Relevant bibliographies by topics / Coastal aquifers

Academic literature on the topic 'Coastal aquifers'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 March 2023

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Journal articles on the topic "Coastal aquifers"

1

SINGH, Somvir, Param K. GAUTAM, Prashant KUMAR, Arkoprovo BISWAS, and Tandrila SARKAR. "Delineating the characteristics of saline water intrusion in the coastal aquifers of Tamil Nadu, India by analysing the Dar-Zarrouk parameters." Contributions to Geophysics and Geodesy 51, no. 2 (June 29, 2021): 141–63. http://dx.doi.org/10.31577/congeo.2021.51.2.3.

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Tuticorin, located in the southeastern part of Tamil Nadu, is a coastal aquifer on which Vertical Electrical Sounding (VES) was conducted, thereby analysing the interpreted subsurface resistivity layer parameters covering around 112 km2 area of the study region. VES is an essential tool for investigating hard rock terrains of coastal aquifers and perceive an idea about the groundwater quality. In this study, Dar-Zarrouk (D-Z) parameters like longitudinal conductance (Sc), transverse resistance (Tr) and anisotropy (λ) are analysed as these are well-established parameters in delineating the occurrence and distribution of both fresh and saline water aquifers. These parameters are also very persuasive in investigating complex subsurface parameters (resistivity and conductivity) within saline water intruded coastal region environment. After conducting a thorough survey, the resistivity results reflect that the sediments are enriched with saltwater, clay with moderate freshwater and freshwater-bearing formations. The analysis shows that the D-Z parameters offer a helpful and assured answer in demarcating the saline, moderate fresh, and freshwater aquifers. Therefore, the behaviour and patterns of the D-Z parameters in space established the existence of saline water and freshwater aquifer structures in the coastal aquifers over a vast area.
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2

Mazi, K., A. D. Koussis, and G. Destouni. "Intensively exploited Mediterranean aquifers: resilience to seawater intrusion and proximity to critical thresholds." Hydrology and Earth System Sciences 18, no. 5 (May 8, 2014): 1663–77. http://dx.doi.org/10.5194/hess-18-1663-2014.

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Abstract. We investigate seawater intrusion in three prominent Mediterranean aquifers that are subject to intensive exploitation and modified hydrologic regimes by human activities: the Nile Delta, Israel Coastal and Cyprus Akrotiri aquifers. Using a generalized analytical sharp interface model, we review the salinization history and current status of these aquifers, and quantify their resilience/vulnerability to current and future seawater intrusion forcings. We identify two different critical limits of seawater intrusion under groundwater exploitation and/or climatic stress: a limit of well intrusion, at which intruded seawater reaches key locations of groundwater pumping, and a tipping point of complete seawater intrusion up to the prevailing groundwater divide of a coastal aquifer. Either limit can be reached, and ultimately crossed, under intensive aquifer exploitation and/or climate-driven change. We show that seawater intrusion vulnerability for different aquifer cases can be directly compared in terms of normalized intrusion performance curves. The site-specific assessments show that (a) the intruding seawater currently seriously threatens the Nile Delta aquifer, (b) in the Israel Coastal aquifer the sharp interface toe approaches the well location and (c) the Cyprus Akrotiri aquifer is currently somewhat less threatened by increased seawater intrusion.
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Mazi, K., A. D. Koussis, and G. Destouni. "Intensively exploited Mediterranean aquifers: resilience and proximity to critical points of seawater intrusion." Hydrology and Earth System Sciences Discussions 10, no. 11 (November 14, 2013): 13817–54. http://dx.doi.org/10.5194/hessd-10-13817-2013.

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Abstract. We investigate here seawater intrusion in three prominent Mediterranean aquifers that are subject to intensive exploitation and modified hydrologic regimes by human activities: the Nile Delta Aquifer, the Israel Coastal Aquifer and the Cyprus Akrotiri Aquifer. Using a generalized analytical sharp-interface model, we review the salinization history and current status of these aquifers, and quantify their resilience/vulnerability to current and future sea intrusion forcings. We identify two different critical limits of sea intrusion under groundwater exploitation and/or climatic stress: a limit of well intrusion, at which intruded seawater reaches key locations of groundwater pumping, and a tipping point of complete sea intrusion upto the prevailing groundwater divide of a coastal aquifer. Either limit can be reached, and ultimately crossed, under intensive aquifer exploitation and/or climate-driven change. We show that sea intrusion vulnerability for different aquifer cases can be directly compared in terms of normalized intrusion performance curves. The site-specific assessments show that the advance of seawater currently seriously threatens the Nile Delta Aquifer and the Israel Coastal Aquifer. The Cyprus Akrotiri Aquifer is currently somewhat less threatened by increased seawater intrusion.
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4

Gómez-Cruz, Alicia, Helga Madrigal-Solís, Christian Núñez-Solís, Hazel Calderón-Sánchez, and Pablo Jiménez-Gavilán. "Hydrogeological vulnerability in Jacó coastal aquifers, Central Pacific, Costa Rica." Revista Geográfica de América Central 2, no. 63 (June 14, 2019): 165–87. http://dx.doi.org/10.15359/rgac.63-2.6.

