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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. Combined recharge: A method to prevent ground settlement induced by redevelopment of recharge wells

Author:
Zeng, Chao-Feng; Zheng, Gang; Xue, Xiu-Li; Mei, Guo-Xiong
Source:
Journal of hydrology 2019 v.568 pp. 1-11
ISSN:
0022-1694
Subject:
groundwater recharge,   etc   ; dewatering; soil movement; wells;     Show all 4 Subjects
Abstract:
... Artificial recharge is an effective way to minimize dewatering-induced ground settlements in deep excavation. To ensure the success of a long-term recharge, it is necessary to redevelop recharge wells (i.e., pumping) periodically to prevent well clogging. Field measurements show that ground settlements will occur during the well redevelopment. This paper proposed a method referred to as the combin ...
DOI:
10.1016/j.jhydrol.2018.10.051

3. Calibration and validation of a novel passive sampling device for the time integrative monitoring of per- and polyfluoroalkyl substances (PFASs) and precursors in contaminated groundwater

Author:
Kaserzon, Sarit L.; Vijayasarathy, Soumini; Bräunig, Jennifer; Mueller, Linus; Hawker, Darryl W.; Thomas, Kevin V.; Mueller, Jochen F.
Source:
Journal of hazardous materials 2019 v.366 pp. 423-431
ISSN:
0304-3894
Subject:
groundwater; groundwater contamination,   etc   ; fire fighting; foams; monitoring; perfluorooctane sulfonic acid; polyethylene; porous media; samplers;     Show all 9 Subjects
Abstract:
... Per-and polyfluoroalkyl substances (PFASs) as key components in aqueous film forming foams (AFFF) have led to growing incidences of environmental contamination. The aim of this study was to investigate a novel diffusion based passive sampling device comprising of microporous polyethylene (PE) for the long-term time-integrative monitoring of PFASs in groundwater systems. PE passive samplers (PEs) w ...
DOI:
10.1016/j.jhazmat.2018.12.010

4. Statistical modelling of groundwater contamination monitoring data: A comparison of spatial and spatiotemporal methods

Author:
McLean, M.I.; Evers, L.; Bowman, A.W.; Bonte, M.; Jones, W.R.
Source:
The Science of the total environment 2019 v.652 pp. 1339-1346
ISSN:
0048-9697
Subject:
groundwater; groundwater contamination,   etc   ; data collection; gasoline; monitoring; receptors; risk; statistical models; water quality;     Show all 9 Subjects
Abstract:
... Field monitoring of groundwater contamination plumes is an important component of managing risks for downgradient receptors and remedial strategies that rely on monitored natural attenuation. Collection of groundwater quality data can however take a considerable effort and be associated with high cost. Here, we investigated the relative merits of analyzing groundwater quality data using spatial co ...
DOI:
10.1016/j.scitotenv.2018.10.231

5. The impact of iron nanoparticles on technetium-contaminated groundwater and sediment microbial communities

Author:
Newsome, Laura; Morris, Katherine; Cleary, Adrian; Masters-Waage, Nicholas Karl; Boothman, Christopher; Joshi, Nimisha; Atherton, Nick; Lloyd, Jonathan R.
Source:
Journal of hazardous materials 2019 v.364 pp. 134-142
ISSN:
0304-3894
Subject:
groundwater; groundwater contamination,   etc   ; Firmicutes; acetates; anaerobic conditions; bacteria; iron; microbial communities; nanoparticles; sediments; sulfates; technetium;     Show all 12 Subjects
Abstract:
... Iron nanoparticles are a promising new technology to treat contaminated groundwater, particularly as they can be engineered to optimise their transport properties. Technetium is a common contaminant at nuclear sites and can be reductively scavenged from groundwater by iron(II). Here we investigated the potential for a range of optimised iron nanoparticles to remove technetium from contaminated gro ...
DOI:
10.1016/j.jhazmat.2018.10.008

6. 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

7. 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

8. 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

9. Ground surface response to continuous compaction of aquifer system in Tehran, Iran: Results from a long-term multi-sensor InSAR analysis

Author:
Haghshenas Haghighi, Mahmud; Motagh, Mahdi
Source:
Remote sensing of environment 2019 v.221 pp. 534-550
ISSN:
0034-4257
Subject:
groundwater; groundwater extraction; groundwater flow,   etc   ; airports; aquifers; basins; deformation; interferometry; remote sensing; sediments; subsidence; synthetic aperture radar; time series analysis; water table; Iran;     Show all 15 Subjects
Abstract:
... Most of the developed groundwater basins in Iran are subject to land subsidence hazards resulting from the over-extraction of groundwater. Several areas in Tehran, the capital city and a provincial center in north-central Iran, have been reported to be subsiding at different rates. In this study, we present the results of an Interferometric Synthetic Aperture Radar (InSAR) time series analysis of ...
DOI:
10.1016/j.rse.2018.11.003

