Relevant bibliographies by topics / Aquifer

Academic literature on the topic 'Aquifer'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 May 2024

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Journal articles on the topic "Aquifer"

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Salvador, N., J. P. Monteiro, R. Hugman, T. Y. Stigter, and E. Reis. "Quantifying and modelling the contribution of streams that recharge the Querença-Silves aquifer in the south of Portugal." Natural Hazards and Earth System Sciences 12, no. 11 (November 6, 2012): 3217–27. http://dx.doi.org/10.5194/nhess-12-3217-2012.

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Abstract. The water balance of the mesocenozoic aquifers of the Algarve, in the south of Portugal has traditionally been estimated considering only direct ("autogenic") recharge from rainfall occurring in the area of the aquifers. Little importance has been attributed to so-called allogenic recharge, originating from streambed infiltration from runoff generated outside the aquifers, particularly in the Palaeozoic rocks to the north where runoff is high. The Querença-Silves (QS) aquifer is the most important aquifer of the region both for irrigation and public water supply. Several important and sensitive surface/groundwater ecotones and associated groundwater dependent ecosystems exist at the springs of the natural discharge areas of the aquifer system. A numerical flow model has been in constant development over the last few years and currently is able to reproduce the aquifer's responses to estimated direct recharge and abstraction for the years 2001–2010. However, recharge calculations for the model do not take into account allogenic recharge infiltration along influent reaches of streams. The quantification of allogenic recharge may further improve the assessment of water availability and exploitation risks. In this paper an attempt is made to quantify the average annual contribution of allogenic recharge to the QS aquifer, based on monitoring data of the principal water courses that cross the aquifer system. Significant uncertainties related to surface runoff generated within the aquifer area, as well as areal recharge were identified and the consequences for the optimization of spatial distribution of transmissivity in the groundwater flow model are also addressed.
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Ducci, Daniela, and Mariangela Sellerino. "A Modified AVI Model for Groundwater Vulnerability Mapping: Case Studies in Southern Italy." Water 14, no. 2 (January 15, 2022): 248. http://dx.doi.org/10.3390/w14020248.

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Many methods for evaluating the aquifer’s vulnerability to pollution have been developed in the past four decades by using geographic information system (GIS) tools. However, even if the aquifer vulnerability concept is well defined and the methods have been constantly tested and compared, the problem of the choice of the best “standard” method remains. To meet these objectives, aquifer vulnerability maps are of crucial importance. The choice of method depends on several factors, including the scale of the project, the hydrogeological characteristics of the area, and data availability. Among the many methods, the AVI (Aquifer Vulnerability Index) method has been widely used as it considers only two physical parameters. The AVI Index represents the hydraulic resistance of an aquifer to vertical flow, as a ratio between the thickness of each sedimentary unit above the uppermost aquifer (D, length), and the estimated hydraulic conductivity (K, length/time) of each of these layers. The AVI Index has a time dimension and is divided into five classes. In order to avoid a widespread presence of the higher vulnerability classes, especially in shallow aquifers, the AVI classification has been modified using statistical methods. The study reports the application of the modified AVI method for groundwater pollution vulnerability, in three different areas of southern Italy, highlighting the limitations of the method in alluvial aquifers and the differences with other methods.
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Strehlow, K., J. H. Gottsmann, and A. C. Rust. "Poroelastic responses of confined aquifers to subsurface strain and their use for volcano monitoring." Solid Earth 6, no. 4 (November 10, 2015): 1207–29. http://dx.doi.org/10.5194/se-6-1207-2015.

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Abstract. Well water level changes associated with magmatic unrest can be interpreted as a result of pore pressure changes in the aquifer due to crustal deformation, and so could provide constraints on the subsurface processes causing this strain. We use finite element analysis to demonstrate the response of aquifers to volumetric strain induced by pressurized magma reservoirs. Two different aquifers are invoked – an unconsolidated pyroclastic deposit and a vesicular lava flow – and embedded in an impermeable crust, overlying a magma chamber. The time-dependent, fully coupled models simulate crustal deformation accompanying chamber pressurization and the resulting hydraulic head changes as well as flow through the porous aquifer, i.e. porous flow. The simulated strain leads to centimetres (pyroclastic aquifer) to metres (lava flow aquifer) of hydraulic head changes; both strain and hydraulic head change with time due to substantial porous flow in the hydrological system. Well level changes are particularly sensitive to chamber volume, shape and pressurization strength, followed by aquifer permeability and the phase of the pore fluid. The depths of chamber and aquifer, as well as the aquifer's Young's modulus also have significant influence on the hydraulic head signal. While source characteristics, the distance between chamber and aquifer and the elastic stratigraphy determine the strain field and its partitioning, flow and coupling parameters define how the aquifer responds to this strain and how signals change with time. We find that generic analytical models can fail to capture the complex pre-eruptive subsurface mechanics leading to strain-induced well level changes, due to aquifer pressure changes being sensitive to chamber shape and lithological heterogeneities. In addition, the presence of a pore fluid and its flow have a significant influence on the strain signal in the aquifer and are commonly neglected in analytical models. These findings highlight the need for numerical models for the interpretation of observed well level signals. However, simulated water table changes do indeed mirror volumetric strain, and wells are therefore a valuable addition to monitoring systems that could provide important insights into pre-eruptive dynamics.
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Gan, Yiqun, and Quanrong Wang. "Technical note: A model of chemical transport in a wellbore–aquifer system." Hydrology and Earth System Sciences 28, no. 6 (March 22, 2024): 1317–23. http://dx.doi.org/10.5194/hess-28-1317-2024.

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Abstract. Wellbore is proven to be the only effective way of delivering chemicals to a target aquifer during a tracer test or aquifer remediation. The volume of original water in the operational well is a critical parameter affecting the concentration of injected tracers or chemicals in the wellbore in the early stages. We found that the calculation of the wellbore water volume by previous numerical methods was correct when the wellbore penetrates an unconfined aquifer but incorrect when the wellbore penetrates a confined aquifer, further resulting in errors in describing the solute transport of injected chemicals in confined aquifers, such as MODFLOW/MT3DMS or FEFFLOW. Such errors caused by MODFLOW/MT3DMS and FEFFLOW increased with increasing wellbore water volume. This was because the groundwater in both the wellbore and aquifer was assumed to be confined where the water level was higher than the aquifer's top elevation and the groundwater thickness was assumed to be equal to the aquifer thickness. Actually, when the wellbore penetrated a confined aquifer, the groundwater was only confined in the aquifer, while it was unconfined in the wellbore. In this study, the solute transport model is revised based on the mass balance in a well–aquifer system, with special attention given to the wellbore water volume. The accuracy of the new model was tested against benchmark analytical solutions. The revised model could increase the accuracy of reactive transport modeling in aquifer remediation through the wellbore.
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Wu, Ming-Chang, and Ping-Cheng Hsieh. "Influence of nonuniform recharge on groundwater flow in heterogeneous aquifers." AIMS Mathematics 8, no. 12 (2023): 30120–41. http://dx.doi.org/10.3934/math.20231540.