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In the last two decades, the Central Pacific of Costa Rica experienced a strong growth in urban and tourism development. If not regulated, this development can result in a pressure to groundwater resources and, therefore, a threat in terms of quality and quantity. In this study, a hydrogeological vulnerability map of Jacó aquifers was performed, by the GOD method. Geological profiles were elaborated, and field verification was performed. It is confirmed that, in the study area, two aquifers are found: a) a detritic, porous, unconfined coastal aquifer, settled in the Jacó alluvial plain and, b) an aquifer in the basaltic fractured rocks of the Nicoya Complex, unconfined in the mountainous zone and underlying the detritic formation in the central area, where the groundwater is integrated to that of the detrital aquifer. The zone of the alluvial aquifer resulted in a medium vulnerability index, whereas the mountainous areas in a low vulnerability. Management recommendations were proposed.
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5

Halder, Subrata, Lingaraj Dhal, and Madan K. Jha. "Investigating Groundwater Condition and Seawater Intrusion Status in Coastal Aquifer Systems of Eastern India." Water 13, no. 14 (July 16, 2021): 1952. http://dx.doi.org/10.3390/w13141952.

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Providing sustainable water supply for domestic needs and irrigated agriculture is one of the most significant challenges for the current century. This challenge is more daunting in coastal regions. Groundwater plays a pivotal role in addressing this challenge and hence, it is under growing stress in several parts of the world. To address this challenge, a proper understanding of groundwater characteristics in an area is essential. In this study, spatio-temporal analyses of pre-monsoon and post-monsoon groundwater levels of two coastal aquifer systems (upper leaky confined and underlying confined) were carried out in Purba Medinipur District, West Bengal, India. Trend analysis of seasonal groundwater levels of the two aquifers systems was also performed using Mann-Kendall test, Linear Regression test, and Innovative Trend test. Finally, the status of seawater intrusion in the two aquifers was evaluated using available groundwater-quality data of Chloride (Cl−) and Total Dissolved Solids (TDS). Considerable spatial and temporal variability was found in the seasonal groundwater levels of the two aquifers. Further, decreasing trends were spotted in the pre-monsoon and post-monsoon groundwater-level time series of the leaky confined and confined aquifers, except pre-monsoon groundwater levels in Contai-I and Deshpran blocks, and the post-monsoon groundwater level in Ramnagar-I block for the leaky confined aquifer. The leaky confined aquifer in Contai-I, Contai-III, and Deshpran blocks and the confined aquifer in Nandigram-I and Nandigram-II blocks are vulnerable to seawater intrusion. There is an urgent need for the real-time monitoring of groundwater levels and groundwater quality in both the aquifer systems, which can ensure efficient management of coastal groundwater reserves.
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Hermides, Demetrios, Dimitrios Zaxariadis, and George Stamatis. "Hydrochemical characteristics of the Oropos coastal aquifers, Attica, Greece." Bulletin of the Geological Society of Greece 56, no. 1 (March 8, 2020): 39. http://dx.doi.org/10.12681/bgsg.20939.

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This article deals with the hydrochemistry of coastal aquifers of the Oropos plain, Attica, Greece. It is the first study which presents hydrochemical data of the Oropos plain groundwater. Groundwater samples from 34 wells were collected and analyzed for major and heavy metal constituents. Groundwater was differentiated between the Pleistocene confined aquifer and the group of the Holocene, the Miocene and the Mesozoic aquifers based on the electrical conductivity (EC) values and the chlorides content. Groundwater in the Pleistocene sediments presented EC values ranging between 766 and 971μS/cm and chlorides between 95-163mg/l. The group of the rest aquifers presented EC values up to 3770 μS/cm and chlorides up to 993mg/l. The Pleistocene aquifer seems to be protected from seawater intrusion, although, it is located adjacent to the shoreline. In addition, most of the heavy metal concentration exceeded the EU limits. Cd, Fe, Pb, Ni have been determined at 82, 2500, 817, 217 μg/lit respectively. Groundwater was, also, categorized into 2 main water types that of Ca-Mg-HCO3 type indicating recharge of fresh water and that of Ca-Mg-Cl type indicating reverse cation exchange of old Na-Cl waters.
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Zuurbier, Koen Gerardus, and Pieter Jan Stuyfzand. "Consequences and mitigation of saltwater intrusion induced by short-circuiting during aquifer storage and recovery in a coastal subsurface." Hydrology and Earth System Sciences 21, no. 2 (February 27, 2017): 1173–88. http://dx.doi.org/10.5194/hess-21-1173-2017.

