coastal protection measures, formation Cited by: 2.

A Geochemical Approach to Determine Sources and Movement of Saline Groundwater in a Coastal Aquifer by Robert Anders1, Gregory O. Mendez 2, Kiyoto Futa3, and Wesley R. Danskin Abstract Geochemical evaluation of the sources and movement of saline groundwater in coastal aquifers can aid in the initial mapping.

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 Reviews: 2.

RESEARCH ARTICLE /WR Terrestrial freshwater lenses in stable riverine settings: Occurrence and controlling factors Adrian D. Werner1,2 and Tariq Laattoe1 1School of the Environment, Flinders University, Adelaide, South Australia, Australia, 2National Centre for Groundwater Research and Training, Flinders University, Adelaide, South Australia, Australia.

In hydrology, a lens, also called freshwater lens or Ghyben-Herzberg lens, is a convex-shaped layer of fresh groundwater that floats above the denser saltwater, usually found on small coral or limestone islands and atolls.

This aquifer of fresh water is recharged through. Eeman, P. De Louw and S. Van der Zee, Cation exchange in a temporally fluctuating thin freshwater lens on top of saline groundwater Echange cationique dans une lentille d’eau douce fine fluctuant avec le temps situées au-dessus des eaux souterraines salées Intercambio catiónico en una lente de agua dulce de escaso Cited by: Groundwater history and trends in Kuwait E.

AlAli Kuwait Institute for Scientific Research, Kuwait Abstract In Kuwait, one of the GCC countries, natural resources of fresh water are very limited. Kuwait is situated in an arid coastal region characterized by high temperatures, low humidity, sparse precipitation rates, and high evaporation and.

@article{osti_, title = {Improved characterization of heterogeneous permeability in saline aquifers from transient pressure data during freshwater injection}, author = {Kang, Peter K.

and Lee, Jonghyun and Fu, Xiaojing and Lee, Seunghak and Kitanidis, Peter K. and Juanes, Ruben}, abstractNote = {Managing recharge of freshwater into saline aquifers requires accurate estimation of the.

Abstract. Salt precipitation is generated near the injection well when dry supercritical carbon dioxide (scCO 2) is injected into saline aquifers, and it can seriously impair the CO 2 injectivity of the well.

We used solid saturation to map CO 2 used as the response variable for the sensitivity analysis, and the input variables included the CO 2 injection rate (), salinity of Cited by: 2.

Thickness of the lens and the freshwater–saline water interface were determined by salinity measurements in exploration wells located at different depths. Results obtained suggest that the infiltration of rainwater into the littoral ridges causes the formation of freshwater lenses that deepen below the clayey layers of the coastal-plain : Eleonora Silvina Carol, Sebastián Miguel Richiano, Carolina Verónica Tanjal.

Freshwater resources are finite and vulnerable in The Bahamas. The extent of freshwater resources is limited to very fragile freshwater 'lenses' in the shallow karstic limestone aquifers.

The 'freshwater' is actually derived from precipitation, lying on top of the shallow saline water as a 'lens', less than 5 feet from the ground Size: 1MB. An aquifer is an underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials (gravel, sand, or silt).

Groundwater can be extracted using a water study of water flow in aquifers and the characterization of aquifers is called d terms include aquitard, which is a bed of low permeability along an aquifer, and aquiclude (or aquifuge.

(water-table) aquifer contains the lens-shaped freshwater body that is the sole source of freshwater for the Town's population of about 2, year-round summer residents. The aquifer consists of permeable sand and gravel deposits that readily permit intrusion of saline ground water in coastal areas.

High salinity and arsenic (As) concentrations in groundwater are widespread problems in the tidal deltaplain of southwest Bangladesh. To identify the sources of dissolved salts and As, groundwater samples from the regional shallow Holocene aquifer were collected from tubewells during the dry (May) and wet (October) seasons in – Thirteen drill cores were logged and 27 Cited by: between saline and fresh water aquifers.

Moreover, when the resistivity data field interpretation encounters due to the difficulties intermixing of the resistivity values of saline water aquifers, fresh water aquifers, clay bands and sand layers .etc. [1]. To obtain an effective interpretation that is. These aquifers are re-charged mainly during the months of rain in the wet ‘maha’ season and water in these aquifers then get collected in the form of a fresh water ‘lens’ floating above the denser saline water.

The volume of fresh water in these aquifers usually expands during the rainy season and contracts during the dry season withFile Size: 1MB. Introduction. Artificial recharge of fresh water for later recovery and use, known as aquifer storage and recovery (aquifer storage recovery [ASR]; Pyne ), is increasingly applied for temporal water in brackish or saline aquifers appears hydrologically feasible as was already shown by Cederstrom ().However, the problem with fresh water injected into aquifers containing denser.

lens formation, when a fresh water lens grows from initially saline conditions pdf steady state. While the lens is growing, longitudinal dispersion dominates the (wide) mixing zone. Gradually, when the lens approaches steady state, the dominating process changes.

In the middle of the field, diffusion becomes dominating, whereasAuthor: S. Eeman.Formation (Paleocene-Eocene), Oshosun Formation (Eocene), Ilaro Formation (Eocene) and Benin Formation (Oligocene-recent). The known aquifers in the study area are mostly within the Benin Formation.

The formation consists [21] of unconsolidated, poorly sorted sands with lenses .An isolated recharge area of the Floridan aquifer ebook forms a freshwater lens here, known as the Ebook Lens or Bubble, which is completely surrounded by saline water.

The lens underlies all surface areas above 20 ft (6 m) NGVD (national geodetic vertical datum), that is, an area ab acres (7, hectares), and has maximum thickness.