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1. Sequential and coupled inversion of horizontal borehole ground penetrating radar data to estimate soil hydraulic properties at the field scale

Author:
Yu, Yi; Weihermüller, Lutz; Klotzsche, Anja; Lärm, Lena; Vereecken, Harry; Huisman, Johan Alexander
Source:
Journal of hydrology 2021 v.596 pp. 126010
ISSN:
0022-1694
Subject:
vadose zone,   etc   ; models; soil water content;     Show all 3 Subjects
Abstract:
... Horizontal borehole ground penetrating radar (GPR) measurements can provide valuable information on soil water content (SWC) dynamics in the vadose zone, and hence show potential to estimate soil hydraulic properties. In this study, the performance of both sequential and coupled inversion workflows to obtain soil hydraulic properties from time-lapse horizontal borehole GPR data obtained during an ...
DOI:
10.1016/j.jhydrol.2021.126010

2. Simulating the migration and species distribution of Cr and inorganic ions from tanneries in the vadose zone

Author:
Guo, Shan-shan; Xu, Yu-hui; Yang, Jin-yan
Source:
Journal of environmental management 2021 v.288 pp. 112441
ISSN:
0301-4797
Subject:
vadose zone,   etc   ; geographical distribution; groundwater; pH; sewage treatment; soil; tanneries;     Show all 7 Subjects
Abstract:
... The pollution in soils and groundwater caused by the tannery have attracted public attention. However, few studies have been done on the migration and species distribution of Cr and coexisting ions produced by tanning in the vadose zone. In this paper, an in-production tannery and a suspended tannery were selected to compare the migration of Cr and other inorganic ions from tanneries in the vadose ...
DOI:
10.1016/j.jenvman.2021.112441

3. History of petroleum disturbance triggering the depth-resolved assembly process of microbial communities in the vadose zone

Author:
Sheng, Yizhi; Liu, Ying; Yang, Juejie; Dong, Hailiang; Liu, Bo; Zhang, Hao; Li, Aiyang; Wei, Yuquan; Li, Guanghe; Zhang, Dayi
Source:
Journal of hazardous materials 2021 v.402 pp. 124060
ISSN:
0304-3894
Subject:
vadose zone,   etc   ; bioremediation; microbial communities; petroleum; soil depth;     Show all 5 Subjects
Abstract:
... Biogeochemical gradient forms in vadose zone, yet little is known about the assembly processes of microbial communities in this zone under petroleum disturbance. This study collected vadose zone soils at three sites with 0, 5, and 30 years of petroleum contamination to unravel the vertical microbial community successions and their assembly mechanisms. The results showed that petroleum hydrocarbons ...
DOI:
10.1016/j.jhazmat.2020.124060

4. Comparison of recharge from drywells and infiltration basins: A modeling study

Author:
Sasidharan, Salini; Bradford, Scott A.; Šimůnek, Jiří; Kraemer, Stephen R.
Source:
Journal of hydrology 2021 v.594 pp. 125720
ISSN:
0022-1694
Subject:
vadose zone,   etc   ; aquifers; clay; computer software; evaporation; groundwater; groundwater recharge; stormwater; water table;     Show all 9 Subjects
Abstract:
... Drywells (DWs) and infiltration basins (IBs) are widely used as managed aquifer recharge (MAR) devices to capture stormwater runoff and recharge groundwater. However, no published research has compared the performance of these two engineered systems under shared conditions. Numerical experiments were conducted on an idealized 2D‐axisymmetric domain using the HYDRUS (2D/3D) software to systematical ...
DOI:
10.1016/j.jhydrol.2020.125720

5. Numerical model development for investigating hydrologic pathways in shallow fluviokarst

Author:
Al Aamery, Nabil; Adams, Ethan; Fox, James; Husic, Admin; Zhu, Junfeng; Gerlitz, Morgan; Agouridis, Carmen; Bettel, Leonie
Source:
Journal of hydrology 2021 v.593 pp. 125844
ISSN:
0022-1694
Subject:
vadose zone,   etc   ; aquifers; basins; bedrock; karsts; model validation; riparian areas; rivers; springs (water); uncertainty; Kentucky;     Show all 11 Subjects
Abstract:
... Karst pathways and fluvial pathways control hydrology in shallow fluviokarst basins, and numerical modelling of fluviokarst is seldom reported. In this study, we developed a combined discrete-continuum fluviokarst numerical model by simulating surface river routing, in-stream swallet sources and sinks, epikarst storage and dynamic transfer, matrix bedrock interactions, and closed conduit phreatic ...
DOI:
10.1016/j.jhydrol.2020.125844