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Abstract. Coastal aquifers and the deeper subsurface are increasingly exploited. The accompanying perforation of the subsurface for those purposes has increased the risk of short-circuiting of originally separated aquifers. This study shows how this short-circuiting negatively impacts the freshwater recovery efficiency (RE) during aquifer storage and recovery (ASR) in coastal aquifers. ASR was applied in a shallow saltwater aquifer overlying a deeper, confined saltwater aquifer, which was targeted for seasonal aquifer thermal energy storage (ATES). Although both aquifers were considered properly separated (i.e., a continuous clay layer prevented rapid groundwater flow between both aquifers), intrusion of deeper saltwater into the shallower aquifer quickly terminated the freshwater recovery. The presumable pathway was a nearby ATES borehole. This finding was supported by field measurements, hydrochemical analyses, and variable-density solute transport modeling (SEAWAT version 4; Langevin et al., 2007). The potentially rapid short-circuiting during storage and recovery can reduce the RE of ASR to null. When limited mixing with ambient groundwater is allowed, a linear RE decrease by short-circuiting with increasing distance from the ASR well within the radius of the injected ASR bubble was observed. Interception of deep short-circuiting water can mitigate the observed RE decrease, although complete compensation of the RE decrease will generally be unattainable. Brackish water upconing from the underlying aquitard towards the shallow recovery wells of the ASR system with multiple partially penetrating wells (MPPW-ASR) was observed. This leakage may lead to a lower recovery efficiency than based on current ASR performance estimations.
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Harley, B. M., M. Gamache, K. K. Masterson, and R. H. Fitzgerald. "Twenty five years of operational experience using GW modeling to evaluate sustainable use of coastal aquifers for major water supplies." Water Practice and Technology 10, no. 3 (September 1, 2015): 465–73. http://dx.doi.org/10.2166/wpt.2015.053.

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The sustainable development and management of groundwater resources in coastal aquifers is complex and, historically, challenging to accomplish. Groundwater models play an essential role in addressing these complexities and providing the basis for planning future sustainable development. For more than 25 years, the authors have applied three-dimensional groundwater models to manage large scale coastal aquifers. The paper will present case studies demonstrating the application of groundwater models to evaluate conditions in complex coastal environments and to develop sustainable groundwater management strategies. These studies include Long Island, a sole source aquifer system in New York serving nearly 3 million people; aquifers in Southern California where injection barriers are used to prevent saltwater intrusion; and Savannah, Georgia in the southeastern US, where concentrated groundwater pumping has contributed to saltwater intrusion at a nearby resort island, and planning is underway to ensure a sustainable groundwater supply to both local industries and municipalities.
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Etsias, Georgios, Gerard A. Hamill, Christopher Thomson, Samuel Kennerley, Jesús F. Águila, Eric M. Benner, Mark C. McDonnell, Ashraf A. Ahmed, and Raymond Flynn. "Laboratory and Numerical Study of Saltwater Upconing in Fractured Coastal Aquifers." Water 13, no. 23 (November 24, 2021): 3331. http://dx.doi.org/10.3390/w13233331.

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This study investigated the saltwater upconing mechanism in fractured coastal aquifers. Head-induced saline intrusion was initiated into three narrow sandbox aquifers containing individual horizontal discontinuities placed on different positions. Subsequently, using a peristaltic pump, freshwater was abstracted from the aquifers’ center, triggering saltwater upconing. Progressively larger pumping rates were applied until critical conditions, resulting in the wells’ salinization, were achieved. Advanced image analysis algorithms were utilized to recreate the saltwater concentration fields and quantify the extent of the saline wedges with a high accuracy. A numerical model was successfully employed to simulate the laboratory results and conduct a comprehensive sensitivity analysis, further expanding the findings of this investigation. The impact of the fractures’ length, permeability and position on the upconing mechanism was identified. It was established that the presence of high permeability discontinuities significantly affected aquifer hydrodynamics. The conclusions of this study could constitute a contribution towards the successful management of real-world fractured coastal aquifers.
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Eissa, Mustafa A. "Application of Multi-Isotopes and Geochemical Modeling for Delineating Recharge and Salinization Sources in Dahab Basin Aquifers (South Sinai, Egypt)." Hydrology 5, no. 3 (August 4, 2018): 41. http://dx.doi.org/10.3390/hydrology5030041.

