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1. Minimization of Transient Groundwater Pumping Cost - Analytical and Practical Solutions

Author:
Katsifarakis, K.L.; Nikoletos, I.A.; Stavridis, Ch.
Source:
Water resources management 2018 v.32 no.3 pp. 1053-1069
ISSN:
0920-4741
Subject:
groundwater; groundwater flow,   etc   ; aquifers; wells;     Show all 4 Subjects
Abstract:
... In this paper, we study pumping cost minimization for any number and layout of wells under transient groundwater flow conditions in infinite confined aquifers and semi-infinite ones, to which the method of images applies. Moreover, we take into account additional steady-state flow, which is independent of the well system and results in non-horizontal initial hydraulic head level distribution. We p ...
DOI:
10.1007/s11269-017-1854-8

2. Chromium(VI) removal by mechanochemically sulfidated zero valent iron and its effect on dechlorination of trichloroethene as a co-contaminant

Author:
Zou, Haowen; Hu, Erdan; Yang, Shangyuan; Gong, Li; He, Feng
Source:
The Science of the total environment 2019 v.650 pp. 419-426
ISSN:
0048-9697
Subject:
groundwater; groundwater contamination,   etc   ; chromium; dechlorination; dissolved oxygen; electron transfer; electrons; hydrogen; iron; models; pH; protons; remediation;     Show all 13 Subjects
Abstract:
... Mechanochemically sulfidated microscale zero valent iron (S-mZVIᵇᵐ) is a promising groundwater remediation material as it has been proven to be not only efficient in dechlorinating chlorinated compounds but also amenable to up-scaling. Yet, its efficiency in treating metal contaminants remains barely studied. In this study, we investigated the mechanism and efficiencies of Cr(VI) removal by S-mZVI ...
DOI:
10.1016/j.scitotenv.2018.09.003

3. Remediating Contaminant Plumes in Groundwater with Shallow Excavations Containing Coarse Reactive Media

Author:
Hudak, PaulF.
Source:
Environmental management 2018 v.61 no.2 pp. 304-309
ISSN:
0364-152X
Subject:
groundwater; groundwater contamination; groundwater flow,   etc   ; aquifers; mass transfer; models;     Show all 6 Subjects
Abstract:
... A groundwater flow and mass transport model tested the capability of shallow excavations filled with coarse, reactive media to remediate a hypothetical unconfined aquifer with a maximum saturated thickness of 5 m. Modeled as contaminant sinks, the rectangular excavations were 10 m downgradient of an initial contaminant plume originating from a source at the top of the aquifer. The initial plume wa ...
DOI:
10.1007/s00267-017-0977-2

4. Impact of Local Groundwater Flow Model Errors on Transport and a Practical Solution for the Issue

Author:
Panday, Sorab; Bedekar, Vivek; Langevin, Christian D.
Source:
Ground water 2018 v.56 no.4 pp. 667-672
ISSN:
0017-467X
Subject:
groundwater; groundwater flow,   etc   ; advection; equations; models; solutes;     Show all 6 Subjects
Abstract:
... A groundwater flow model is typically used to provide the flow field for conducting groundwater solute transport simulations. The advection term of the mass conserved formulation for groundwater transport assumes that the flow field is perfectly balanced and that all water flowing into a numerical grid cell is exactly balanced by outflows after accounting for sources/sinks or internal storage. How ...
DOI:
10.1111/gwat.12627

5. Modeling Dewatered Domains in Multilayer Analytic Element Models

Author:
Fitts, Charles R.
Source:
Ground water 2018 v.56 no.4 pp. 557-561
ISSN:
0017-467X
Subject:
groundwater,   etc   ; dewatering; models;     Show all 3 Subjects
Abstract:
... This proposed technique allows sensible and numerically stable behavior in multilayer analytic element models when layers dewater. When saturated thickness approaches zero in an unconfined or fresh/salt interface domain, the domain transitions to a very thin confined domain with a minimum saturated thickness M. M is an adjustable input parameter, so you can make the horizontal flow in dewatered do ...
DOI:
10.1111/gwat.12645