6. Root zone soil moisture estimation with Random Forest

Author:
Carranza, Coleen; Nolet, Corjan; Pezij, Michiel; van der Ploeg, Martine
Source:
Journal of hydrology 2021 v.593 pp. 125840
ISSN:
0022-1694
Subject:
vadose zone,   etc   ; agricultural watersheds; algorithms; models; rhizosphere; soil water; water flow;     Show all 7 Subjects
Abstract:
... Accurate estimates of root zone soil moisture (RZSM) at relevant spatio-temporal scales are essential for many agricultural and hydrological applications. Applications of machine learning (ML) techniques to estimate root zone soil moisture are limited compared to commonly used process-based models based on flow and transport equations in the vadose zone. However, data-driven ML techniques present ...
DOI:
10.1016/j.jhydrol.2020.125840

7. Transport of Cu2+ in Unsaturated Porous Medium with Humic Acid/Iron Oxide Nanoparticle (Fe3O4) Amendment

Author:
Lin, Shanshan; Shi, Mengdi; Wang, Qi; Yang, Junlin; Zhang, Gubin; Liu, Xiangru; Fan, Wei
Source:
Water 2021 v.13 no.2
ISSN:
2073-4441
Subject:
vadose zone,   etc   ; Fourier transform infrared spectroscopy; adsorption; groundwater; humic acids; iron oxides; porous media; sand; soil;     Show all 9 Subjects
Abstract:
... Humic acid (HA) and iron oxide (such as Fe₃O₄) nanoparticles are widely distributed in soil, and their complex embedded in soil might affect the transport and fate of Cu²⁺ in the vadose zone, while Cu²⁺ is a serious threat to the underlying groundwater. In this study, we synthesized a composite of Fe₃O₄ nanoparticles coated with HA (HA@NPs) using as an amendment a packed sand matrix in the transpo ...
DOI:
10.3390/w13020200

8. A new foam-based method for the (bio)degradation of hydrocarbons in contaminated vadose zone

Author:
Bouzid, I.; Pino Herrera, D.; Dierick, M.; Pechaud, Y.; Langlois, V.; Klein, P.Y.; Albaric, J.; Fatin-Rouge, N.
Source:
Journal of hazardous materials 2021 v.401 pp. 123420
ISSN:
0304-3894
Subject:
vadose zone,   etc   ; foams; isotropy; oxidation; petroleum; remediation; soil; surfactants; tomography; viscosity;     Show all 10 Subjects
Abstract:
... An innovative foam-based method for Fenton reagents (FR) and bacteria delivery was assessed for the in situ remediation of a petroleum hydrocarbon-contaminated unsaturated zone. The surfactant foam was first injected, then reagent solutions were delivered and propagated through the network of foam lamellae with a piston-like effect. Bench-scale experiments demonstrated the feasibility of the vario ...
DOI:
10.1016/j.jhazmat.2020.123420

9. Passive membrane sampler for assessing VOCs contamination in unsaturated and saturated media

Author:
Liang, Chenju; Chang, Jheng-Shin; Chen, Tzu-Wen; Hou, Yuwen
Source:
Journal of hazardous materials 2021 v.401 pp. 123387
ISSN:
0304-3894
Subject:
vadose zone,   etc   ; dialysis; groundwater; polydimethylsiloxane; soil air; tomography; trichloroethylene; vapors; volatile organic compounds;     Show all 9 Subjects
Abstract:
... Passive sampling (PS) is a method employed to detect volatile organic compounds in groundwater and soil gas. This study attempted to manufacture a polydimethylsiloxane (PDMS) dialysis passive sampler for potential application in detecting trichloroethylene (TCE) in aqueous and gaseous phases. The equilibrium time of the passive sampler was initially determined, followed by multilayer passive sampl ...
DOI:
10.1016/j.jhazmat.2020.123387

10. ANFIS-MOA models for the assessment of groundwater contamination vulnerability in a nitrate contaminated area

Author:
Elzain, Hussam Eldin; Chung, Sang Yong; Park, Kye-Hun; Senapathi, Venkatramanan; Sekar, Selvam; Sabarathinam, Chidambaram; Hassan, Mohamed
Source:
Journal of environmental management 2021 v.286 pp. 112162
ISSN:
0301-4797
Subject:
vadose zone,   etc   ; algorithms; aquifers; environmental management; fuzzy logic; groundwater; groundwater contamination; hydraulic conductivity; land use; nitrates; topographic slope; South Korea;     Show all 12 Subjects
Abstract:
... The enhanced assessment of groundwater contamination vulnerability is necessary for the management and conservation of groundwater resources because groundwater contamination has been much increased continuously in the world by anthropogenic origin. The purpose of this study is to determine the best model among three ANFIS-MOA models (the adaptive neuro-fuzzy inference system (ANFIS) combined with ...
DOI:
10.1016/j.jenvman.2021.112162