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<abstract><p>The composition of soils in aquifers is typically not homogeneous, and soil layers may be cracked or displaced due to geological activities. This heterogeneity in soil distribution within aquifers affects groundwater flow and water level variations. In the present study, we established a two-dimensional (2D) mathematical model that considers the influence of surface recharge on groundwater flow in heterogeneous sloping aquifers. By considering temporal variations in surface recharge, slope angle and aquifer heterogeneity, the simulated results are expected to better reflect real conditions in natural aquifers. The effects of aquifer heterogeneity on groundwater flow and water levels are particularly significant in sloping aquifers. The study's findings indicate that even when the soil composition remains constant, variations in groundwater level and flow may be considerable, depending on factors such as soil alignment, slope angle of the aquifer's base layer and the direction of water flow.</p></abstract>
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Maulana, Fivry Wellda, and Arie Noor Rakhman. "Aplikasi Geofisika Terpadu Untuk Penelitian Potensi Air Tanah Aquifer Batu Pasir Di Alasombo, Indonesia." Jurnal Multidisiplin Madani 2, no. 1 (January 30, 2022): 511–24. http://dx.doi.org/10.54259/mudima.v2i1.418.

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The purpose of this study was to determine the potential of groundwater in Alasombo, Weru District, Sukoharjo Regency, Indonesia. The investigation has been carried out using geophysical methods that are integrated with surface geological data to obtain an interpretation of the hydrogeological control of the aquifer. The lithology of the aquifer is dominated by sandstone which controls its role as 2 types of aquifers, namely unconfined aquifers or free aquifers and semi-confined aquifers or semi-free aquifers. The geoelectrical section shows that the groundwater-carrying layer that functions as an aquifer is the sandstone layer in the second layer and sandstone in the base layer. As an artesian aquifer or a confined aquifer, sandstone aquifers have a water volume between 31.5 to 260 m3/day, in a northwest-southeast direction. In terms of the quality of the conductivity value of water in the field, below 1500 µs/cm is freshwater type groundwater that can be recommended as a source of clean water.
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Zhang, Yi, and Dong Ming Guo. "Temperature Field of Single-Well Aquifer Thermal Energy Storage in Sanhejian Coal Mine." Advanced Materials Research 415-417 (December 2011): 1028–31. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.1028.

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The technology of aquifer thermal energy storage(ATES) is an energy-saving technology which can provide a solution to energy shortages and resources expasion. The first key point of this technology is whether the aquifer can be use to store energy. In this paper, taking Sanhejian Coal Mine as an example, we choose Quaternary upper loose sandy porosity confined aquifer to bottom clayed glavel porosity confined aquifer as aquifers thermal energy storage, to discuss whether the aquifers can be used to store energy. The simulation results of aquifer temperature field show that the selected aquifers reach the goal of energy storage. And with the same irrigation flow, the lower the temperature, the more the cold water and the larger the low temperature region in aquifers thermal energy storage. With the same irrigation temperature, the lager the irrigation flow the more the cold water and the larger the low temperature region in aquifers thermal energy storage.
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Luo, Zhaoyang, Jun Kong, Chengji Shen, Pei Xin, Chunhui Lu, Ling Li, and David Andrew Barry. "Effects of aquifer geometry on seawater intrusion in annulus segment island aquifers." Hydrology and Earth System Sciences 25, no. 12 (December 23, 2021): 6591–602. http://dx.doi.org/10.5194/hess-25-6591-2021.

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Abstract. Seawater intrusion in island aquifers was considered analytically, specifically for annulus segment aquifers (ASAs), i.e., aquifers that (in plan) have the shape of an annulus segment. Based on the Ghijben–Herzberg and hillslope-storage Boussinesq equations, analytical solutions were derived for steady-state seawater intrusion in ASAs, with a focus on the freshwater–seawater interface and its corresponding watertable elevation. Predictions of the analytical solutions compared well with experimental data, and so they were employed to investigate the effects of aquifer geometry on seawater intrusion in island aquifers. Three different ASA geometries were compared: convergent (smaller side is facing the lagoon, larger side is the internal no-flow boundary and flow converges towards the lagoon), rectangular and divergent (smaller side is the internal no-flow boundary, larger side is facing the sea and flow diverges towards the sea). Depending on the aquifer geometry, seawater intrusion was found to vary greatly, such that the assumption of a rectangular aquifer to model an ASA can lead to poor estimates of seawater intrusion. Other factors being equal, compared with rectangular aquifers, seawater intrusion is more extensive, and watertable elevation is lower in divergent aquifers, with the opposite tendency in convergent aquifers. Sensitivity analysis further indicated that the effects of aquifer geometry on seawater intrusion and watertable elevation vary with aquifer width and distance from the circle center to the inner arc (the lagoon boundary for convergent aquifers or the internal no-flow boundary for divergent aquifers). A larger aquifer width and distance from the circle center to the inner arc weaken the effects of aquifer geometry, and hence differences in predictions for the three geometries become less pronounced.
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Tsepav, Matthew Tersoo, Aliyu Yahaya Badeggi, Obaje Nuhu George, Usman Yusuf Tanko, and Ibrahim Samuel Ibbi. "On the Use of Electrical Resistivity Method in Mapping Potential Sources and Extent of Pollution of Groundwater Systems in Lapai Town, Niger State, Nigeria." Journal of Physics: Theories and Applications 5, no. 1 (March 30, 2021): 18. http://dx.doi.org/10.20961/jphystheor-appl.v5i1.51563.

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<p>Electrical resistivity method employing the Schlumberger array was used to occupy forty four (44) vertical electrical sounding points in Lapai town with the aim of determining the depth to aquifers, aquifer thicknesses and aquifer protective capacity. The G41 Geotron resistivity meter was used in obtaining the apparent resistivity data which was processed using Interpex 1XD resistivity interpretation software. The results revealed four lithologic sections which include top lateritic soil, sandy clay, fractured basement and fresh basement. Both confined and unconfined aquifers were identified within the area, with four classes of aquifer proactive capacities as high, moderate, weak and poor. While the aquifer at VES 20 was highly protected, twenty other aquifers were moderately protected, eight others had weak protection and fifteen aquifers were poorly protected. The aquifers were generally of good thicknesses and at varying reasonable depths, making them good reservoirs of water in appreciable quantity. The average aquifer thickness was estimated to be 48.36m while the average depth to aquifers was estimated to be 56.68m.</p>
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Hera-Portillo, África de la, Julio López-Gutiérrez, Beatriz Mayor, Elena López-Gunn, Hans Jørgen Henriksen, Ryle Nørskov Gejl, Pedro Zorrilla-Miras, and Pedro Martínez-Santos. "An Initial Framework for Understanding the Resilience of Aquifers to Groundwater Pumping." Water 13, no. 4 (February 17, 2021): 519. http://dx.doi.org/10.3390/w13040519.

