U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject "groundwater" Remove constraint Subject: "groundwater"
Start Over

Search

43,725  Search Results

« Previous | 1 - 20 of 43,725 |
Number of results to display per page

Search Results

1. Perfluoroalkyl acid transformation and mitigation by nNiFe-activated carbon nanocomposites in steady-state flow column studies

Author:
Mahsa Modiri-Gharehveran; Younjeong Choi; Jenny E. Zenobio; Linda S. Lee
Source:
Journal of environmental sciences (China) 2023 v.127 pp. 678-687
ISSN:
1001-0742
Subject:
groundwater; groundwater contamination,   etc   ; bicarbonates; carbon; fluorides; nanocomposites; perfluorocarbons; perfluorooctane sulfonic acid; remediation; sorption; sulfonates; China;     Show all 12 Subjects
Abstract:
... The ongoing contamination of groundwater with per- and polyfluoroalkyl substances (PFAS) has resulted in a global and rapidly growing interest in PFAS groundwater remediation. Preferred technologies that lead to PFAS destruction are often limited by not addressing all PFAS, being energy-intensive or not being suited for in-situ application. We developed nNiFe-activated carbon (AC) nanocomposites a ...
DOI:
10.1016/j.jes.2022.06.040

2. Environmental Mn(II) enhances the activity of dissimilatory arsenate-respiring prokaryotes from arsenic-contaminated soils

Author:
Yan Wu; Weiwei Wu; Yifan Xu; Yanxia Zuo; Xian-Chun Zeng
Source:
Journal of environmental sciences (China) 2023 v.125 pp. 582-592
ISSN:
1001-0742
Subject:
groundwater,   etc   ; Bacillus (bacteria); arsenic; genes; oxidoreductases; prokaryotic cells; China;     Show all 7 Subjects
Abstract:
... Many investigations suggest that dissimilatory arsenate-respiring prokaryotes (DARPs) play a key role in stimulating reductive mobilization of As from solid phase into groundwater, but it is not clear how environmental Mn(II) affects the DARPs-mediated reductive mobilization of arsenic. To resolve this issue, we collected soil samples from a realgar tailings-affected area. We found that there were ...
DOI:
10.1016/j.jes.2022.03.013

3. A comparative study of the sorption of O-PAHs and PAHs onto soils to understand their transport in soils and groundwater

Author:
W. Almouallem; J. Michel; S. Dorge; C. Joyeux; G. Trouvé; D. Le Nouen
Source:
Journal of environmental sciences (China) 2023 v.124 pp. 61-75
ISSN:
1001-0742
Subject:
groundwater,   etc   ; comparative study; dibenzofuran; fluorenes; industrialization; ionic strength; liquids; organic carbon; risk; soil; sorption; China;     Show all 12 Subjects
Abstract:
... Polycyclic aromatic hydrocarbons (PAHs) and their oxygenated derivates (O-PAHs) are identified in soils and groundwater of industrialized sites and contribute to the risk for Humans and the Environment. Nevertheless, data are scarce in literature concerning their retention and transfer in soils and no soil - water partition coefficients are available for these compounds. Sorption of two PAHs, fluo ...
DOI:
10.1016/j.jes.2021.11.001

4. Organophosphate pesticides an emerging environmental contaminant: Pollution, toxicity, bioremediation progress, and remaining challenges

Author:
Himanshu Mali; Chandni Shah; B.H. Raghunandan; Anil S. Prajapati; Darshan H. Patel; Ujjval Trivedi; R.B. Subramanian
Source:
Journal of environmental sciences (China) 2023 v.127 pp. 234-250
ISSN:
1001-0742
Subject:
groundwater,   etc   ; acute exposure; bioremediation; biosensors; biotechnology; decontamination; environmental health; humans; permeability; plant growth; pollution; soil; toxicity; China;     Show all 14 Subjects
Abstract:
... Organophosphates (OPs) are an integral part of modern agriculture; however, due to overexploitation, OPs pesticides residues are leaching and accumulating in the soil, and groundwater contaminated terrestrial and aquatic food webs. Acute exposure to OPs could produce toxicity in insects, plants, animals, and humans. OPs are known for covalent inhibition of acetylcholinesterase enzyme in pests and ...
DOI:
10.1016/j.jes.2022.04.023