6. Shallow Unconfined Flow on a Sloping Base Redux

Author:
Barnes, Randal J.
Source:
Ground water 2018 v.56 no.4 pp. 610-617
ISSN:
0017-467X
Subject:
groundwater,   etc   ; aquifers; children; models;     Show all 4 Subjects
Abstract:
... When is the impact of a sloping base large enough to justify more complex models for an unconfined aquifer? The intuitive answer that “it depends on the magnitude of the slope” is not wholly correct. Using recent mathematical results (the Lambert W function), we explicitly solve the simple sloping base problem. This explicit solution offers insights beyond those possible using Dupuit's, Polubarino ...
DOI:
10.1111/gwat.12607

7. The strategy of reducing groundwater exploitation and the south-to-north water diversion project

Author:
Yang, Jian-Qing; Zhao, Hong-Yi; Yang, Zhong-Shan; Huang, Zhen-Fang; Bai, Guo-Ying; Liu, Cui-Zhu
Source:
TheInternational journal of environmental studies 2018 v.75 no.1 pp. 59-67
ISSN:
1029-0400
Subject:
groundwater,   etc   ; water resources; China;     Show all 3 Subjects
Abstract:
... China has limited water resources, especially in the northern region. Therefore, there has been great dependence on groundwater. As a result, ecological and geological problems related to excessive groundwater exploitation frequently occur. The south-to-north water diversion project is intended to overcome these difficulties. The paper gives an account of the project and focuses on Beijing; discus ...
DOI:
10.1080/00207233.2017.1389569

8. Industrial Groundwater of the Olenek Artesian Basin: Geochemistry and Development Prospects

Author:
Alekseeva, L.P.; Alekseev, S.V.
Source:
Water resources 2018 v.45 no.1 pp. 79-88
ISSN:
0097-8078
Subject:
groundwater,   etc   ; basins; geochemistry; quarries;     Show all 4 Subjects
Abstract:
... The Olenek Artesian Basin contains in its subsurface huge reserves of hydromineral resources with extremely high concentrations of many useful components. The presented estimates of prospective reserves of brines drained by a large diamond-mining quarry proves the extremely high potential of the use of “liquid ore” as an alternative to solid mineral deposits. ...
DOI:
10.1134/S0097807818010025

9. Characterization of polybrominated diphenyl ethers (PBDEs) in various aqueous samples in Taiwan

Author:
Trinh, Minh Man; Tsai, Ching Lan; Chang, Moo Been
Source:
The Science of the total environment 2019 v.649 pp. 388-395
ISSN:
0048-9697
Subject:
groundwater,   etc   ; polybrominated diphenyl ethers; surface water; water treatment; Taiwan;     Show all 5 Subjects
Abstract:
... In this study, 20 groundwater samples and 7 surface water samples were collected and analyzed by HRGC-HRMS to evaluate the levels, congener distributions, and dissolved/solid partitioning of polybrominated diphenyl ethers (PBDEs) in water matrix as well as the removal efficiency of a typical water treatment plant (WTP). The results indicated that the level of PBDEs concentrations ranging from 18.5 ...
DOI:
10.1016/j.scitotenv.2018.08.204

10. Numerical simulation of particle migration from crushed sandstones during groundwater inrush

Author:
Wang, Yingchao; Geng, Fan; Yang, Shengqi; Jing, Hongwen; Meng, Bo
Source:
Journal of hazardous materials 2019 v.362 pp. 327-335
ISSN:
0304-3894
Subject:
groundwater,   etc   ; engineering; friction; mathematical models; sandstone; water flow;     Show all 6 Subjects
Abstract:
... Groundwater inrush through fault fracture zones is caused by small particle migration from fractured rocks of the faults. To investigate particle migration with the water flow, a 3D model was established for the solid-water two-phase flow. First, the simulated crushed sandstone was represented by certain different-sized particles with a novel cohesive force. The discrete element method (DEM) was a ...
DOI:
10.1016/j.jhazmat.2018.09.011

