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1. Transient evaluation of a soil-borehole thermal energy storage system

Author:
Başer, Tuğçe; McCartney, John S.
Source:
Renewable energy 2020 v.147 pp. 2582-2598
ISSN:
0960-1481
Subject:
vadose zone,   etc   ; bedrock; heat exchangers; heat transfer; mathematical models; phase transition; renewable energy sources; saturated conditions; soil; temperature; thermal conductivity; thermal energy; thermistors; vapors; water flow; water table; California;     Show all 17 Subjects
Abstract:
... This study focuses on the simulation of transient ground temperatures in a field-scale soil-borehole thermal energy storage (SBTES) system in San Diego, California. The SBTES system consists of an array of thirteen 15 m-deep borehole heat exchangers installed in conglomerate bedrock at a spacing of approximately 1.5 m. Heat collected from solar thermal panels was injected into the SBTES system ove ...
DOI:
10.1016/j.renene.2018.11.012

2. The role of deep vadose zone water in tree transpiration during drought periods in karst settings – Insights from isotopic tracing and leaf water potential

Author:
Carrière, Simon Damien; Martin-StPaul, Nicolas K.; Cakpo, Coffi Belmys; Patris, Nicolas; Gillon, Marina; Chalikakis, Konstantinos; Doussan, Claude; Olioso, Albert; Babic, Milanka; Jouineau, Arnaud; Simioni, Guillaume; Davi, Hendrik
Source:
The Science of the total environment 2020 v.699 pp. 134332
ISSN:
0048-9697
Subject:
vadose zone,   etc   ; Abies alba; Fagus sylvatica; Quercus ilex; branches; drought; forests; hydrologic cycle; isotope labeling; isotopes; karsts; leaf water potential; models; monitoring; soil; summer; transpiration; trees; water resources; water stress; xylem;     Show all 21 Subjects
Abstract:
... Karst environments are unusual because their dry, stony and shallow soils seem to be unfavorable to vegetation, and yet they are often covered with forests. How can trees survive in these environments? Where do they find the water that allows them to survive? This study uses midday and predawn water potentials and xylem water isotopes of branches to assess tree water status and the origin of trans ...
DOI:
10.1016/j.scitotenv.2019.134332

3. Editorial of Special Issue “Advances in Groundwater Flow and Solute Transport: Pushing the Hidden Boundary”

Author:
Zhan, Hongbin; Wang, Quanrong; Wen, Zhang
Source:
Water 2019 v.11 no.3
ISSN:
2073-4441
Subject:
vadose zone,   etc   ; groundwater flow; solutes; subsurface flow;     Show all 4 Subjects
Abstract:
... The theme of this special issue is to explore the new territories beyond conventional subsurface flow and transport theories. We have selected 12 articles in this special issue and these articles cover a wide range of problems including (1) Non-Fickian chemical transport in various environments; (2) Non-Darcian flow; (3) Flow and transport in low-permeability media; (4) Vadose zone process; (5) Re ...
DOI:
10.3390/w11030457

4. A scale‐invariant property of the water retention curve in weakly heterogeneous vadose zones

Author:
Severino, Gerardo; De Bartolo, Samuele
Source:
Hydrological processes 2019 v.33 no.7 pp. 1032-1039
ISSN:
0885-6087
Subject:
vadose zone,   etc   ; equations; hydraulic conductivity; monitoring; soil pore system;     Show all 5 Subjects
Abstract:
... Abrupt changes of hydraulic properties in a vadose zone are modelled within a stochastic framework, which regards the saturated conductivity and parameters related to the distribution of soil pores as stationary, log‐normally distributed, random space functions. As a consequence, flow variables become random fields, and we aim at deriving an effective Richards equation. To obtain the latter, we ad ...
DOI:
10.1002/hyp.13381

5. Laboratory-scale experimental and modelling investigations of 222Rn profiles in chemically heterogeneous LNAPL contaminated vadose zones

Author:
Cohen, Grégory J.V.; Bernachot, Isabelle; Su, Danyang; Höhener, Patrick; Mayer, K. Ulrich; Atteia, Olivier
Source:
The Science of the total environment 2019 v.681 pp. 456-466
ISSN:
0048-9697
Subject:
vadose zone,   etc   ; laboratory experimentation; mathematical models; monitoring; nonaqueous phase liquids; porous media; radionuclides; radon; surveys;     Show all 9 Subjects
Abstract:
... The potential of LNAPL delineation by 222Rn soil-gas monitoring in a chemically heterogeneous vadose zone was investigated in this study based on laboratory (batch and columns) experiments and numerical modelling. An enhanced version of the MIN3P reactive transport code was used to simulate Rn transport in both uncontaminated and NAPL-contaminated vadose zones and results were validated against an ...
DOI:
10.1016/j.scitotenv.2019.05.023