5. Physical limitations and optimization of permeable adsorbing barrier for long-term groundwater treatment

Author:
V. A. Kutsepalov; L. V. Matveev
Source:
International journal of environmental science and technology 2022 v.19 no.6 pp. 5109-5118
ISSN:
1735-1472
Subject:
groundwater; groundwater treatment,   etc   ; models; permeability;     Show all 4 Subjects
Abstract:
... A model of contaminant transport determined by infiltrating groundwater in geologic medium with adsorbing barrier is proposed, in which it is shown that requirements to the barrier permeability make a restriction on its adsorbing properties. Basing on the solution for contaminant concentration a restriction on minimal barrier’s length needed for treatment of contaminated region and characteristic ...
DOI:
10.1007/s13762-021-03477-x

6. Simultaneous Estimation of a Contaminant Source and Hydraulic Conductivity Field by Combining an Iterative Ensemble Smoother and Sequential Gaussian Simulation

Author:
Simin Jiang; Ruicheng Zhang; Jinbing Liu; Xuemin Xia; Xianwen Li; Maohui Zheng
Source:
Water 2022 v.14 no.5 pp. -
ISSN:
2073-4441
Subject:
groundwater; groundwater contamination,   etc   ; geostatistics; hydraulic conductivity;     Show all 4 Subjects
Abstract:
... Joint estimation of groundwater contaminant source characteristics and hydraulic conductivity is of great significance for contaminant transport models in heterogeneous subsurface media. As for accurate characterization of hydraulic conductivities, both geostatistical modeling and groundwater inverse modeling are alternative approaches. In this study, an iterative ensemble smoother and sequential ...
DOI:
10.3390/w14050757

7. Where to drill next? A dual-weighted approach to adaptive optimal design of groundwater surveys

Author:
Mikkel B. Lykkegaard; Tim J. Dodwell
Source:
Advances in water resources 2022 v.164 pp. 104219
ISSN:
0309-1708
Subject:
groundwater; groundwater flow,   etc   ; Bayesian theory; uncertainty;     Show all 4 Subjects
Abstract:
... We present a novel approach to adaptive optimal design of groundwater surveys – a methodology for choosing the location of the next monitoring well. Our dual-weighted approach borrows ideas from Bayesian Optimisation and goal-oriented error estimation to propose the next monitoring well, given that some data is already available from existing wells. Our method is distinct from other optimal design ...
DOI:
10.1016/j.advwatres.2022.104219

8. Modeling, simulation and analysis of groundwater flow captured by the horizontal reactive media well using the cell-based smoothed radial point interpolation method

Author:
Wen Li; Blossom Nwedo Nzeribe; G.R. Liu; Guangming Yao; Michelle Crimi; Kalani Rubasinghe; Craig Divine; Jeff Mcdonough; Jack Wang
Source:
Advances in water resources 2022 v.160 pp. 104089
ISSN:
0309-1708
Subject:
groundwater; groundwater contamination; groundwater flow,   etc   ; computer software; finite element analysis; models; risk;     Show all 7 Subjects
Abstract:
... The Horizontal Reactive Media Treatment (HRX) well is a novel technology for in situ treatment of contaminated groundwater. The most significant technical performance risk associated with field-scale implementation of the HRX well is the potential for water to bypass the well untreated. Therefore, the groundwater capture simulation plays a very important role in the design of the HRX well. We buil ...
DOI:
10.1016/j.advwatres.2021.104089

9. In Situ Remediation of Arsenic-Contaminated Groundwater by Injecting an Iron Oxide Nanoparticle-Based Adsorption Barrier

Author:
Sadjad Mohammadian; Hadi Tabani; Zahra Boosalik; Amir Asadi Rad; Beate Krok; Andreas Fritzsche; Kamal Khodaei; Rainer U. Meckenstock
Source:
Water 2022 v.14 no.13 pp. -
ISSN:
2073-4441
Subject:
groundwater; groundwater contamination; groundwater extraction,   etc   ; adsorption; aquifers; arsenic; cost effectiveness; groundwater flow; iron; iron oxides; longevity; models; remediation; sand;     Show all 14 Subjects
Abstract:
... Arsenic contamination of groundwater occurs due to both geogenic and anthropogenic processes. Conventional arsenic remediation techniques require extraction of groundwater into pump-and-treat systems, which are expensive and require long operational times. Hence, there is a need for cost-effective remediation. In this study, we assessed and validated the in situ remediation of arsenic contaminatio ...
DOI:
10.3390/w14131998

10. Estimating future (next-month’s) spatial groundwater response from current regional pumping and precipitation rates

Author:
Tatas; Hone-Jay Chu; Thomas J. Burbey
Source:
Journal of hydrology 2022 v.604 pp. 127160
ISSN:
0022-1694
Subject:
groundwater; groundwater extraction,   etc   ; drawdown; models; rain; Taiwan;     Show all 6 Subjects
Abstract:
... The equilibrium of natural groundwater systems can be disrupted by excessive withdrawal. Accurate estimation of groundwater levels is needed to assess water-level fluctuations caused by groundwater withdrawal and seasonal distributions of precipitation. This study aims to estimate the next-month’s groundwater levels using monthly real-world data that includes rainfall, electricity-estimated pumpin ...
DOI:
10.1016/j.jhydrol.2021.127160