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The Dahab watershed comprises three aquifers; the alluvial Quaternary, the Early Cambrian sandstone, and the fractured Pre-Cambrian basement aquifers. The Dahab watershed is located in the southeastern part of the arid Sinai Peninsula, where low precipitation and groundwater over-exploitation deteriorate the groundwater quality in the alluvial coastal plain aquifer located downstream. Multi-isotopes including δ18O and δ2H, 87Sr/86Sr, δ81Br and δ11B coupled with groundwater geochemistry were utilized to assess the recharge source(s), water-rock interaction, and seawater mixing to aid sustainable groundwater management strategies. Br and Cl concentrations, used to measure groundwater salinity, were low in the upstream groundwater, while higher concentrations were observed in the deep drilled wells located downstream, in the main well field. The δ18O and δ2H isotopes were depleted in the upstream aquifers, but enriched in the shallow coastal aquifer, indicating slight evaporation and seawater intrusion. Higher mean values of 87Sr/86Sr and δ81Br were observed in the fresh groundwater from high in the watershed (87Sr/86Sr = 0.707716 and δ81Br = +2.05‰), while lower mean values were observed in the saline groundwater located downstream in the main well field (87Sr/86Sr = 0.706631 and δ81Br = +0.11‰). The cumulative mass balance mixing curves and the geochemical NETPATH model confirm the change of groundwater quality from the upper to lower watershed caused by the leaching and evaporation processes, as well as mixing with seawater. The corrected 14C age dating and stable isotopes show that the Quaternary and Pre-Cambrian basement aquifers contain modern groundwater, while the Early Cambrian aquifer holds paleo-groundwater, which has received considerable recharge from recent precipitation. The mixing ratiosin the Quaternary coastal aquifer range between 5% and 13% seawater to 95% and 87% fresh groundwater, respectively. These results indicate that future groundwater withdrawal must be well managed in order to limit further salinization. Groundwater withdrawal from the Quaternary coastal aquifer must be below the natural average recharge in order to be sustainable.
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Dissertations / Theses on the topic "Coastal aquifers"

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Park, Chan-Hee. "Saltwater Intrusion in Coastal Aquifers." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4857.

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Utilizing the analytical solution of the steady state sharp interface saltwater intrusion model in coastal aquifers, a multi-objective optimization formulation of pumping rates and well locations in a coastal aquifer is formulated to solve problems in water management practice. The proposed optimization problem uses progressive genetic algorithm technique and the method developed is applied to the previous work of Cheng et al. [2000]. Through this analysis, several other applications are provided to demonstrate the use of the model in practical applications. This work is the first to optimize pumping rates as well as well locations simultaneously in coastal aquifer management. Known the limitation of the analytical solution, the work is expanded to cover the physics of saltwater intrusion in a more realistic way. This is variable density flow in a variably saturated porous medium. In this method, mixing between two fluids such as saltwater and freshwater can be described and the porous medium is also expanded to cover saturated and unsaturated zones together. One of the objectives is to develop a three dimensional physical model, verify the model, and apply to various applications in coastal aquifers. The developed model, TechFlow, is used to investigate instability issues associated with the numerical solution of the Elder problem in the perspective that includes physical instability issues associated with density differences used in numerical solutions, sensitivity of the solution to idealization irregularity, and the importance of accurate estimation of the velocity field and its association to the grid density levels that is necessary to solve the problem accurately. Saltwater intrusion hydrodynamics in a beach under the influence of tidal effects is also investigated using TechFlow. Based on the results of TechFlow with the use of various boundary conditions for the transport equation, the saltwater intrusion hydrodynamics in a beach under the influence of tidal effects shows unique dynamics. These solutions are primarily affected by density differences, tidal effects on a mild slope, variably saturated porous medium and finite domain solution condition. TechFlow is also used to investigate saltwater upconing beneath pumping wells both two- and three-dimensional applications.
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Teo, Hhih-Ting, and h. teo@griffith edu au. "Tidal Dynamics in Coastal Aquifers." Griffith University. School of Engineering, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030729.155028.

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The prediction of coastal groundwater movement is necessary in coastal management. However, the study in this field is still a great challenge due to the involvement of tidal-groundwater interactions and the phenomena of hydrodynamic dispersion between salt-fresh water in the coastal region. To date, numerous theories for groundwater dynamic have been made available in analytical, numerical and also experimental forms. Nevertheless, most of them are based on the zeroth-order shallow flow, i.e. Boussinesq approximation. Two main components for coastal unconfined aquifer have been completed in this Thesis: the vertical beach model and the sloping beach model. Both solutions are solved in closed-form up to higher order with shallow water parameter ([epsilon]) and tidal amplitude parameter ([alpha]). The vertical beach solution contributes to the higher-order tidal fluctuations while the sloping beach model overcomes the shortcomings in the existing solutions. From this study, higher-order components are found to be significant especially for larger value of [alpha] and [epsilon]. Other parameters such as hydraulic conductivity (K) and the thickness of aquifer (D) also affect the water table fluctuations. The new sloping solution demonstrated the significant influence of beach slope ([beta]) on the water table fluctuations. A comprehensive comparison between previous solution and the present sloping solution have been performed mathematically and numerically and the present solution has been demonstrated to provide a better prediction
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Teo, Hhih-Ting. "Tidal Dynamics in Coastal Aquifers." Thesis, Griffith University, 2003. http://hdl.handle.net/10072/365678.