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Groundwater stored in aquifers experiences a wide variety of natural, induced and/or anthropogenic disturbances. Among them, groundwater extraction is the main disturbance that affects most of the aquifers in the world. Aquifer’s resilience, understood as the potential of the aquifer to sustain disturbances on the long term and to guarantee essential qualities and functions, provides a key tool when assessing sustainable groundwater management alternatives. The aim of this work is to illustrate an aquifer resilience framework that can support groundwater sustainable management. A theoretical framework is based on the identification of the key variables that parameterize the quantitative and qualitative responses of the groundwater flow system to pumping. An example from the literature based in Denmark is provided as an illustration of the proposed framework. The results show that long-term high quality data are essential to make a step further in aquifers dynamic responses. The quantitative understanding of the aquifer’s behavior before, during and after groundwater extraction provides a valuable source of information in order to identify thresholds of change (tipping points, transitions or regime shifts) which could permit pro-active groundwater management decisions. Moreover, a deeper understanding on the aquifer’s dynamics provides useful information in order to avert threats that may put the sustainability of the system at risk.
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Dissertations / Theses on the topic "Aquifer"

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Chen, Yiming. "Aquifer storage and recovery in saline aquifers." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52266.

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Aquifer storage and recovery (ASR) is a particular scheme of artificial recharge of groundwater by injecting fresh water into aquifers and subsequently recovering the stored water during times of peak demand or extended drought. In the era of combating climate change, ASR, as an effective means for water reuse and sustainable management of water resources in concert with the natural environment, represents a huge opportunity for climate change adaptation to mitigate water availability stress.The success of an ASR scheme is quantified by the recovery efficiency (RE), defined as the volume of stored water that can be recovered for supply purposes divided by the total volume injected. It is not uncommon that RE may be significantly lower than 100% because of the water quality changes as a consequence of the mixing between the injected water and native groundwater and the interaction between injected water and soil. Thus, the key of a successful ASR scheme is (1) to select appropriate aquifers and (2) to design optimal operational processes to build up a bubble of injected water with minimized negative impact from such mixing and interaction. To achieve this, this thesis develops an integrated knowledge base with sound interdisciplinary science and understanding of the mixing processes under operational ASR management in aquifers with various hydrogeological conditions. Analytical and numerical modeling are conducted to improve the scientific understanding of mixing processes involved in ASR schemes and to provide specific technical guidance for improving ASR efficiency under complex hydrogeological conditions. (1) An efficient approach is developed to analytically evaluate solute transport in a horizontal radial flow field with a multistep pumping and examine the ASR performance in homogeneous, isotropic aquifer with advective and dispersive transport processes. (2) Numerical and analytical studies are conducted to investigate the efficiency of an ASR system in dual-domain aquifers with mass transfer limitations under various hydrogeological and operational conditions. Simple and effective relationships between transport parameters and ASR operational parameters are derived to quantify the effectiveness and ascertain the potential of ASR systems with mass transfer limitations.(3) Effects of hydrogeological and operational parameters on ASR efficiency are assessed in homogeneous/stratified, isotropic/anisotropic coastal aquifers. Effects of transverse dispersion are particularly investigated in such aquifers.(4) Finally, we test and study an innovative ASR scheme for improving the RE in brackish aquifers: injection through a fully-penetrated well and recovery through a partially-penetrated well.
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Walter, Martin. "Explaining the emergence of transboundary groundwater management : the cases of Guaraní aquifer system, the Hueco and Mesilla Bolsón aquifers, and the Génévois aquifer." Paris, Institut d'études politiques, 2012. https://spire.sciencespo.fr/notice/2441/5rkqqmvrn4tl22s9mc41lidr0.

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Malgré la diversité de contributions concernant l’analyse des ressources hydriques et la multiplicité d’expériences de gestion de ces ressources, les eaux souterraines n’ont été incorporées dans l’agenda politique des relations internationales que très récemment. En ligne avec les recherches dédiées à la compréhension des défis associés à la gestion des eaux et à l’émergence des mécanismes de régulation pour la gestion environnementale, ce travail examine la création de mécanismes pour la gestion conjointe des eaux souterraines transfrontalières. Pour ce faire, il essaye de répondre une question relativement simple : quels facteurs ont été déterminants pour l’émergence et la mise en œuvre de mécanismes de gestion conjointe des eaux souterraines ? A partir d’une révision de la littérature disponible et de l’étude comparée de trois cas, cette recherche a trouvé que dans la reconnaissance et la formulation des problèmes des eaux souterraines interagissent toujours trois types de facteur : les usages de l’eau souterraine, les caractéristiques hydrogéologiques des aquifères et la valeur sociale attribuée à la disponibilité éco-systémique des ressources. Cette recherche a trouvé d’ailleurs que la simple existence de problèmes associés à la disponibilité des ressources ne pousse pas automatiquement à la création des mécanismes de gestion. Ces derniers, qui peuvent être coordonnés ou unilatéraux, découlent d’une articulation d’éléments systémiques et socio-institutionnels
Despite the diversity of the contributions to the analysis of water resources and the myriad of water management experiences, transboundary groundwaters have only relatively recently entered the international political agenda. In line with research dedicated to understanding the challenges associated with the management of water resources and the creation of environmental regulatory frameworks, this dissertation examines the emergence of mechanisms for the management of transboundary groundwater resources. In doing so, it makes a seemingly straightforward inquiry. What are the factors that trigger the emergence and implementation of groundwater management mechanisms? Drawing from the review of the literature and the comparative analysis of three cases of transboundary groundwater management, this research finds that the recognition of groundwater problems is determined by the interplay of three factors: the uses of groundwater, the features of the hydrogeological resources, and the social valuation of the eco-system services provided by the resources. In addition, it suggests that groundwater problems are not sufficient to explain the nature of the mechanisms employed for the management of the resources. It argues that management mechanisms, which may be coordinated or unilateral, result from the configuration of both systemic and socio-institutional factors
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Wendelborn, Anke. "Zinc and copper behaviour during stormwater aquifer storage and recovery in sandy aquifers." Monash University. Faculty of Engineering. Department of Civil Engineering, Institute for Sustainable Water Resources, 2008. http://arrow.monash.edu.au/hdl/1959.1/68715.