10. Vertical mixing with return irrigation water the cause of arsenic enrichment in groundwater of district Larkana Sindh, Pakistan

Author:
Ali, Waqar; Mushtaq, Nisbah; Javed, Tariq; Zhang, Hua; Ali, Kamran; Rasool, Atta; Farooqi, Abida
Source:
Environmental pollution 2019 v.245 pp. 77-88
ISSN:
0269-7491
Subject:
groundwater; groundwater contamination; groundwater recharge,   etc   ; World Health Organization; arsenic; calcite; deuterium; dolomite; environmental quality; geochemistry; hydrochemistry; irrigation water; leaching; mixing; oxygen; seawater; silicates; stable isotopes; weathering; Pakistan;     Show all 20 Subjects
Abstract:
... Stable isotopes ratios (‰) of Hydrogen (δ2H) and Oxygen (δ1⁸O) were used to trace the groundwater recharge mechanism and geochemistry of arsenic (As) contamination in groundwater from four selected sites (Larkana, Naudero, Ghari Khuda Buksh and Dokri) of Larkana district. The stable isotope values of δ2H and δ1⁸O range from 70.78‰ to −56.01‰ and from −10.92‰ to −7.35‰, relative to Vienna Standard ...
DOI:
10.1016/j.envpol.2018.10.103

11. Deep seepage of per- and polyfluoroalkyl substances through the soil of a firefighter training site and subsequent groundwater contamination

Author:
Dauchy, Xavier; Boiteux, Virginie; Colin, Adeline; Hémard, Jessica; Bach, Cristina; Rosin, Christophe; Munoz, Jean-François
Source:
Chemosphere 2019 v.214 pp. 729-737
ISSN:
0045-6535
Subject:
groundwater; groundwater contamination; groundwater flow,   etc   ; aquifers; clay; fire fighters; fire fighting; foams; monitoring; perfluorooctane sulfonic acid; seepage; soil; spring; sulfonic acid; water table; wells;     Show all 16 Subjects
Abstract:
... Per- and polyfluoroalkyl substances (PFASs) are utilized in specific firefighting foams. The objectives of this study were i) to map PFAS distribution in the soil and groundwater of a firefighter training site active for more than 3 decades, ii) to locate the main points of entry of PFASs into the aquifer and iii) to identify which PFASs seeped most deeply into the soil. A total of 44 soil cores a ...
DOI:
10.1016/j.chemosphere.2018.10.003

12. Analysis of Solute Transport from a Source with Finite Leachable Mass

Author:
Neville, Christopher J.; Wang, Xiaomin
Source:
Ground water 2018 v.56 no.6 pp. 1002-1006
ISSN:
0017-467X
Subject:
groundwater,   etc   ; advection; solutes;     Show all 3 Subjects
Abstract:
... A general approach is developed for the analysis of solute transport from a source with a finite initial mass. The approach uses an effective retardation factor to assign the initial mass that can be leached from the source. Demonstration analyses are presented to illustrate the approach with the numerical simulator MT3DMS. For cases that are tractable with analytical solutions, comparisons betwee ...
DOI:
10.1111/gwat.12807

13. Correction to: Hydro-geochemical characteristics of the groundwater resources in the southern part of the Red River’s Delta plain, Vietnam

Author:
Hoang, Hoan V.; Nguyen, Lam V.; Dang, Nhan D.; Wagner, Frank; Pham, Nhan Q.
Source:
Environmental earth sciences 2018 v.77 no.20 pp. 714
ISSN:
1866-6280
Subject:
groundwater,   etc   ; hydrogeochemistry; rivers; Vietnam;     Show all 4 Subjects
Abstract:
... Author would like to make correction in the original publication. ...
DOI:
10.1007/s12665-018-7899-z

14. 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

15. 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

16. 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

17. 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

18. 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

19. 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

20. Challenges in electrochemical remediation of chlorinated solvents in natural groundwater aquifer settings

Author:
Hyldegaard, Bente H.; Jakobsen, Rasmus; Weeth, Eline B.; Overheu, Niels D.; Gent, David B.; Ottosen, Lisbeth M.
Source:
Journal of hazardous materials 2019 v.368 pp. 680-688
ISSN:
0304-3894
Subject:
groundwater; groundwater contamination,   etc   ; anodes; aquifers; carbonates; cast iron; cathodes; corrosion; electrochemistry; hydrochemistry; iron; models; palladium; remediation; sand; solvents; sulfates;     Show all 17 Subjects
Abstract:
... Establishment of electrochemical zones for remediation of dissolved chlorinated solvents in natural settings was studied. An undivided 1D-experimental column set-up was designed for the assessment of the influence of site-extracted contaminated groundwater flowing through a sandy aquifer material, on the execution of laboratory testing. A three-electrode system composed of palladium coated pure ir ...
DOI:
10.1016/j.jhazmat.2018.12.064