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The prediction of coastal groundwater movement is necessary in coastal management. However, the study in this field is still a great challenge due to the involvement of tidal-groundwater interactions and the phenomena of hydrodynamic dispersion between salt-fresh water in the coastal region. To date, numerous theories for groundwater dynamic have been made available in analytical, numerical and also experimental forms. Nevertheless, most of them are based on the zeroth-order shallow flow, i.e. Boussinesq approximation. Two main components for coastal unconfined aquifer have been completed in this Thesis: the vertical beach model and the sloping beach model. Both solutions are solved in closed-form up to higher order with shallow water parameter ([epsilon]) and tidal amplitude parameter ([alpha]). The vertical beach solution contributes to the higher-order tidal fluctuations while the sloping beach model overcomes the shortcomings in the existing solutions. From this study, higher-order components are found to be significant especially for larger value of [alpha] and [epsilon]. Other parameters such as hydraulic conductivity (K) and the thickness of aquifer (D) also affect the water table fluctuations. The new sloping solution demonstrated the significant influence of beach slope ([beta]) on the water table fluctuations. A comprehensive comparison between previous solution and the present sloping solution have been performed mathematically and numerically and the present solution has been demonstrated to provide a better prediction
Thesis (Masters)
Master of Philosophy (MPhil)
School of Engineering
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Costall, Alexander Ross. "Hydro-geophysics in High-Quality Coastal Aquifers." Thesis, Curtin University, 2020. http://hdl.handle.net/20.500.11937/82107.

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Electrical resistivity imaging (ERI) and groundwater solute transport modelling are developed for recovery of the hydrogeological architecture of coastal margins. ERI acquisition and processing parameters, along with the influence of hydraulic anisotropy and heterogeneity in karstic aquifers, are explored with examples selected along more than 100 km of coastline proximal to Perth Western Australia. The methods will contribute to accurate predictive groundwater modelling and sustainable management of high-quality coastal aquifers worldwide.
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Demirbas, Korkut. "Optimal Management Of Coastal Aquifers Using Heuristic Algorithms." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613135/index.pdf.

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Excessive pumping in coastal aquifers results in seawater intrusion where optimal and efficient planning is essential. In this study, numerical solution of single potential solution by Strack is combined with genetic algorithm (GA) to find the maximum extraction amount in a coastal aquifer. Seawater intrusion is tracked with the potential value at the extraction well locations. A code is developed by combining GA and a subroutine repeatedly calling MODFLOW as a numerical solver to calculate the potential distribution for different configurations of solution (trial solutions). Potential distributions are used to evaluate the fitness values for GA. The developed model is applied to a previous work by Mantoglou. Another heuristic method, simulated annealing (SA) is utilized to compare the results of GA. Different seawater prevention methods (i.e. injection wells, canals) and decision variables related to those methods (i.e. location of the injection wells or canals) are added to model to further prevent the seawater intrusion and improve the coastal aquifer benefit. A method called &ldquo
Alternating Constraints Method&rdquo
is introduced to improve the solution for the cases with variable location. The results show that both proposed method and the regular solution with GA or SA prove to be successful methods for the optimal management of coastal aquifers.
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Karam, Hanan Nadim. "Seawater circulation in coastal aquifers : processes and impacts." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78141.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 150-154).
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.
by Hanan Nadim Karam.
Ph.D.
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Mary, Makokha. "Seawater intrusion and contaminant transport in coastal aquifers." Kyoto University, 2008. http://hdl.handle.net/2433/136601.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(農学)
甲第13874号
農博第1689号
新制||農||953(附属図書館)
学位論文||H20||N4341(農学部図書室)
UT51-2008-C790
京都大学大学院農学研究科地域環境科学専攻
(主査)准教授 小林 晃, 教授 河地 利彦, 教授 川島茂人
学位規則第4条第1項該当
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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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Ayutthaya, Sarinya Sanitwong-Na. "Impacts of climate change on groundwater levels in coastal aquifers." Thesis, University of Dundee, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.505624.

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Cumming, Benjamin Donald. "Modelling sea water intrusion in coastal aquifers using heterogeneous computing." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/61038/1/Benjamin_Cumming_Thesis.pdf.