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In the light of increasing demand and diminishing supplies a sustainable urban water management for Melbourne and other cities will need to include water recycling and reuse of reclaimed water and stormwater. One key issue in stormwater reuse is the need for storage between times of collection until times of demand. Aquifer storage and recovery (ASR) would be a valuable option as it has limited space requirements and restricts loss from evaporation. However, stormwater commonly contains elevated levels of heavy metals, of which Zn and Cu are the most mobile. Stormwater also contains suspended solids, organic carbon, oxygen and nutrients, which influence the behaviour of injected metals and induce geochemical changes in the aquifer. While stormwater ASR has been practiced in limestone aquifers in South Australia, field data for sandy aquifers, which are more prevalent around Melbourne, are very limited. Risk assessment regarding the potential impact of stormwater ASR on the quality of the aquifer and groundwater resources in sandy aquifer is therefore necessary. After a characterisation of stormwater from different Melbourne catchments confirmed comparatively high concentrations of Zn and Cu in stormwater, three siliceous aquifer sediments were used in a series of batch sorption experiments as well as column experiments imitating one ASR cycle to assess the impact of different parameters on Zn and Cu behaviour. The reactive geochemical transport model PHT3D was then modified to simulate experimental results with the outlook that it could be used as a predictive tool for long term evaluation. The study showed that Zn adsorption was limited and desorption of large fractions occurred, indicating that injected amounts of Zn are mobile and would mainly be recovered. In contrast, Cu adsorption was higher and desorption was limited, indicating that injected amounts of Cu would mainly accumulate in the aquifer. The release of metals was triggered by reduction in pH, increase in ionic strength and particle mobilisation. Metal concentrations were also increased after storage phases, while minor sediment constituents, especially organic matter, significantly reduce metal mobility. The different role of dissolved and solid organic carbon is critical in understanding Cu behaviour during stormwater ASR. Pretreatment of stormwater to reduce the injection of colloids, organic carbon and metals are recommended to limit metal accumulation in the subsurface. Monitoring of water quality throughout the ASR cycle would be encouraged to validate the current findings with field data. Special attention should be paid to backflushed water quality to ensure correct disposal.
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Pindoria-Nandha, Mital. "Planning an aquifer storage and recovery scheme in the Sherwood Sandstone aquifer." Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/11313.

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Aquifer Storage and Recovery (ASR) involves the injection of water into an aquifer for subsequent recovery from the same well. Whilst ASR provides a competitive alternative to reservoir storage, a lack of precedence of successful schemes and uncertainties with respect to regulatory requirements, and abstracted water quality and quantity have limited its implementation in the UK. The ambition of this research is to improve understanding of these impediments with particular reference to the Sherwood Sandstone aquifer. Drawing on existing project review and risk management approaches, a decision support tool to help scheme designers scope ASR scheme potential and challenges was developed and tested. The tool provides practitioners with a systematic method for early stage evaluation of ASR schemes with testing confirming broad value and alignment with business processes. Limitations on the recovery of recharged water was investigated through a critical literature review on clogging with geochemical, biological, physical and gaseous binding processes identified as the most likely mechanisms to impact an ASR scheme in this aquifer. Water quality changes during storage and the impact of storage period on recovered water quality were investigated in the laboratory using ASR simulating columns, with storage times of 15, 20, 30 and 60 days. Water quality improvements such as biodegradation of disinfection by-products, denitrification and sulphate reduction were observed. However recovered water quality deteriorated with respect to iron, arsenic, manganese, total organic carbon and nickel. These results, together with the review of regulations conducted as part of decision support tool development, suggest that the current interpretation of the Water Framework Directive requirements is overly restrictive and is deterring wider implementation of ASR in the UK. Conclusions focus on the need for a more appropriate approach to regulating ASR schemes, in particular, one which adopts a risk based approach to determining water quality standards.
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Heckel, Kyle Christopher. "PETROLEUM CONTAMINATED AQUIFER REMEDIATION." Thesis, The University of Arizona, 2009. http://hdl.handle.net/10150/192479.

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Williams, David G. "Whole aquifer system management: the northeast floridan aquifer system under an interstate compact." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/30907.

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Wright, Timothy Edwin James. "Predicting the applicability of aquifer storage recovery (ASR) in the UK chalk aquifer." Thesis, University College London (University of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405796.

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Sun, Dongmin. "Aquitard control of stream-aquifer interaction and flow to a horizontal well in coastal aquifers." Diss., Texas A&M University, 2005. http://hdl.handle.net/1969.1/4740.

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This dissertation is composed of three parts of major contributions: In Chapter II, we developed a new conceptual model and derived a new semi-analytical model for flow to a horizontal well beneath a water reservoir. Instead of treating the leakage from aquitard as a source term inside the aquifer which is called Hantush’s assumption (1964), we linked flows in aquitard and aquifer by the idea of continuity of flux and drawdown. The result in this chapter is compared with that of Zhan and Park in 2003 which Hantush’s assumption is adopted at various hydraulic and well configurations. It shows that Hantush’s assumption becomes inaccurate in regions where vertical velocity components are significant. In Chapter III, we deal with the interaction of an aquifer with two parallel surface water bodies such as two streams or canals. In this chapter, new closed-form analytical and semi-analytical solutions are acquired for the pumping induced dynamic interaction between two streams and ground water for two different cases. In the first case, the sediment layers separating the streams from the aquifer ground water do not exist. In the second case, the two low permeable layers are considered. The effect of aquitard and water right competition is addressed in this chapter. This model can be used for interpreting and deriving hydrologic parameters of aquitard and aquifer when pumping occurs between two channels. It can also be used to predict stream depletion which is essential for water management and ecology conservation. In Chapter IV, we investigated the three dimensional upconing due to a finite-length of horizontal well and its critical conditions. The results are compared with those of vertical wells. The critical condition which includes the critical rise and the critical time at a certain pumping rate depends on the well length, the initial interface location, the well location, and the pumping rate. Our results show that horizontal well might be a better tool for coastal groundwater resources development. In real field applications, installing long wells as shallow as possible is always desirable for sustaining long periods of pumping with significant rates.
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Khater, A. M. R. "Management of stream-aquifer systems." Thesis, University of Southampton, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380176.

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Elobaid, Elnaiem Ali. "Aquifer investigations in north Qatar." Thesis, University of Bedfordshire, 2000. http://hdl.handle.net/10547/606074.

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The purpose of this study was to investigate the levels and quality of groundwater in a farming area to the north of Doha, the capital of the State of Qatar. Two rows of about five wells were selected, the lines being more or less parallel to each other, about 30 km apart, running for 45 km inland from the east coast. Vertical electrical sounding surveys were undertaken and groundwater samples were taken from these wells in winter and in summer. The water was chemically analysed, and the results formed the basis for a hydrogeochemical modelling exercise. The results of the geophysical and geochemical surveys indicate that there is a seasonal vertical and lateral migration of the fresh water/salt water interface in winter before the rainfall replenishes the groundwater aquifers. The geochemistry of the groundwater indicate that there is a gradual decrease of cations and anions, particularly Na+, cr, S04, and HC03-, together with a decrease in conductivity CEC), total dissolved solids (TDS) and sodium absorption ratio (SAR) from the coast inland. There is an upconing which brings the saline water to the surface near the middle of the southern profile in both seasons. In both profiles the fresh water/salt water interface migrates inland due to the excessive extraction of fresh water from the wells.
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Books on the topic "Aquifer"

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Cook, Marlon R. The Eutaw aquifer in Alabama. Tuscaloosa, Ala. (420 Hackberry Lane, Tuscaloosa 35486-9780): Geological Survey of Alabama, Hydrogeology Division, 1993.

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2

Clark, Allan K. Geologic framework of the Edwards aquifer and upper confining unit, and hydrogeologic characteristics of the Edwards aquifer, south-central Uvalde County, Texas. Austin, Tex: U.S. Geological Survey, 1997.

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Clark, Allan K. Geologic framework of the Edwards aquifer and upper confining unit, and hydrogeologic characteristics of the Edwards aquifer, south-central Uvalde County, Texas. Austin, Tex: U.S. Geological Survey, 1997.