6. Axisymmetric Modeling Using MODFLOW‐USG

Author:
Bedekar, Vivek; Scantlebury, Leland; Panday, Sorab
Source:
Ground water 2019 v.57 no.5 pp. 772-777
ISSN:
0017-467X
Subject:
vadose zone,   etc   ; aquifers; basins; groundwater; hydrologic models; saltwater intrusion; simulation models; solutes;     Show all 8 Subjects
Abstract:
... Axisymmetric groundwater models are used for simulating radially symmetric conditions. Groundwater simulators built specifically to model axisymmetric conditions are most commonly used for simulating aquifer tests. Although some numerical models capable of simulating flow and solute transport that are developed in the cartesian coordinate system framework offer flexibility to simulate axisymmetric ...
DOI:
10.1111/gwat.12861

7. Persistence of chromate in vadose zone and aquifer sediments in Hanford, Washington

Author:
Szecsody, Jim E.; Truex, Mike J.; Qafoku, Nikolla P.; McKinley, James P.; Ivarson, Kristine A.; Di Pietro, Silvina
Source:
The Science of the total environment 2019 v.676 pp. 482-492
ISSN:
0048-9697
Subject:
vadose zone,   etc   ; aquifers; barium; calcium; chromium; crystals; groundwater; iron; leaching; plagioclase; sediments; solubility; Washington (state);     Show all 13 Subjects
Abstract:
... This study of vadose zone and aquifer sediments beneath a former dichromate spill site showed that the persistence of CrVI in the sediments and the large differences in released mass and rate was caused by the dissolution of multiple CrVI surface phases. Vadose zone sediments contained numerous 1 to 10 μm high solubility calcium chromate crystals, with lesser amounts of unidentified phases indicat ...
DOI:
10.1016/j.scitotenv.2019.04.173

8. Assessing perched aquifer vulnerability using modified DRASTIC: a case study of colliery waste in north-east England (UK)

Author:
Moustafa, Mahmoud
Source:
Hydrogeology journal 2019 v.27 no.5 pp. 1837-1850
ISSN:
1431-2174
Subject:
vadose zone,   etc   ; aquifers; case studies; environmental factors; groundwater; hydraulic conductivity; mining; permeability; topography; wastes; England;     Show all 11 Subjects
Abstract:
... DRASTIC is a commonly used approach for delineating areas that are vulnerable to contamination. This study examines the suitability of DRASTIC for evaluating the vulnerability of groundwater inside a colliery spoil-heap to contamination. The standard DRASTIC approach was modified according to the environmental conditions of spoil heaps that introduce contaminants to the environment. The parameter ...
DOI:
10.1007/s10040-019-01932-1

9. Structural control on karst water circulation and speleogenesis in a lithological contact zone: The Bossea cave system (Western Alps, Italy)

Author:
Antonellini, Marco; Nannoni, Alessia; Vigna, Bartolomeo; De Waele, Jo
Source:
Geomorphology 2019
ISSN:
0169-555X
Subject:
vadose zone,   etc   ; Permian period; carbonates; caves; deformation; karsts; rocks; streams; surveys; water flow; Alps region; Italy;     Show all 12 Subjects
Abstract:
... Geological surveys, structural mapping, and thin section analysis helped to unravel the speleogenesis and water circulation in the Bossea cave (Northern Italy), an unconventional karst system at the contact between carbonates and underlying insoluble rocks. The surveys within the cave and in the surrounding surface outcrops revealed a complex structural setting caused by the coupling of lithologic ...
DOI:
10.1016/j.geomorph.2019.07.019

10. Evaluation of Dissolved Organic Matter Removals through WWT and SAT Using Pilot-Scale and Lab-Scale Reactors

Author:
Takabe, Yugo; Kameda, Ippei; Suzuki, Ryosuke; Nishimura, Fumitake; Kusuda, Yasunari; Phattarapattamawong, Songkeart; Itoh, Sadahiko
Source:
Water, air, and soil pollution 2019 v.230 no.6 pp. 127
ISSN:
0049-6979
Subject:
vadose zone,   etc   ; acids; aquifers; dissolved organic matter; fractionation; hydrophobicity; microbial activity; soil; wastewater treatment; water reuse;     Show all 10 Subjects
Abstract:
... Indirect potable reuse systems, which consist of wastewater treatment (WWT) and soil aquifer treatment (SAT), offer advantages such as their low cost and the underground storage of reuse water. In this study, the dissolved organic matter (DOM) profile of a sequential treatment system (i.e. WWT followed by SAT) was investigated using a pilot-scale SAT reactor. In addition, the biological DOM remova ...
DOI:
10.1007/s11270-019-4182-1