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The objective of this PhD research program is to investigate numerical methods for simulating variably-saturated flow and sea water intrusion in coastal aquifers in a high-performance computing environment. The work is divided into three overlapping tasks: to develop an accurate and stable finite volume discretisation and numerical solution strategy for the variably-saturated flow and salt transport equations; to implement the chosen approach in a high performance computing environment that may have multiple GPUs or CPU cores; and to verify and test the implementation. The geological description of aquifers is often complex, with porous materials possessing highly variable properties, that are best described using unstructured meshes. The finite volume method is a popular method for the solution of the conservation laws that describe sea water intrusion, and is well-suited to unstructured meshes. In this work we apply a control volume-finite element (CV-FE) method to an extension of a recently proposed formulation (Kees and Miller, 2002) for variably saturated groundwater flow. The CV-FE method evaluates fluxes at points where material properties and gradients in pressure and concentration are consistently defined, making it both suitable for heterogeneous media and mass conservative. Using the method of lines, the CV-FE discretisation gives a set of differential algebraic equations (DAEs) amenable to solution using higher-order implicit solvers. Heterogeneous computer systems that use a combination of computational hardware such as CPUs and GPUs, are attractive for scientific computing due to the potential advantages offered by GPUs for accelerating data-parallel operations. We present a C++ library that implements data-parallel methods on both CPU and GPUs. The finite volume discretisation is expressed in terms of these data-parallel operations, which gives an efficient implementation of the nonlinear residual function. This makes the implicit solution of the DAE system possible on the GPU, because the inexact Newton-Krylov method used by the implicit time stepping scheme can approximate the action of a matrix on a vector using residual evaluations. We also propose preconditioning strategies that are amenable to GPU implementation, so that all computationally-intensive aspects of the implicit time stepping scheme are implemented on the GPU. Results are presented that demonstrate the efficiency and accuracy of the proposed numeric methods and formulation. The formulation offers excellent conservation of mass, and higher-order temporal integration increases both numeric efficiency and accuracy of the solutions. Flux limiting produces accurate, oscillation-free solutions on coarse meshes, where much finer meshes are required to obtain solutions with equivalent accuracy using upstream weighting. The computational efficiency of the software is investigated using CPUs and GPUs on a high-performance workstation. The GPU version offers considerable speedup over the CPU version, with one GPU giving speedup factor of 3 over the eight-core CPU implementation.
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Books on the topic "Coastal aquifers"

1

Mark, Bakker, and National Risk Management Research Laboratory (U.S.), eds. Analytic element modeling of coastal aquifers. Cincinnati, OH: National Risk Management Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 2000.

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Mark, Bakker, and National Risk Management Research Laboratory (U.S.), eds. Analytic element modeling of coastal aquifers. Cincinnati, OH: National Risk Management Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 2000.

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Aucott, Walter R. Selected aquifer-test information for the Coastal Plain aquifers of South Carolina. Columbia, S.C: U.S. Dept. of the Interior, Geological Survey, 1986.

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Aucott, Walter R. Selected aquifer-test information for the Coastal Plain aquifers of South Carolina. Columbia, S.C: U.S. Dept. of the Interior, Geological Survey, 1986.

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Aucott, Walter R. Selected aquifer-test information for the Coastal Plain aquifers of South Carolina. Columbia, S.C: U.S. Dept. of the Interior, Geological Survey, 1986.

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Dion, N. P. Sea-water intrusion into coastal aquifers in Washington, 1978. Olympia, Wash: State of Washington, Dept. of Ecology, 1985.

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Planert, Michael. Geohydrology of the southeastern coastal plain: Aquifer system in Alabama. Washington: U.S. G.P.O., 1993.

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Hutchison, William R. Aquifers of the upper coastal plains of Texas. Austin, Tex: Texas Water Development Board, 2009.

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McFarland, E. Randolph. The Virginia coastal plain hydrogeologic framework. Reston, Va: U.S. Dept. of the Interior, U.S. Geological Survey, 2006.

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Miller, James A. Nomenclature of regional hydrogeologic units of the Southeastern Coastal Plain aquifer system. Atlanta, Ga: Dept. of the Interior, U.S. Geological Survey, 1988.

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Book chapters on the topic "Coastal aquifers"

1

Chidambaram, S., C. Thivya, A. L. Ramanathan, R. Thilagavathi, and M. V. Prasanna. "Characterization of Coastal Aquifers in SE Coast of India." In Springer Hydrogeology, 475–95. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-3889-1_29.

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Siegel, Frederic R. "Arresting/Controlling Saltwater Contamination of Coastal Aquifers." In Adaptations of Coastal Cities to Global Warming, Sea Level Rise, Climate Change and Endemic Hazards, 5–9. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22669-5_2.