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Clark, Allan K. Geologic framework of the Edwards aquifer and upper confining unit, and hydrogeologic characteristics of the Edwards aquifer, south-central Uvalde County, Texas. Austin, Tex. (8011 Cameron Rd., Austin 78754-3898): U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Berg, Richard C. Aquifer sensitivity classification for Illinois using depth to uppermost aquifer material and aquifer thickness. Champaign, Ill: Illinois State Geological Survey, 2001.

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Johnston, Richard H. Summary of the hydrology of the Floridan aquifer system in Florida and in parts of Georgia, South Carolina, and Alabama. Washington, D.C: U.S. G.P.O., 1988.

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Johnston, Richard H. Summary of the hydrology of the Floridan aquifer system in Florida and in parts of Georgia, South Carolina, and Alabama. Washington, DC: U.S. Dept. of the Interior, 1988.

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Maliva, Robert G. Aquifer Characterization Techniques. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-32137-0.

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Maliva, Robert G. Anthropogenic Aquifer Recharge. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-11084-0.

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Sindalovskiy, Leonid N. Aquifer Test Solutions. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-43409-4.

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Book chapters on the topic "Aquifer"

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Guerra, Maurizio. "Aquifer." In Encyclopedia of Earth Sciences Series, 1–3. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-12127-7_17-1.

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Hangay, George, Severiano F. Gayubo, Marjorie A. Hoy, Marta Goula, Allen Sanborn, Wendell L. Morrill, Gerd GÄde, et al. "Aquifer." In Encyclopedia of Entomology, 264. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_10323.

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Guerra, Maurizio. "Aquifer." In Encyclopedia of Earth Sciences Series, 25–27. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73568-9_17.

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Sethi, Rajandrea, and Antonio Di Molfetta. "Aquifer Characterization." In Groundwater Engineering, 55–112. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20516-4_4.

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Airo, Alessandro. "Aquifer (Mars)." In Encyclopedia of Astrobiology, 117–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_3243.

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Alsharhan, Abdulrahman S., and Zeinelabidin E. Rizk. "Ophiolite Aquifer." In Water Resources and Integrated Management of the United Arab Emirates, 311–33. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-31684-6_10.

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Akhtar, Naseem, Muhammad Izzuddin Syakir, Mohd Talha Anees, Abdul Qadir, and Mohamad Shaiful Yusuff. "Characteristics and Assessment of Groundwater." In Groundwater [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.93800.

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Groundwater system is very vital to humanity and the ecosystem. Aquifers are determined based on the absence or presence of water table positioning, that is, confined, unconfined, leaky aquifers and fractured aquifers. The objective of this chapter is to discuss the characteristic and assessment of groundwater within the scope of vertical distribution of GW, types of the aquifer system, types of SW-GW interface, and SW-GW interaction at both local and regional scales. The properties of the aquifer depend on the physical characteristics of the materials (porosity, permeability, specific yield, specific storage, and hydraulic conductivities) which are determined by techniques like resistivity surveys and pumping tests followed by remote sensing and geographic information system for better information on the groundwater system. Furthermore, understanding the SW-GW interactions through available methods (seepage meter, heat tracer, and environmental tracer) is useful in watershed management, that is, risk management and assessment of the aquifer system.
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Alley, William M., and Rosemarie Alley. "Transboundary Aquifers." In High and Dry. Yale University Press, 2017. http://dx.doi.org/10.12987/yale/9780300220384.003.0016.

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The difficulties of determining who has the right to use groundwater and how much they can pump becomes even more complicated for aquifers that cross international boundaries. The chapter discusses the few countries that have made progress in addressing transboundary aquifer issues. The chapter also provides a brief history of the Transboundary Aquifer Assessment Program along the U.S.-Mexico border to illustrate key concepts and challenges.
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Alley, William M., and Rosemarie Alley. "Not All Aquifers Are Created Equal." In High and Dry. Yale University Press, 2017. http://dx.doi.org/10.12987/yale/9780300220384.003.0005.

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This chapter examines how geology and climate create vastly different groundwater situations. Effective management of groundwater depends upon full consideration of these differences. The chapter begins with a distinction between confined and unconfined aquifers and a look at artesian wells, with a focus on Australia’s Great Artesian Basin. The characteristics of different rock types are illustrated by four basic aquifer rock types in sub-Saharan Africa. The chapter then turns to non-renewable aquifers in North Africa and Saudi Arabia. The fast-recharging Edwards Aquifer in Texas then provides a quite different story with its sensitivity to short-term climate variability and concerns about endangered species. The chapter concludes with a discussion of saltwater intrusion in coastal aquifers and the potential of brackish groundwater for water supply.
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Jain, Prabhat, Abhay Soni, and Rahul Shende. "Management of Hard Rock Basaltic Aquifer through Aquifer Mapping: A Case Study of Nashik District, Maharashtra, India." In Environmental Sciences. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.111644.

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In the Maharashtra State of India, Deccan Trap basaltic lava flows are spread over around 82% of the area and form the most prominent aquifer in the entire state. Nasik district occurring in the northern part of Maharashtra also known as Khandesh represents a typical area of Deccan Trap basalt. The storage and transmission capabilities of the basaltic lava flow aquifer are very limited due to the inherent absence of primary pore spaces. These basaltic rocks act as aquifers only when they are weathered, jointed or fractured, thus giving rise to secondary porosity and permeability. Due to wide variations in secondary openings, the potential areas for groundwater are generally localized. In this way, Deccan Trap basalt possesses a unique challenge to aquifer mapping, both spatially and vertically due to its hydrogeological heterogeneity. In the current study, this challenge of aquifer mapping and management in basalt was tackled through a multidisciplinary, multipronged approach involving data integration of various thematic layers viz., geomorphology, soil, drainage, land use-land cover, hydrometeorology, and geophysical techniques etc., as indirect tools and combining it with direct tools such as drilling, well inventory, water level monitoring, groundwater quality checks, and aquifer pumping tests for obtaining reliable results. By following the above methodology, the 3-D aquifer geometry, lithological sections, fence diagrams, aquifer characteristics, yield potentials, and aquifer-wise resources were deciphered. The results showed that the area has two aquifer systems comprising of Aquifer-I, that is. shallow aquifer, which is generally tapped by the dug wells of 8 to 32 m depth with water levels of 1.2 to 15 meters below ground level (m bgl) and yield varies from 10 to 100 m3/day. Whereas, the Aquifer-II, that is, deeper aquifer is being tapped by bore wells with a depth ranging from 30 to 200 m bgl and a water level from 8 to 55 m bgl. However, their pumping sustainability was limited to 0.5 to 3 hours due to low storage potential resulting in overexploitation. The given aquifer maps indicate that major parts of the area have limited yield (Aquifer-I: between the depth of 10 m - 15 m bgl and Aquifer-II: between the depth of 80 m −140 m bgl). In hard rock areas, especially basaltic aquifers due to their low storage potential, groundwater development is always a challenging task unless it is combined with the management of the resources. Considering the issues plaguing the area, the aquifer management plan encompassing supply and demand-side interventions, and groundwater development has been devised. It is concluded that 139.30 MCM of groundwater resources can be augmented by artificial recharge under supply-side interventions. Whereas the groundwater demand for irrigation can also be reduced by 272 MCM by adopting drip irrigation in 117 sq. km. of sugarcane and 790 sq. km. of onion cultivated areas under the demand-side interventions. The implementation of these measures will minimize the stress on groundwater by bringing down the stage of groundwater development from 88–55% (safe category) in six water-stressed blocks/taluka, whereas the overall stage of groundwater development will be reduced from 58.45% to 40.70%. Thus, the adoption of both supply-side and demand-side interventions interlinked with water budgeting through community participation will provide long-term solutions to combat the overexploitation, water level decline, low storage potential, recurring droughts and other issues of the area and also help in improving socioeconomic conditions of the area.
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Conference papers on the topic "Aquifer"