11. The value of simplified models for spin up of complex models with an application to subsurface hydrology

Author:
Erdal, Daniel; Baroni, Gabriele; Sánchez-León, Emilio; Cirpka, Olaf A.
Source:
Computers & geosciences 2019 v.126 pp. 62-72
ISSN:
0098-3004
Subject:
vadose zone,   etc   ; computers; groundwater; groundwater recharge; hydrologic models; mathematical models; seasonal variation; spinning; water table;     Show all 9 Subjects
Abstract:
... Spinning up large-scale coupled surface-subsurface numerical models can be a time and resource consuming task. If an uninformed initial condition is chosen, the spin-up can easily require 20 years of repeated simulations on high-performance computing machines. In this paper we compare the classical approach of starting from a fixed shallow depth to groundwater (here 3 m) with three more informed a ...
DOI:
10.1016/j.cageo.2019.01.014

12. The Effectiveness of Exfiltration Technology to Support Sponge City Objectives

Author:
McBean, Edward; Huang, Gordon; Yang, Aili; Cheng, Huiyan; Wu, Yicheng; Liu, Zheng; Dai, Zhineng; Fu, Haiyan; Bhatti, Munir
Source:
Water 2019 v.11 no.4
ISSN:
2073-4441
Subject:
vadose zone,   etc   ; groundwater; groundwater recharge; planning; storms; stormwater; stormwater management; subsidence; urban areas; watersheds; Canada; China;     Show all 12 Subjects
Abstract:
... Urban stormwater management is essential to improve the management of floodwaters in municipalities in urban areas. However, relying on sponge city options for site planning in an attempt to decrease the impacts of flooding is challenging due to the magnitude of flooding in urban China. The merits of exfiltration technology being used in Canada are described as having significant potential; this t ...
DOI:
10.3390/w11040723

13. Uncertainties in tritium mass balance models for groundwater recharge estimation

Author:
Li, Zhi; Jasechko, Scott; Si, Bingcheng
Source:
Journal of hydrology 2019 v.571 pp. 150-158
ISSN:
0022-1694
Subject:
vadose zone,   etc   ; aquifers; groundwater; groundwater recharge; models; risk assessment; soil water; tritium; uncertainty; China;     Show all 10 Subjects
Abstract:
... Understanding the time that water takes to traverse the vadose zone is important to quantify groundwater recharge rates and to assess the vulnerability of aquifers to contamination. Tritium mass balance models provide measurement-driven estimates of soil water velocities, yet uncertainties embedded in these groundwater recharge estimates are rarely investigated. Here we analyze six >15-m tritium p ...
DOI:
10.1016/j.jhydrol.2019.01.030

14. Improving parameter estimation with an efficient sequential probabilistic collocation-based optimal design method

Author:
Man, Jun; Zheng, Qiang; Wu, Laosheng; Zeng, Lingzao
Source:
Journal of hydrology 2019 v.569 pp. 1-11
ISSN:
0022-1694
Subject:
vadose zone,   etc   ; analysis of variance; data collection; models; monitoring; prediction; soil hydraulic properties; solutes; water flow;     Show all 9 Subjects
Abstract:
... Accurate estimation of soil hydraulic parameters is essential for modeling of water flow and solute transport in unsaturated soil. Ensemble-based methods have been proposed to provide the optimal monitoring (data-collection) strategy to improve hydraulic parameter estimation. To guarantee the performance, however, these methods usually require relatively large ensemble sizes, leading to high compu ...
DOI:
10.1016/j.jhydrol.2018.11.056

15. Influence of Ambient Temperature, Precipitation, and Groundwater Level on Natural Source Zone Depletion Rates at a Large Semiarid LNAPL Site

Author:
McAlexander, Benjamin; Sihota, Natasha
Source:
Ground water monitoring & remediation 2019 v.39 no.1 pp. 54-65
ISSN:
1069-3629
Subject:
vadose zone,   etc   ; ambient temperature; atmospheric precipitation; biodegradation; carbon dioxide; gases; groundwater; petroleum; sulfates; volatilization; water table;     Show all 11 Subjects
Abstract:
... Natural source zone depletion (NSZD) is increasingly being integrated into management strategies for petroleum release sites. Measurements of NSZD rates can be used to evaluate naturally occurring hydrocarbon (HC) mass losses, and provide a baseline for evaluating engineered recovery systems. Here, nominal saturated and unsaturated zone HC losses were quantified by groundwater sampling and ground ...
DOI:
10.1111/gwmr.12309

16. Modified-DRASTIC, modified-SINTACS and SI methods for groundwater vulnerability assessment in the southern Tehran aquifer