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Abd-Elhamid, Hany F., Ismail Abd-Elaty, and Abdelazim M. Negm. "Control of Saltwater Intrusion in Coastal Aquifers." In The Handbook of Environmental Chemistry, 355–84. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/698_2017_138.

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Abd-Elaty, Ismail, Hany F. Abd-Elhamid, and Abdelazim M. Negm. "Investigation of Saltwater Intrusion in Coastal Aquifers." In The Handbook of Environmental Chemistry, 329–53. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/698_2017_190.

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Bakker, Mark, and Vincent Post. "Steady one-dimensional flow in coastal aquifers." In Analytical Groundwater Modeling, 55–67. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781315206134-4.

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Yechieli, Yoseph. "Introduction to Studies of Coastal Aquifers of Israel." In Springer Hydrogeology, 29. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51148-7_3.

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Wagner, Wolfgang. "Aquifers in Coastal Plains of the Arabian Plate." In Groundwater in the Arab Middle East, 377–411. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19351-4_9.

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Fukuhara, T., and T. Fukui. "Analyses of Fresh — Salt Water Interface in Coastal Aquifers." In Boundary Elements VIII, 869–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-662-22335-2_33.

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Jacob, Subin Abraham, Robin Alexander, Kevin Varghese, Juval Joy, and Rinu J. Achison. "Salinity Mapping of Coastal Aquifers Using GIS and GALDIT." In Lecture Notes in Civil Engineering, 117–28. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80312-4_11.

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Jayasingha, Pathmakumara, A. Pitawala, and H. A. Dharmagunawardhane. "A Review on Nutrient Pollution of Coastal Aquifers of Sri Lanka." In Coastal Environments: Focus on Asian Regions, 66–77. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-3002-3_5.

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Conference papers on the topic "Coastal aquifers"

1

Hsu, Nien-Sheng, and Chia-Chang Hsu. "Parameter Estimation in Unconfined Coastal Aquifers." In World Water and Environmental Resources Congress 2004. Reston, VA: American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40737(2004)367.

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Mahmoodzadeh, Davood, and Mohammad Karamouz. "Influence of Coastal Flooding on Seawater Intrusion in Coastal Aquifers." In World Environmental and Water Resources Congress 2017. Reston, VA: American Society of Civil Engineers, 2017. http://dx.doi.org/10.1061/9780784480618.007.

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Cogswell, Clara, and James Heiss. "TEMPERATURE EFFECTS ON NITROGEN CYCLING IN COASTAL AQUIFERS." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-358890.

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Letha, J., and D. B. Krishnan. "Seawater intrusion into coastal aquifers – a case study." In SUSTAINABLE CITY 2008. Southampton, UK: WIT Press, 2008. http://dx.doi.org/10.2495/sc080211.

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Abd-Elhamid, H. F., and A. A. Javadi. "Mathematical Models to Control Saltwater Intrusion in Coastal Aquifers." In GeoCongress 2008. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40972(311)98.

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Kiro, Yael, Holly Michael, Carlos Duque, Yoseph Yechieli, and Itay Reznik. "Identifying and Quantifying Long-Term Seawater Circulation in Coastal Aquifers." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.1326.

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Di Mauro, M., A. Manzella, G. Ranieri, G. P. Deidda, and A. Casas. "Groundwater Inspection in Coastal Aquifers Using MT and AMT Methods." In Near Surface 2005 - 11th European Meeting of Environmental and Engineering Geophysics. European Association of Geoscientists & Engineers, 2005. http://dx.doi.org/10.3997/2214-4609-pdb.13.b038.

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Basdurak, Nuvit B., Halil Onder, and Louis H. Motz. "Analysis of Techniques to Limit Saltwater Intrusion in Coastal Aquifers." In World Environmental and Water Resources Congress 2007. Reston, VA: American Society of Civil Engineers, 2007. http://dx.doi.org/10.1061/40927(243)177.

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Abdullatif, Osman, Mutasim Osman, Mazin Bashri, Ammar Abdlmutalib, and Mohamed Yassin. "Sedimentology and Evolution of the Fluvial-Deltaic System: A Modern Depositional Model Analog from the Red Sea Coastal Region, Saudi Arabia." In SPE Middle East Oil & Gas Show and Conference. SPE, 2021. http://dx.doi.org/10.2118/204558-ms.