11. Hydrodynamics of salt flat basins: The Salar de Atacama example

Author:
Marazuela, M.A.; Vázquez-Suñé, E.; Ayora, C.; García-Gil, A.; Palma, T.
Source:
The Science of the total environment 2019 v.651 pp. 668-683
ISSN:
0048-9697
Subject:
groundwater; groundwater flow,   etc   ; basins; ecosystems; freshwater; hydrodynamics; hydrogeology; infiltration rate; lakes; lithium; mixing; models; mountains; rain; rocks; vegetation; water table;     Show all 17 Subjects
Abstract:
... The Salar de Atacama is one of the most well-known saline endorheic basins in the world. It accumulates the world main lithium reserves and contains very sensitive ecosystems. The objective of this work is to characterize the hydrodynamics of the Salar de Atacama, and to quantify its complex water balance prior to the intense brine extraction. The methodology and results can be extrapolated to the ...
DOI:
10.1016/j.scitotenv.2018.09.190

12. Bioremediation capability evaluation of benzene and sulfolane contaminated groundwater: Determination of bioremediation parameters

Author:
Yang, Chu-Fang; Liu, Shu-Hui; Su, Yu-Min; Chen, Yu-Rong; Lin, Chi-Wen; Lin, Keng-Li
Source:
The Science of the total environment 2019 v.648 pp. 811-818
ISSN:
0048-9697
Subject:
groundwater; groundwater contamination,   etc   ; bacteria; benzene; bioaugmentation; biodegradation; dissolved oxygen; monitoring; oil and gas industry; phosphates; soil; toxic substances; trace elements;     Show all 13 Subjects
Abstract:
... Benzene and sulfolane are commonly used but hazardous chemicals in the petrochemical industry and their leakage and inappropriate disposal certainly causes serious soil and groundwater contamination. In this research, the bioremediation potential of groundwater contaminated with benzene and sulfolane was evaluated, and the operating parameters for bioremediation were established through laboratory ...
DOI:
10.1016/j.scitotenv.2018.08.208

13. The interfacial reactivity of arsenic species with green rust sulfate (GRSO4)

Author:
Perez, Jeffrey Paulo H.; Freeman, Helen M.; Schuessler, Jan A.; Benning, Liane G.
Source:
The Science of the total environment 2019 v.648 pp. 1161-1170
ISSN:
0048-9697
Subject:
groundwater; groundwater contamination,   etc   ; adsorbents; adsorption; anaerobic conditions; arsenic; ionic strength; ions; iron; magnesium; pH; phosphates; sulfates; toxicity;     Show all 14 Subjects
Abstract:
... Arsenic (As) contamination in groundwater is a significant health and environmental concern worldwide because of its wide distribution and toxicity. The fate and mobility of As is greatly influenced by its interaction with redox-active mineral phases, among which green rust (GR), an Feᴵᴵ-Feᴵᴵᴵ layered double hydroxide mineral, plays a crucial role. However, the controlling parameters of As uptake ...
DOI:
10.1016/j.scitotenv.2018.08.163

14. Investigation on the sustainability and efficiency of single-well circulation (SWC) groundwater heat pump systems

Author:
Wu, Qiang; Tu, Kun; Sun, Haizhou; Chen, Chaofan
Source:
Renewable energy 2019 v.130 pp. 656-666
ISSN:
0960-1481
Subject:
groundwater; groundwater flow,   etc   ; buildings; cooling; cost effectiveness; heat; heat pumps; porosity; renewable energy sources; systems engineering; temperature; thermal conductivity;     Show all 12 Subjects
Abstract:
... Among various groundwater heat pump (GWHP) system configurations, the single-well circulation (SWC) groundwater heat pump system is totally different with other conventional GWHP systems. In recent years, the SWC system has gained increasing interest due to the fact that it is a cost-effective technology providing large quantities of heating and cooling to buildings. The performance of a SWC syste ...
DOI:
10.1016/j.renene.2018.06.107

15. Reliability and risk assessment for radioactive release to a Quaternary aquifer considering specified limit as resistance and in situ groundwater condition as load

Author:
Shih, David Ching-Fang
Source:
Journal of hydrology 2018 v.565 pp. 552-558
ISSN:
0022-1694
Subject:
groundwater; groundwater contamination,   etc   ; aquifers; environmental monitoring; pollutants; radioactivity; risk assessment;     Show all 7 Subjects
Abstract:
... Radioactive pollutants enter the subsurface hydrology environment commonly because of operation or accidental leakage from nuclear sites. In some occasions, heterogeneity in the groundwater system controls the fate of water transport in the aquifer; it determines how contaminated groundwater change at site boundary. Assumption of uniform and homogeneous conditions in subsurface hydrology will lead ...
DOI:
10.1016/j.jhydrol.2018.08.065