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Wang, Bo, Xiangzeng Wang, Yiming Chen, Quansheng Liang, and Fanhua Zeng. "A Review-Dissolution and Mineralization Storage of CO2 Geological Storage in Saline Aquifers." In SPE Canadian Energy Technology Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/212790-ms.

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Abstract Saline aquifer has become the preferred storage location of carbon capture, and storage (CCS) technology because of its wide distribution, large storage capacity and high safety factor. According to IPCC statistics, the storage capacity of saline aquifers worldwide is 400 – 10000 Gt, which is dozens of times that of oil and gas reservoirs and hundreds of times that of coal seams. Therefore, the carbon storage in saline aquifer has the most potential for CO2 storage. Carbon sequestration in saline aquifers includes four trapping mechanisms: short-term geological and hydrodynamic capture and long-term geochemical (solubility and mineral) capture. Moreover, the solubility of CO2 in saline aquifer and the mechanism of mineral capture (salt precipitation) depends on the injected CO2 and the water-rock characteristics of saline aquifer. However, current knowledge on geochemical capture is still at an early stage compared to other capture theories. Recent researches indicate that although temperature, pressure, salinity of formation water and mineral composition of formation rocks are important factors affecting mineral storage, other reservoir parameters, such as reservoir thickness, dip angle, anisotropy, and bedding distribution, may also significantly affect salt precipitation, mineral storage, and geo-chemical storage. In this paper, we would like to present a comprehensive review on the solubility model of CO2 in saline aquifers, the phase permeability change of CO2 and saline aquifers, the mechanism of CO2-water -rock interaction, the dissolution and precipitation model of inorganic salt minerals, and the influencing factors for CO2 sequestration in saline aquifers. We believe that this review lays a foundation for future study of carbon storage technology in saline aquifer.
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Grutters, Mark, Saloua Tiar, Avnish Kumar Mathur, Jawaher Mohamed AlDhanhani, Noora Aadel Mohammed Alblooshi, Weiliang Liu, Zhengzhong Li, and Feng Zhai. "Unlocking Oil Production Through Debottlenecking Water Facilities by Implementation of a Novel PWRI Solution." In ADIPEC. SPE, 2023. http://dx.doi.org/10.2118/216345-ms.

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Abstract An onshore oilfield producing 260 MBD from carbonate reservoirs has been facing production constraints, due to increasing water cut and produced water (PW) disposal limitations caused by surface flow line integrity issues. Traditionally, PW is disposed in water aquifers without treatment other than water settling tanks. Aquifer water is used for reservoir pressure maintenance. To reduce the water disposal volumes and hence debottleneck oil production, and to limit the intake of water from environmentally sensitive aquifers it was evaluated if PW could replace aquifer water for injection. A comprehensive laboratory study, with water analysis and core flooding demonstrated that PW alone, without treatment, is likely to cause significant formation damage. However, additional modeling indicated that PW reinjection (PWRI) was feasible if mixed with aquifer water without the need for further treatment. It was estimated that 35% PW could be mixed with 65% aquifer water for matrix injection in tight reservoirs (&lt;10 md). The risk for inorganic scale formation due to water incompatibility and the risk for corrosion or pitting was assessed to be low. After a facility engineering study it was decided to expedite routing of PW to the injection water manifold via a temporary flexible line. A surveillance program was put in place to monitor the water quality and injection well performance. PW reinjection has been implemented without any recorded instances of increased injection pressure since the start. This ‘reversed engineering’ approach, in which critical oil-in-water (OIW) and total suspended solids (TSS) specifications were first established for different reservoirs, followed by modelling of mixing scenarios that meet these specifications, resulted in a successful PW/aquifer mixing pilot project. The increased produced water handling capacity has unlocked 3,000 t0 5,000 BOPD, resulted in further cost reductions by eliminating drilling of disposal wells and contributed to the overall goals of eliminating water intake from vulnerable aquifers.
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Mukhtar, Muhammad Haseeb, Dimitrios Georgios Hatzignatiou, and Christine Ehlig-Economides. "Extended Aquifer System Pressure Behavior Under Carbon Storage." In SPE Annual Technical Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/214868-ms.

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Abstract Most reported carbon storage projects have involved inexpensive CO2 capture from gas processing plants or ethanol refineries. However, widespread carbon capture and storage application must avoid any risk that high capital investment cost for carbon capture from stationary point sources leads to unanticipated issues related to the aquifer storage. This paper reviews successful and unsuccessful carbon storage projects and explains simple extended aquifer system fundamentals that must be considered in selecting a storage aquifer. This study begins by evaluating reported carbon storage projects in the context of an extended aquifer system with specific attention to initial formation pore pressure and potential or known hydraulic vertical or lateral communication with hydrocarbon accumulations and/or fresh water. Further study focusses on how the contrast between injection well and aquifer pressure evolution enables understanding of the overall aquifer material balance. Finally, we consider implications of brine migration during and after long term CO2 injection in unconfined aquifers. Experience in the petroleum industry with aquifer behavior include presence or lack of water influx and production from hydrocarbon reservoirs that share a common aquifer. Of particular importance is the observation that hydrostatic initial formation pressure indicates the possibility that a petroleum system, or an extended aquifer system without hydrocarbon accumulation(s), connects to atmospheric pressure through an unconfined aquifer. In such cases indefinite injection will never increase the regional aquifer pressure. Further, initial formation pressure that exceeds hydrostatic pressure implies a petroleum system or an extended aquifer system that is volumetrically limited. In such cases injection will increase the system pressure, and pressure monitoring can detect leakage from the system. Finally, CO2 injection into an aquifer will displace brine in the direction of lower pressure that could relate to distant production from the same aquifer or from hydrocarbon reservoirs with which it communicates. Reasons for known carbon storage project interruptions have included unexpected lateral plume migration or aquifer pressure increase during CO2 injection that might have been anticipated with attention to straightforward consideration of aquifer enabled hydraulic communication. Such extended aquifer dynamics must be included in long term models for permanent CO2 storage during and after injection.
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Fomin, Sergei, Vladimir Chugunov, and Toshiyuki Hashida. "Application of Fractional Derivatives for Simulating Diffusion Into Porous Matrix in Mathematical Modeling of the Contaminant Transport in a Confined Fractured Porous Aquifer." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-16138.