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Abstract Siliciclastic sediments represent important lithological unit of the Red Sea coastal plain. Their subsurface equivalents are important targets of groundwater aquifer and hydrocarbon reservoirs in the region. The lithofacies of the modern fluvial deltaic system has several distinct geomorphic units and sub-environments such as alluvial, fluvial, delta plain, aeolian, intertidal, coastal sabkha and eustuarine sediments. This study intends to characterize the lithofacies and the depositional environments and to produce an integrated facies model for this modern fluvial-deltaic system. The study might provide a valuable modern analog to several important subsurface Neogene formations that act as important hydrocarbon reservoirs and groundwater aquifers. The study integrates information and data obtained from landsats, maps and detailed field observation and measurements of facies analysis of the fluvial and deltaic along traveses from the Arabian Shield to the Red Sea coast. The lithofacies sediment analysis revealed four main lithofacies associations namely lithofacies A,B,C ad D. Lithoacies Associations A, which represents the oldest unit is dominated by coarse gravel with minor sands facies. While the lithofacies B is dominated byfine gravel and sand lithofacies, occasionally pebbly, vary from horizontal, planar to massive sands with minor laminated to massive silts and mud facies. The lithofacies in A and B show lateral proximal to distal variation as well as characteristic vertical stacking patterns. The Facies Association A and B indicates a change in fluvial depositional styles from gravelly alluvial fans to gravelly sandy fluvial systems. The lithofacies association C represents the recent fluvial system which consists of minor gravel lag deposits associated maily with various sand lithofacies of planner, horizontal and massive sand associated with massive and limainted sand and mud lithofacies. The lithofacies Association D is dominated with Barchan sand dunes local interfigger with muddy iinterdunes and sand sheets. Lithofacies D occupies rather more distal geomporphic position of the fluvial deltaic system that is adjace to coastal sabkha. The lithofacies associations described here document the evolution and development of the coastal plain sediments through space and time under various autocyclic and allocyclic controls. This included the tectonics and structural development associated with the Red Sea rifting and opening since the Oligocene – Miocene time. Others controls include the evolution of the Arabian shield (provenance) and the coastal plain through space and time as controlled by tectonics, sediment supply, climate and locally by autocyclic environmental This study might be beneficial for understanding the controls and stratigraphic evolution of the Red Sea region and will be of great value for reservoir and aquifer characterization, development and management. This modern analog model can also help in providing geological baseline information that would be beneficial for understanding similar ancient fluvial deltaic sediments. The study might provide guides and leads to understand the subsurface facies, stratigraphic architecture and heterogeneity of any potential groundwater aquifers and hydrocarbon reservoirs.
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Vouillamoz, J. M., B. Chatenoux, F. Mathieu, J. M. Baltassat, and A. Legchenko. "Characterization of Unconsolidated Coastal Aquifers with Magnetic Resonance and Electrical Soundings." In Near Surface 2005 - 11th European Meeting of Environmental and Engineering Geophysics. European Association of Geoscientists & Engineers, 2005. http://dx.doi.org/10.3997/2214-4609-pdb.13.b048.

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Reports on the topic "Coastal aquifers"

1

Tan, Kok Piang, Jonathan Clarke, Larysa Halas, Ken Lawrie, Heike Apps, Ross C. Brodie, Marina Costelloe, et al. Northern Territory Coastal Plain : Mapping Seawater Intrusion in Coastal Plain Aquifers using Airborne Electromagnetic Data. Geoscience Australia, 2012. http://dx.doi.org/10.11636/record.2012.041.

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Shafer, J. M., E. R. Covington, J. M. Rine, and R. C. Berg. Incorporation of groundwater flow into traditional sensitivity analysis of a southeast coastal plain layered aquifer system. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2006. http://dx.doi.org/10.4095/221895.

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Doliber, Sarah. Groundwater Surface Trends in the North Florence Dunal Aquifer, Oregon Coast, USA. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.530.

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Toran, L. E., J. F. McCarthy, and T. M. Williams. Design of a field experiment for injection of natural colloids in a sandy coastal plain aquifer, Belle W. Baruch Forest Science Institute, Georgetown, South Carolina. Office of Scientific and Technical Information (OSTI), June 1990. http://dx.doi.org/10.2172/6424186.

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Selected aquifer-test information for the coastal plain aquifers of South Carolina. US Geological Survey, 1986. http://dx.doi.org/10.3133/wri864159.

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Geohydrologic framework of the coastal plain aquifers of South Carolina. US Geological Survey, 1987. http://dx.doi.org/10.3133/wri854271.

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Water quality of surficial aquifers in the Georgia-Florida Coastal Plain. US Geological Survey, 1996. http://dx.doi.org/10.3133/wri954269.

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Aquifers in Cretaceous rocks of the central Coastal Plain of North Carolina. US Geological Survey, 1989. http://dx.doi.org/10.3133/wri874178.

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Approximate potentiometric surfaces for the aquifers of the Texas coastal uplands system, 1980. US Geological Survey, 1987. http://dx.doi.org/10.3133/ha704.

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Potentiometric surfaces of the coastal plain aquifers of South Carolina prior to development. US Geological Survey, 1985. http://dx.doi.org/10.3133/wri844208.

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