16. Closed Analytic Elements with Flexible Geometry

Author:
Ranjram, Mark; Craig, James R.
Source:
Ground water 2018 v.56 no.5 pp. 816-822
ISSN:
0017-467X
Subject:
groundwater; groundwater flow,   etc   ; geometry; hydraulic conductivity; lakes; models;     Show all 6 Subjects
Abstract:
... A simple and fast treatment of hydrogeologic features with irregularly shaped boundaries in two‐dimensional analytic element groundwater flow models is presented. The star domain shapes of the features are restricted to closed shapes represented as smooth and continuous single‐valued functions of distance from a focus point, rˆθ. The element can be used to treat a variety of boundary and continuit ...
DOI:
10.1111/gwat.12649

17. Understanding the groundwater-level fluctuations for better management of groundwater resource: A case in the Johannesburg region

Author:
Abiye, Tamiru; Masindi, Khuliso; Mengistu, Haile; Demlie, Molla
Source:
Groundwater for sustainable development 2018 v.7 pp. 1-7
ISSN:
2352-801X
Subject:
groundwater; groundwater extraction,   etc   ; anthropogenic activities; mining; rain; sustainable development;     Show all 6 Subjects
Abstract:
... Successful management of groundwater resources depends on the available resource and degree of groundwater fluctuations. Fluctuation of groundwater-level is associated with both anthropogenic activities such as over pumping, and natural processes, primarily through reduction in recharge. It is difficult to identify the causes of fluctuations only by observing short-term water-level records. Theref ...
DOI:
10.1016/j.gsd.2018.02.004

18. Random walk path solution to groundwater flow dynamics in highly heterogeneous aquifers

Author:
Nan, Tongchao; Wu, Jichun
Source:
Journal of hydrology 2018 v.563 pp. 543-559
ISSN:
0022-1694
Subject:
groundwater; groundwater flow,   etc   ; algorithms; aquifers; differential equation; hydrodynamics; system optimization;     Show all 7 Subjects
Abstract:
... Random walk path methods including walk on spheres and walk on rectangles have been used to solve elliptic and parabolic partial differential equations (PDEs). These methods are able to provide not only the pointwise solutions to the linear PDEs but also contributions of boundaries and all source/sink terms as an analytical solution does. However, due to difficulty in dealing with heterogeneity, t ...
DOI:
10.1016/j.jhydrol.2018.05.008

19. Markov based transition probability geostatistics in groundwater applications: assumptions and limitations

Author:
Langousis, Andreas; Kaleris, Vassilios; Kokosi, Angeliki; Mamounakis, George
Source:
Stochastic environmental research and risk assessment 2018 v.32 no.7 pp. 2129-2146
ISSN:
1436-3240
Subject:
groundwater; groundwater flow,   etc   ; aquifers; geostatistics; models; stochastic processes; uncertainty;     Show all 7 Subjects
Abstract:
... Markov based transition probability geostatistics (MTPG) for categorical variables, as implemented by the methodological framework introduced by Carle and Fogg (Math Geol 29(7):891–918, 1997) and extended thereafter, have been extensively applied for the three-dimensional (3D) statistical representation of hydrofacies in real-world aquifers, and the conditional simulation of 3D lithologies for gro ...
DOI:
10.1007/s00477-017-1504-y

20. Simulation of groundwater exchange between an unconfined aquifer and a discrete fracture network with laminar and turbulent flows

Author:
Fang, Hong; Zhu, Jianting
Source:
Journal of hydrology 2018 v.562 pp. 468-476
ISSN:
0022-1694
Subject:
groundwater; groundwater flow,   etc   ; Reynolds number; aquifers; equations; turbulent flow;     Show all 6 Subjects
Abstract:
... In this study, a new approach is developed to simulate groundwater flow through both an overlying unconfined aquifer and an underlying discrete fracture network. The groundwater exchange between the aquifer and the fracture network, including magnitude and direction, is explicitly simulated based on the mass conservation, which depends on a variety of parameters related to flow and network charact ...
DOI:
10.1016/j.jhydrol.2018.05.022