11. Glacial Melt in the Canadian Rockies and Potential Effects on Groundwater in the Plains Region

Author:
Alfonso Rivera; Angus I. Calderhead
Source:
Water 2022 v.14 no.5 pp. -
ISSN:
2073-4441
Subject:
groundwater; groundwater flow; groundwater recharge,   etc   ; aquifers; glaciers; ice; mountains; snowmelt; Alberta; Rocky Mountain region;     Show all 10 Subjects
Abstract:
... The prevailing concern in the Western Canadian Plains is that glaciers from the eastern Canadian Rocky Mountains (CRM) are losing mass, thus affecting groundwater recharge in the Plains. The generally accepted hypothesis is that those glaciers are the geological source of groundwater for aquifers located in the Plains. The aquifers located in this region, close to the eastern part of the Rockies, ...
DOI:
10.3390/w14050733

12. Comprehensive review of groundwater scarcity, stress and sustainability index-based assessment

Author:
Haseeb Akbar; Pariyapat Nilsalab; Thapat Silalertruksa; Shabbir H. Gheewala
Source:
Groundwater for sustainable development 2022 v.18 pp. 100782
ISSN:
2352-801X
Subject:
groundwater; groundwater extraction,   etc   ; food security; freshwater; sustainable development;     Show all 5 Subjects
Abstract:
... Groundwater, the world's largest freshwater resource, is critically important for global food security. Excessive groundwater extraction has led to issues such as groundwater sustainability, scarcity, and stress; various indices have been developed for assessing them. The selection of the right index for the assessment is very important. Therefore, the existing index-based groundwater scarcity str ...
DOI:
10.1016/j.gsd.2022.100782

13. Fault-controlled springs: A review

Author:
Robin Keegan-Treloar; Dylan J. Irvine; S. Cristina Solórzano-Rivas; Adrian D. Werner; Eddie W. Banks; Matthew J. Currell
Source:
Earth-science reviews 2022 v.230 pp. 104058
ISSN:
0012-8252
Subject:
groundwater; groundwater flow,   etc   ; freshwater; humans; spring; springs (water);     Show all 6 Subjects
Abstract:
... Springs sustain groundwater-dependent ecosystems and provide freshwater for human use. Springs often occur because faults modify groundwater flow pathways leading to discharge from aquifers with sufficiently high pressure. This study reviews the key characteristics and physical processes, field investigation techniques, modelling approaches and management strategies for fault-controlled spring sys ...
DOI:
10.1016/j.earscirev.2022.104058

14. Analytical solution for transport of pollutant from time-dependent locations along groundwater

Author:
Dilip Kumar Jaiswal; Naveen Kumar; Raja Ram Yadav
Source:
Journal of hydrology 2022 v.610 pp. 127826
ISSN:
0022-1694
Subject:
groundwater; groundwater flow,   etc   ; air; equations; pollutants; river flow;     Show all 6 Subjects
Abstract:
... The present work derives analytical solutions of advection–dispersion equation (ADE) with temporal coefficients, and a pollutant’s point source moving linearly along the axis of a one-dimensional semi-infinite domain. The source is considered a varying and a uniform pulse source, respectively. The dispersion of pollutant originating from a varying pulse source may be supposed to occur along ground ...
DOI:
10.1016/j.jhydrol.2022.127826

15. Evaluating configuration of dual unit ceramic filter for arsenic removal from highly contaminated groundwater

Author:
Md. Shafiquzzaman; Husnain Haider
Source:
Journal of environmental management 2022 v.319 pp. 115664
ISSN:
0301-4797
Subject:
groundwater; groundwater contamination,   etc   ; arsenic; ceramics; environmental management; oxidation;     Show all 6 Subjects
Abstract:
... Iron (Fe) amended dual unit ceramic filters (DUCF) can be a viable treatment option for arsenic (As) removal from highly contaminated groundwater. The present field study investigated the effect of filter configurations, the separate-unit dual filter (SUDF) and connect-unit dual filter (CUDF), on As removal from groundwater having As concentration of 475 μg/L. SUDF was configured by placing 1st an ...
DOI:
10.1016/j.jenvman.2022.115664