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Solute transport in the fractured porous confined aquifer is modeled by the advection-dispersion equation with fractional time derivative of order γ, which may vary from 0 to 1. Accounting for diffusion in the surrounding rock mass leads to the introduction of an additional fractional time derivative of order 1/2 in the equation for solute transport. The closed-form solutions for concentrations in the aquifer and surrounding rocks are obtained for the arbitrary time-dependent source of contamination located in the inlet of the aquifer. Based on these solutions, different regimes of contamination of the aquifers with different physical properties are modeled and analyzed.
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Bahadori, Mehdi N., and Farhad Behafarid. "Cooling of Gas Turbines Inlet Air Through Aquifer Thermal Energy Storage." In ASME 2006 Power Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/power2006-88126.

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The power output of gas turbines reduces greatly with the increase of inlet air temperature. Aquifer thermal energy storage (ATES) is employed for cooling of the inlet air of a gas turbine. Water from a confined aquifer is cooled in winter, and is injected back into the aquifer. The stored chilled water is withdrawn in summer to cool the gas turbine inlet air. The heated water is then injected back into the aquifer. A 20 MW Hitachi gas turbine, along with a two-well aquifer were considered for analysis. It was shown that the minimum power output of the gas turbine on the warmest day of the year could be raised from 16.30 to 20.05 MW, and the mean annual power output could be increased from 19.1 to 20.1 MW, and the efficiency from 32.52% to 34.54% on the warmest day of the year and the mean annual efficiency from 33.88% to 34.52%. The use of ATES is a viable option for the increase of gas turbines power output, provided that suitable confined aquifers are available at their sites.
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Martinez, Vladimir, Erdal Ozkan, and Heber Cinco Ley. "Interference Analysis in Reservoirs with Bottom-Water Drive During Water Injection Processes Through Subsurface Connectivity." In SPE Improved Oil Recovery Conference. SPE, 2022. http://dx.doi.org/10.2118/209376-ms.

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Abstract This work analyzes the feasibility of implementing water injection processes through subsurface connectivity between different formations through communicating wells, allowing the water to flow from a source aquifer to a depleted formation. It presents a 3-dimensional semi-analytical model for estimating water influx in reservoirs with bottom-water drive and analyzing interference between reservoirs when subsurface connectivity is carried out to supply energy from an aquifer. It applies to both finite and infinite aquifers and reservoirs sharing an aquifer. The general solution is obtained by solving the diffusion equation employing Laplace and Fourier cosine transforms and is presented in Laplace space, requiring a numerical inversion method to convert the results to the real space. The functionality of the analytical solution is evaluated with reservoir numerical simulation and communicating well models. Results show that implementing this solution brings notable advantages because the ultimate oil recovery factor improves considerably. Additionally, it delays the water encroachment in reservoirs adjoined to the source aquifer and reduces water production.
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Ahmed, Ahmed Hassan, Manish Srivastava, Ahmed Al Hosani, and Mohamed Saleh Ali. "Protecting Shallow Aquifer During Entire Well Lifecycle Through Integral Formations Isolation." In SPE Water Lifecycle Management Conference and Exhibition. SPE, 2024. http://dx.doi.org/10.2118/218954-ms.

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Abstract Restoration of the cap rock to ensure lateral isolation as barrier is crucial to avoid any contamination of shallow aquifer(s). As per federal Law shallow aquifer shall be protected from hydrocarbon and water bearing formations during entire well life cycle. Attention should be paid to the sub-surface barriers starting from design of a new well till the phase of permanently plugged and abandoned (P&A) where the intention of never being re-use or re-enter the well. Keeping in mind the risk of contamination of aquifers a detailed requirement has been established to ensure the isolation between water or hydrocarbon formation(s) and shallow aquifer(s) during design and construction phases by achieving integral annulus cement. During the operation phase the barriers are monitored and validated, in case of abnormality diagnostics are performed to mitigate the risk. At the end of well life cycle, it must be permanently P&Aed. A documented process has been implemented with enough, type and position of well barriers to prevent undesired hydrocarbon flow from reservoir to the aquifer or to surface. A robust well integrity management system has enabled the delivery of high quality of wells. This includes proper monitoring and verification of barriers during the well construction process. This has ensured protecting shallow aquifer from any source of inflow thereby complying to the local regulations that requested to first detect source of inflow, hydrocarbon formation that shall be protected. at the time of P&A the sealing formation in between them shall have a good cement in addition to that wellbore shall be plugged with a material that provide sealing, bonding and durability as the well will not be reentered. The process ensures capturing information for the well, right from the construction stage, any changes happened during the well intervention and till the P&A stage. During the operations stage the barriers are monitored and tested to ensure that they are performing as required. Implementing the robust process has ensured that the contamination of the shallow aquifers is minimized and ensured no loss of valuable hydrocarbon to these aquifers. The process flow has been based to ensure compliance with the local Federal law and build on the international practices with inputs from local condition and lesson learnt. The process also has inputs from the concession holders to make the process cost effective and robust.
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Ferreira, J., M. C. Cunha, J. Vieira, and J. P. Monteiro. "Optimized exploitation of aquifers: application to the Querença-Silves aquifer system." In WATER RESOURCES MANAGEMENT 2009. Southampton, UK: WIT Press, 2009. http://dx.doi.org/10.2495/wrm090011.

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Pearce, J. K., H. Hofmann, K. Baublys, S. D. Golding, K. Fifield, S. J. Herbert, Z. Bhebhe, I. Matthews, A. Moser, and P. Hayes. "Methods for Differentiating Methane and Carbon Dioxide Sources in Aquifers Overlying Gas Reservoirs or Associated with CO2 Storage Sites." In Asia Pacific Unconventional Resources Symposium. SPE, 2023. http://dx.doi.org/10.2118/217301-ms.

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Abstract Understanding the sources of gases, including methane and carbon dioxide, and their concentrations and isotopic signatures in aquifer groundwater is important in regions where gas, coal or oil are extracted. It is also important where CO2 or other gases are stored or planned to be stored geologically. Methane and CO2 can exist naturally in an aquifer, for example when generated by microbial processes. Aquifer groundwater is often extracted by a variety of overlapping users for agriculture, stock, town and domestic water supply as well as by industries including mines and energy. Water bores drilled into these aquifers can be gassy or may become gassy over time, and gas shows can occur in shallow groundwater, soils, or rivers. Where these are overlying or adjacent to mines, gas and oil extraction or storage reservoirs it poses questions as to the source of gases and may raise queries about leakage. We show several examples where we have sampled gas and waters from Great Artesian Basin aquifers that overly coal seam gas (CSG) reservoirs. In addition, we regionally sampled deep bores in a proposed CO2 storage reservoir, and the surrounding and overlying aquifers. We used a combination of stable isotopes of gases and waters, major and minor ions, strontium isotopes, 36Cl, 14C, and other tracers to understand gas sources and inter aquifer connectivity. In the majority of cases the data support a lack of "leakage" with gases from natural in situ processes. The methods and tools described here can help distinguish sources of gases, and avoid environmental and social licence issues while protecting water resources. They are also applicable to understand sites and potential, real or claimed leakage from shale gas and oil reservoirs, or from other gas storage sites such as for H2, compressed air, or methane.
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Liu, Hui-Hai, Yanhui Han, Khalid M. AlRuwaili, and Murtadha J. AlTammar. "An Analytical Solution to Pressure Build-Up for CO2 Injection into a Saline Aquifer: The Impact of Stress-Dependency of Permeability." In International Petroleum Technology Conference. IPTC, 2024. http://dx.doi.org/10.2523/iptc-23869-ea.