11. Inconsistent hydrological trends do not necessarily imply spatially heterogeneous drivers

Author:
Lischeid, Gunnar; Dannowski, Ralf; Kaiser, Knut; Nützmann, Gunnar; Steidl, Jörg; Stüve, Peter
Source:
Journal of hydrology 2021 v.596 pp. 126096
ISSN:
0022-1694
Subject:
vadose zone,   etc   ; climate change; data collection; groundwater flow; groundwater recharge; lakes; land use change; time series analysis; wetlands; Germany;     Show all 10 Subjects
Abstract:
... Trend analyses are widely used to check for climate change effects on hydrological systems. However, often inconsistent patterns have been found, that is, non-significant as well as significant but opposing trends in the same data set. These inconsistencies have often been ascribed to local, mostly anthropogenic effects like wetland draining or land use change. In this study local effects were sub ...
DOI:
10.1016/j.jhydrol.2021.126096

12. Real-time soil and groundwater monitoring via spatial and temporal resolution of biogeochemical potentials

Author:
Sale, Tom; Gallo, Sam; Askarani, Kayvan Karimi; Irianni-Renno, Maria; Lyverse, Mark; Hopkins, Harley; Blotevogel, Jens; Burge, Scott
Source:
Journal of hazardous materials 2021 v.408 pp. 124403
ISSN:
0304-3894
Subject:
vadose zone,   etc   ; biodegradation; direct contact; groundwater; methanogens; microbial communities; oil and gas industry; petroleum; soil air; water quality; water table;     Show all 11 Subjects
Abstract:
... Oxidation-reduction potentials (ORP) govern the transformation of organic compounds in water and soils. Standard methods for measurements of ORPs in subsurface setting are deeply flawed due to heterogeneous samples from wells, failure to capture weakly poised redox couples, and biases with ex-situ measurements. In this study, we developed a real-time in-situ ORP sensor system that continuously mea ...
DOI:
10.1016/j.jhazmat.2020.124403

13. Sulfonamide antibiotics in groundwater and their migration in the vadose zone: A case in a drinking water resource

Author:
Zuo, Rui; Liu, Xin; Zhang, Qianru; Wang, Jinsheng; Yang, Jie; Teng, Yanguo; Chen, Xiaojuan; Zhai, Yuanzheng
Source:
Ecological engineering 2021 v.162 pp. 106175
ISSN:
0925-8574
Subject:
vadose zone,   etc   ; adsorption; ammonia; clay fraction; groundwater; iron; manganese; pH; particle size; risk; sand fraction; sulfamethazine; sulfamethoxazole; China;     Show all 14 Subjects
Abstract:
... Vadose zone is an important channel for sulfonamide contamination into groundwater, and the processes of adsorption and migration in the vadose zone are complicated. In this study, we focused on three sulfonamide antibiotics (sulfamethoxazole, sulfamethazine and sulfamethoxypyridazine) in the groundwater of Limin drinking water resource in northeastern China and assessed their migration potential ...
DOI:
10.1016/j.ecoleng.2021.106175

14. Critical review of effluent dissolved organic nitrogen removal by soil/aquifer-based treatment systems

Author:
Gharoon, Niloufar; Pagilla, Krishna R.
Source:
Chemosphere 2021 v.269 pp. 129406
ISSN:
0045-6535
Subject:
vadose zone,   etc   ; aquifers; biodegradation; disinfection; dissolved organic nitrogen; groundwater; groundwater recharge; human health; microbial communities; soil types; sorption; temperature; wastewater;     Show all 13 Subjects
Abstract:
... Soil/aquifer-based treatment systems improve wastewater effluent quality by removing trace contaminants in the soil and/or aquifer during groundwater recharge. This paper critically reviews these systems with a focus on removing nitrogen, particularly low levels of dissolved organic nitrogen (DON) present in the wastewater effluent. DON in wastewater effluent is a concern because of its contributi ...
DOI:
10.1016/j.chemosphere.2020.129406

15. Analytical Solutions of Vertical Airflow in an Unconfined Aquifer with Rising or Falling Water Table

Author:
An, Ran; Dong, Pei; Wang, Jun-Zhi; Zhang, Yifan; Song, Xianfang; Wan, Li; Wang, Xu-Sheng
Source:
Water 2021 v.13 no.5
ISSN:
2073-4441
Subject:
vadose zone,   etc   ; air; air flow; atmospheric pressure; drainage; models; permeability; porosity; sand; unconfined aquifer; water; water flow; water table;     Show all 13 Subjects
Abstract:
... The rise and fall of the groundwater level can drive air flow in the vadose zone. In turn, the air flow can interact with the water flow. When the unconfined aquifer is covered by a low-permeability media, the coupling of the water flow and the air flow is more obvious. In this study, a conceptual model is established for coupling of air flow and water flow in the vadose zone in response to rapid ...
DOI:
10.3390/w13050625