16. Using groundwater noble gas measurements to confirm paleorecharge hypotheses at Pahute Mesa, Nevada National Security Site, Nevada, USA

Author:
Ate Visser; Edward Kwicklis; Irene Farnham; Andrew F. B. Tompson; Ronald L. Hershey
Source:
Hydrogeology journal 2022 v.30 no.1 pp. 203-220
ISSN:
1431-2174
Subject:
groundwater; groundwater flow; groundwater recharge,   etc   ; Pleistocene epoch; geochemistry; inventories; oases; runoff; soil air; temperature; Nevada;     Show all 11 Subjects
Abstract:
... Pahute Mesa (Nevada, USA) was the site of 85 underground nuclear tests between 1965 and 1992 whose residual radiochemical inventory poses a contaminant threat to local groundwater resources. To assess the fate and transport of these radionuclides in groundwater, several geochemical studies, including this one, have been conducted to understand long-term groundwater flow patterns at, and downgradie ...
DOI:
10.1007/s10040-021-02428-7

17. Attention U-Net as a surrogate model for groundwater prediction

Author:
Maria Luisa Taccari; Jonathan Nuttall; Xiaohui Chen; He Wang; Bennie Minnema; Peter K. Jimack
Source:
Advances in water resources 2022 v.163 pp. 104169
ISSN:
0309-1708
Subject:
groundwater; groundwater flow,   etc   ; aquifers; finite element analysis; prediction;     Show all 5 Subjects
Abstract:
... Numerical simulations of groundwater flow are used to analyze and predict the response of an aquifer system to its change in state by approximating the solution of the fundamental groundwater physical equations. The most used and classical methodologies, such as Finite Difference (FD) and Finite Element (FE) Methods, use iterative solvers which are associated with high computational cost. This stu ...
DOI:
10.1016/j.advwatres.2022.104169

18. Delineating the groundwater protection zone (GPZ) around a water supply plant in Bekasi, West Java, Indonesia

Author:
Sadhu Zukhruf Janottama; Karlina Triana
Source:
Groundwater for sustainable development 2022 v.17 pp. 100762
ISSN:
2352-801X
Subject:
groundwater; groundwater extraction; groundwater flow,   etc   ; basins; confined aquifer; industry; sustainable development; water management; water supply; Indonesia;     Show all 10 Subjects
Abstract:
... The escalating community demands for water supply in urban areas lead to overexploitation on groundwater and worsening the condition of the resources. These exploitation activities will affect the quality, quantity, and continuity (QQC) of groundwater, especially those that are produced as the resource for the water supply industry. The study area is a water supply industry plant located in Bekasi ...
DOI:
10.1016/j.gsd.2022.100762

19. Off limit?—Assessments of groundwater management in the Grünstadt area (Rhineland-Palatinate)

Author:
Frank Bitzer; Christoph Baumeister; Jochen Kampf; Martin Schykowski
Source:
Grundwasser 2022 v.27 no.1 pp. 3-14
ISSN:
1430-483X
Subject:
groundwater; groundwater flow; groundwater recharge,   etc   ; aquifers; hydrochemistry; models; soil water balance; subsidence; water management; water supply;     Show all 10 Subjects
Abstract:
... In the Grünstadt area the water supply is realised by mostly local pumping wells in the Bunter aquifer system. The Bunter has a spatially complex structure due to the geological-tectonic setting. In combination with estimations to the groundwater flow direction and groundwater age, the area can be split into balanceable sub-areas.Data of groundwater levels and hydrochemistry indicate significant c ...
DOI:
10.1007/s00767-021-00505-y

20. Application of analytical hierarchy process and integrated fuzzy-analytical hierarchy process for mapping potential groundwater recharge zone using GIS in the arid areas of Ewaso Ng'iro – Lagh Dera Basin, Kenya

Author:
Tabitha Wambui Githinji; Edwin Wandubi Dindi; Zacharia Njuguna Kuria; Daniel Ochieng Olago
Source:
HydroResearch 2022 v.5 pp. 22-34
ISSN:
2589-7578
Subject:
groundwater; groundwater recharge,   etc   ; alluvium; basins; freshwater; highlands; lithology; Kenya;     Show all 8 Subjects
Abstract:
... The demand for freshwater has continuously increased in the arid areas of Ewaso Ng'iro – Lagh Dera basin, Kenya. This study aimed to and mapped areas of potential groundwater recharge in the basin by integrating factors that influence groundwater recharge using Analytical Hierarchical Process, and Fuzzy-Analytical Hierarchical Process in ArcGIS. The results of this study are presented in form of m ...
DOI:
10.1016/j.hydres.2021.11.001