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Abstract Aquifer pressure build-up caused by CO2 injection has been an important issue for evaluating the safety of CO2 geological sequestration in saline aquifers. Although several analytical solutions to aquifer pressure evolution have been developed, an important factor, the stress dependency of the permeability, has been ignored in them. This study develops a new analytical solution by incorporating the dependency based on the commonly used quasi steady-state flow approximation. Following some previous studies, CO2 plume evolution is calculated from a principle that for a given CO2 injection rate, the plume evolves in such a way that the injection pressure at the injection well is in its minimum. The stress-dependent permeability is expressed with the two-part Hook's model. The analytical solution gives the thickness of CO2 plume and aquifer pressure as functions of time and location. It also provides bottom hole pressure of injection well as a function of time for a given CO2 injection rate. The impact of stress-dependency of permeability depends on several factors, including the aquifer stress sensitivity and pore pressure changes during the CO2 injection. The dependency generally reduces the pressure build-up for a given injection rate because the increase in pore pressure enhances aquifer permeability.
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Reports on the topic "Aquifer"

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Fan, Mingyuan. Managed Aquifer Recharge in Mongolia: Policy Recommendations and Lessons Learned from Pilot Applications. Asian Development Bank, October 2023. http://dx.doi.org/10.22617/brf230405-2.

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This brief shares lessons from pilot projects to replenish Mongolia’s aquifers to help offset rising demand for water as climate change threatens to worsen shortages. It notes that Mongolia relies on groundwater for 90% of its water supplies and assesses three managed aquifer recharge (MAR) projects. These rely either on injection wells, surface water spreading, or enhancing natural recharge processes. It recommends Mongolia continues researching managed aquifer recharge, and shows how technical, institutional, and financial support could help harness MAR’s potential to provide vital solutions for water-scarce areas.
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Hanson, A. E. H., and J. I. LaFave. Manganese concentrations in Montana's groundwater. Montana Bureau of Mines and Geology, August 2022. http://dx.doi.org/10.59691/aauy5468.

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This report describes the overall Mn concentrations in Montana’s principal aquifers. Statistical relationships between Mn and other aquifer variables are also discussed. An excel file with the dataset is provided as an appendix.
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Carter, T. R., C. E. Logan, J K Clark, H. A. J. Russell, E. H. Priebe, and S. Sun. A three-dimensional bedrock hydrostratigraphic model of southern Ontario. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/331098.

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A hydrostratigraphic framework has been developed for southern Ontario consisting of 15 hydrostratigraphic units and 3 regional hydrochemical regimes. Using this framework, the 54 layer 3-D lithostratigraphic model has been converted into a 15 layer 3-D hydrostratigraphic model. Layers are expressed as either aquifer or aquitard based principally on hydrogeologic characteristics, in particular the permeability and the occurrence/absence of groundwater when intersected by a water well or petroleum well. Hydrostratigraphic aquifer units are sub-divided into up to three distinct hydrochemical regimes: brines (deep), brackish-saline sulphur water (intermediate), and fresh (shallow). The hydrostratigraphic unit assignment provides a standard nomenclature and definition for regional flow modelling of potable water and deeper fluids. Included in the model are: 1) 3-D hydrostratigraphic units, 2) 3-D hydrochemical fluid zones within aquifers, 3) 3-D representations of oil and natural gas reservoirs which form an integral part of the intermediate to deep groundwater regimes, 4) 3-D fluid level surfaces for deep Cambrian brines, for brines and fresh to sulphurous groundwater in the Guelph Aquifer, and the fresh to sulphurous groundwater of the Bass Islands Aquifer and Lucas-Dundee Aquifer, 5) inferred shallow karst, 6) base of fresh water, 7) Lockport Group TDS, and 8) the 3-D lithostratigraphy. The 3-D hydrostratigraphic model is derived from the lithostratigraphic layers of the published 3-D geological model. It is constructed using Leapfrog Works at 400 m grid scale and is distributed in a proprietary format with free viewer software as well as industry standard formats.
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Gannon, J. M., Jason A. Vogelgesang, and Deborah J. Quade. Aquifer Characterization and Drought Assessment Rock River Alluvial Aquifer. Iowa City: Iowa Department of Natural Resources, February 2014. http://dx.doi.org/10.17077/rep.006516.

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Gannon, J. Michael. Aquifer Characterization and Drought Assessment Floyd River Alluvial Aquifer. Iowa City: Iowa Department of Natural Resources, September 2012. http://dx.doi.org/10.17077/rep.006507.

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Vogelgesang, Jason A., and J. Michael Gannon. Aquifer Characterization and Drought Assessment Ocheyedan River Alluvial Aquifer. Iowa City: Iowa Geological Survey, The University of Iowa, January 2014. http://dx.doi.org/10.17077/rep.006465.

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Reiten, J., and K. Chandler. Hydrogeology and irrigation potential of the West Crane aquifer, Richland County, Montana. Montana Bureau of Mines and Geology, May 2023. http://dx.doi.org/10.59691/akzs9766.

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The West Crane aquifer is contained in a buried valley incised into the Fort Union bedrock. This publication describes the location, extent, groundwater flow, recharge, discharge, hydraulic properties, and water quality of the West Crane aquifer. Demand for developing this aquifer for irrigation is growing and a groundwater model is being developed to evaluate aquifer sustainability.
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Bobst, A., J. Rose, and J. Berglund. An evaluation of the unconsolidated hydrogeologic units in the south-central Flathead Valley, Montana. Montana Bureau of Mines and Geology, December 2022. http://dx.doi.org/10.59691/srlk8303.

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An evaluation of the work that has been done at the BFF site. Stratigraphy (including downhole geophysics) from a 1600 ft well drilled in 2021 into the tertiary sediments underlying the deep aquifer. Water-quality results from wells in the tertiary, deep aquifer, confining layer, and shallow aquifer. Aquifer tests and hydrograph analysis of the shallow aquifer, confining layer, deep aquifer, and tertiary sediments. Evaluation of using TEM and MT surficial geophysical techniques.
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9

Benoit, N., and D. Paradis. Aquifer system description. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2016. http://dx.doi.org/10.4095/298891.

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10

Gilchrist, A. Aquifer vulnerability: DRASTIC. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2016. http://dx.doi.org/10.4095/298892.

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