16. Influencing factors and health risk assessment of polycyclic aromatic hydrocarbons in groundwater in China

Author:
Qiao, Xiaocui; Zheng, Binghui; Li, Xue; Zhao, Xingru; Dionysiou, Dionysios D.; Liu, Yan
Source:
Journal of hazardous materials 2021 v.402 pp. 123419
ISSN:
0304-3894
Subject:
vadose zone,   etc   ; adsorption; carcinogenicity; combustion; dry season; gas chromatography; groundwater; health effects assessments; naphthalene; petroleum; risk; spectrometers; wet season; China;     Show all 14 Subjects
Abstract:
... Polycyclic aromatic hydrocarbons (PAHs) are a group of persistent organic pollutants. This study investigated the occurrence of 16 PAHs in groundwater of representative regions of China (the cities of Lanzhou, Shijiazhuang, and Golmud and in Du’an County) using a gas chromatograph mass spectrometer. The total concentrations of 16 PAHs (∑PAHs) were in the range 0–29.06 μg/L (average: 594.8 ng/L). A ...
DOI:
10.1016/j.jhazmat.2020.123419

17. Influence of thick karst vadose zone on aquifer recharge in karst formations

Author:
Liu, Ruitong; Wang, Jinguo; Zhan, Hongbin; Chen, Zhou; Li, Weijian; Yang, Dong; Zheng, Shiyu
Source:
Journal of hydrology 2021 v.592 pp. 125791
ISSN:
0022-1694
Subject:
vadose zone,   etc   ; groundwater; groundwater recharge; infiltration rate; karsts; mathematical models; saturated flow; springs (water); surveys; unconfined aquifer;     Show all 10 Subjects
Abstract:
... Vadose zone has been proven as an essential buffer zone for aquifer recharge. However, most previous researches associated with vadose zone influence of groundwater recharge concern granular porous media aquifers. Despite of the massive karst formations on surface of earth, the role of karst vadose zone on affecting recharge to the underneath karst aquifer is largely unknown. The objective of this ...
DOI:
10.1016/j.jhydrol.2020.125791

18. Inverse modeling towards parameter estimation of the nonlinear soil hydraulic functions using developed multistep outflow procedure

Author:
Bahrami, Amir; Aghamir, Fateme; Bahrami, Mehdi; Khodaverdiloo, Habib
Source:
Journal of hydrology 2020 v.590 pp. 125446
ISSN:
0022-1694
Subject:
vadose zone,   etc   ; algorithms; cost effectiveness; equations; models; tensiometers;     Show all 6 Subjects
Abstract:
... Modeling and monitoring vadose zone processes have a key role to effectively identify and solve important emerging issues in hydrology and related disciplines. However, major gaps and challenges remain concerning the further conceptualization of the zone complexities and parameterization of relevant models. Consequently, the main focus of this investigation was to establish a modern developed vers ...
DOI:
10.1016/j.jhydrol.2020.125446

19. Markovian transport processes in a heterogeneous, variably saturated watershed: A multi-domain spatial Markov model

Author:
Engdahl, Nicholas B.; Bolster, Diogo
Source:
Advances in water resources 2020 v.138 pp. 103555
ISSN:
0309-1708
Subject:
vadose zone,   etc   ; Markov chain; porous media; solutes; water resources; watersheds;     Show all 6 Subjects
Abstract:
... Transport processes in watersheds remain challenging to describe accurately with upscaled models because of their intricate complexities at multiple scales that can lead to multi-modal, non-Fickian breakthrough curves. One of the recent advances in solute transport modeling has been the Lagrangian spatial Markov model (SMM), which describes transport using velocity increments and models the correl ...
DOI:
10.1016/j.advwatres.2020.103555

20. Assessing the use of standardized groundwater index for quantifying groundwater drought over the conterminous US

Author:
Guo, Mengshen; Yue, Weifeng; Wang, Tiejun; Zheng, Nengzhan; Wu, Lijun
Source:
Journal of hydrology 2021 v.598 pp. 126227
ISSN:
0022-1694
Subject:
vadose zone,   etc   ; ; atmospheric precipitation; climate; drought; groundwater; groundwater extraction; groundwater flow; humans; hysteresis; irrigated farming; lithology; observational studies; resource management; soil; water table; Georgia; Massachusetts; Oklahoma;     Show all 19 Subjects
Abstract:
... Groundwater drought is a drought phenomenon caused by the decrease in groundwater level or groundwater storage under natural and anthropogenic disturbances (e.g., climate variability/change and groundwater abstraction). Due to the complexity of groundwater flow systems and the difficulty in obtaining direct observational data related to groundwater resources, it remains challenging to characterize ...
DOI:
10.1016/j.jhydrol.2021.126227