Author:
Noori, Roohollah; Ghahremanzadeh, Hooman; Kløve, Bjørn; Adamowski, Jan Franklin; Baghvand, Akbar
Source:
Journal of environmental science and health 2019 v.54 no.1 pp. 89-100
ISSN:
1532-4117
Subject:
vadose zone,   etc   ; aquifers; groundwater; land use; models; nitrates; risk assessment; wells; Iran;     Show all 9 Subjects
Abstract:
... This study aims to modify the SINTACS and DRASTIC models with a land-use (LU) layer and compares the modified-DRASTIC, modified-SINTACS and SI methods for groundwater vulnerability assessment (GVA) in the southern Tehran aquifer, Iran. Single parameter sensitivity analysis (SPSA) served to determine the most significant parameters for the modified-DRASTIC, modified-SINTACS and SI approaches, and t ...
DOI:
10.1080/10934529.2018.1537728

17. The relevance of measuring saturated hydraulic conductivity: sensitivity analysis and functional evaluation

Author:
De Pue, Jan; Rezaei, Meisam; Van Meirvenne, Marc; Cornelis, Wim
Source:
Journal of hydrology 2019
ISSN:
0022-1694
Subject:
vadose zone,   etc   ; preferential flow; saturated hydraulic conductivity; unsaturated hydraulic conductivity; water flow;     Show all 5 Subjects
Abstract:
... The saturated hydraulic conductivity (Ks) is considered to be one of the main soil hydraulic properties to simulate water transport in the vadose zone, yet it is notoriously difficult to assess due to its large field-scale variability and sensitivity to preferential flow paths. With the increasing availability of convenient methods to measure the unsaturated hydraulic conductivity (Ku), the additi ...
DOI:
10.1016/j.jhydrol.2019.06.079

18. Forecasting concentrations of organic chemicals in the vadose zone caused by spills of hydraulic fracturing wastewater

Author:
Ma, Lanting; Hurtado, Antonio; Eguilior, Sonsoles; Llamas Borrajo, Juan F.
Source:
The Science of the total environment 2019 v.696
ISSN:
0048-9697
Subject:
vadose zone,   etc   ; benzene; environmental factors; human health; hydraulic fracturing; pollutants; ponds; prediction; risk; salts; tanks; toxicity; wastewater;     Show all 13 Subjects
Abstract:
... The return water from hydraulic fracturing operations is characterised by high concentrations of salts and toxic organic compounds. This water is stored on the surface in storage tanks and/or ponds. Wastewater spills caused by inappropriate storage can lead to the contamination of various environmental compartments, thus posing a risk to human health. Such risk can be determined by estimating the ...
DOI:
10.1016/j.scitotenv.2019.133911

19. Comparative assessment of a foam-based oxidative treatment of hydrocarbon-contaminated unsaturated and anisotropic soils

Author:
Bouzid, Iheb; Maire, Julien; Fatin-Rouge, Nicolas
Source:
Chemosphere 2019 v.233 pp. 667-676
ISSN:
0045-6535
Subject:
vadose zone,   etc   ; anisotropy; coal; coal tar; gravity; hydrocarbons; hydrophobicity; liquids; oxidants; oxidation; permeability; polluted soils; surface tension; surfactants; wettability;     Show all 15 Subjects
Abstract:
... In situ delivery of liquid reagents in vadose zone is limited by soil anisotropy and gravity. The enhanced delivery of persulfate (PS) as oxidant, using a new foam-based method (F-PS) was compared at bench-scale to traditional water-based (W-PS) and surfactant solution-based (S-PS) deliveries. The goal was to distribute PS uniformly in coal tar-contaminated unsaturated and anisotropic soils, both ...
DOI:
10.1016/j.chemosphere.2019.05.295

20. Estimation of Unsaturated Hydraulic Conductivity of Granular Soils from Particle Size Parameters

Author:
Wang, Ji-Peng; Zhuang, Pei-Zhi; Luan, Ji-Yuan; Liu, Tai-Heng; Tan, Yi-Ran; Zhang, Jiong
Source:
Water 2019 v.11 no.9
ISSN:
2073-4441
Subject:
vadose zone,   etc   ; engineering; particle size; permeability; porosity; sandy soils; saturated hydraulic conductivity; seepage; unsaturated hydraulic conductivity; wastes; water flow;     Show all 11 Subjects
Abstract:
... Estimation of unsaturated hydraulic conductivity could benefit many engineering or research problems such as water flow in the vadose zone, unsaturated seepage and capillary barriers for underground waste isolation. The unsaturated hydraulic conductivity of a soil is related to its saturated hydraulic conductivity value as well as its water retention behaviour. By following the first author’ ...
DOI:
10.3390/w11091826