Article
Geochemistry & Geophysics
D. A. Ciraula, B. J. Carr, K. W. W. Sims
Summary: Geysers are unique hydrothermal features that require specific conditions to produce eruptions, including geometry, fluid and vapor input, and heat. A bubble trap structure plays an important role in the eruption process, as supported by geophysical methods such as electrical resistivity tomography and transient electromagnetics. The study also reveals long-term trends in geyser behavior, with constant eruption durations and decreasing recharge durations over the past 23 years.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Dario Grana, Mingliang Liu, Mohit Ayani
Summary: The text discusses the use of numerical models to predict the distribution of carbon dioxide in deep saline aquifers and depleted reservoirs, and how geophysical data can be used to monitor and predict CO2 saturation. It introduces a new geostatistical inversion approach that combines stochastic optimization methods for predicting the saturation of CO2.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Chemistry, Multidisciplinary
Vincenzo Lapenna, Angela Perrone
Summary: This paper provides an overview and analysis of the application of time-lapse electrical resistivity tomography (TL-ERT) in landslide monitoring. It discusses the advantages and limitations of the TL-ERT method and suggests future research directions for its improvement.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
Zhi-ping Li, Yu Liu, Gui-zhang Zhao, Shao-kang Liu, Wen-hui Liu
Summary: Contamination from light non-aqueous phase liquids (LNAPLs) and their derivatives is a prevalent pollution source that poses direct threats to human health. Conventional investigative methods face limitations in studying the extent and migration process of LNAPL contamination, as well as the redistribution of LNAPL during groundwater level fluctuations. This study utilizes time-lapse electrical resistivity tomography to investigate the migration mechanism of LNAPL under different conditions and establish a relationship between resistivity and water and oil contents. The findings demonstrate the notable capacity of time-lapse electrical resistivity tomography in characterizing the LNAPL migration process.
JOURNAL OF CONTAMINANT HYDROLOGY
(2023)
Article
Environmental Sciences
Ke Shang, Feizhou Zhang, Ao Song, Jianyu Ling, Jiwen Xiao, Zihan Zhang, Rongyi Qian
Summary: This study used 3D GPR to monitor a backfill pit and trained a neural network U-Net with time-lapse data to effectively segment the backfill pit and identify potential changes.
Article
Geochemistry & Geophysics
Aristeidis Nivorlis, Matteo Rossi, Torleif Dahlin
Summary: This study presents a solution for long-term monitoring of DC resistivity and time-domain IP, including a monitoring system and software for automated data collection and processing. The proposed approach is effective in detecting subsurface changes, but has limitations in the absence of a priori information.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
Lige Bai, Zhijun Huo, Zhaofa Zeng, Hui Liu, Jiawei Tan, Tianqi Wang
Summary: Combining time-lapse electrical resistivity (ERT) and self-potential (SP) methods for monitoring groundwater flow provides a direct and reliable approach, with results matching well with in-situ hydrological data.
JOURNAL OF APPLIED GEOPHYSICS
(2021)
Article
Green & Sustainable Science & Technology
Dong Li, Suping Peng, Yinling Guo, Yongxu Lu, Xiaoqin Cui
Summary: The study analyzed the physical characteristics and feasibility of CO2 flooding in the Yanchang Oilfield CCUS project in China. A CO2 storage monitoring method based on FCN was proposed, using time-lapse difference seismic data for geological monitoring. Training the network with a large dataset of forward simulation time-lapse difference data, including noisy and noise-free data, improved the network's noise immunity. The FCN-based CO2 storage monitoring method demonstrated relatively high efficiency and precision in comparison to time-lapse full waveform inversion.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Green & Sustainable Science & Technology
Herui Zhang, Guolin Wang, Xiaozhen Teng, Xiaohui Zheng
Summary: The majority of water inrush accidents in coal mines are caused by mining engineering activities. To address the difficulty of manually processing the huge time series data sets generated by monitoring systems, this research proposed a distributed fuzzy clustering algorithm based on kernel function estimation to automatically analyze TLERT images. Through validation experiments, the results indicate that the algorithm can automatically monitor water migration in the fractured zone and clearly show the edge of the resistivity changing area.
Article
Environmental Sciences
Jordi Mahardika Puntu, Ping-Yu Chang, Haiyina Hasbia Amania, Ding-Jiun Lin, Chia-Yu Sung, M. Syahdan Akbar Suryantara, Liang-Cheng Chang, Yonatan Garkebo Doyoro
Summary: This paper presents an alternative method using the TL-ERI method and time series clustering to monitor groundwater levels and estimate specific yields of an unconfined aquifer under different seasonal conditions. The results obtained from the study showed that this approach was able to estimate hydrogeological parameters and revealed spatial distributions of groundwater levels and specific yields. The findings suggest that the WS03 site is a promising area for further investigation due to its high specific yield capacity and minimal groundwater level fluctuations during the dry and wet seasons.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Environmental Sciences
Laura Delgado -Gonzalez, Nicolas Forquet, Jean -Marc Choubert, Catherine Boutin, Magali Moreau, Sylvain Moreau, Remi Clement
Summary: This paper investigates the impact of secondary treated effluent (STE) infiltration on water pathways in soil and proposes a time-lapse electrical resistivity tomography strategy. The results show that water quality affects the distribution of plant roots and the infiltration capacity.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Multidisciplinary
Alberto Godio, Fulvia Chiampo
Summary: This study investigates the geophysical monitoring of landfill leachate recirculation using electrical resistivity tomography (ERT). The results demonstrate the reliability of ERT in qualitatively detecting the impact of leachate circulation on the landfill volume.
APPLIED SCIENCES-BASEL
(2023)
Article
Geosciences, Multidisciplinary
Peng Su, Jin Yang
Summary: This study proposed a new method of time-lapse ERT inversion, focusing on adaptively imaging time stages and resistivity variations to improve inversion results, using Lp norm regularization and adaptive regularization parameters. This method avoids excessive smoothness caused by low sensitivity, enhancing the accuracy of inversion results.
JOURNAL OF APPLIED GEOPHYSICS
(2022)
Article
Environmental Sciences
Zhuo Xu, Fengjiao Zhang, Christopher Juhlin, Xiangbo Gong, Liguo Han, Calin Cosma, Stefan Lueth
Summary: This study examines the capability of coda wave interferometry (CWI) in monitoring CO2 storage by estimating seismic velocity changes caused by CO2 injection. The highly efficient CWI method is used as a quick detection tool for long-term monitoring of CO2 storage safety, specifically in a cross-well geometry. By utilizing time-lapse upgoing and downgoing waves, CWI can efficiently monitor the area between wells and provide an indication of possible CO2 leakage.
Article
Engineering, Geological
Aurore Carrier, Ombeline Meric, Pierre Bottelin
Summary: Electrical resistivity tomography (ERT) is a common tool used to study landslide morphology and dynamics, but it has limitations in evaluating permeability. Induced polarization (IP) can be used as a complementary tool to assess the physical properties of rocks. This study demonstrates the importance of using time-domain IP (TDIP) in estimating the extent of unstable volumes and the distribution of permeability within a landslide.
Article
Environmental Sciences
Tyler B. Hampton, Jay P. Zarnetske, Martin A. Briggs, Kamini Singha, Judson W. Harvey, Frederick D. Day-Lewis, Farzaneh MahmoodPoor Dehkordy, John W. Lane
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2019)
Article
Geochemistry & Geophysics
Neil Terry, Frederick D. Day-Lewis, John W. Lane, Jared J. Trost, Barbara A. Bekins
Article
Environmental Sciences
Sinchan Roy Chowdhury, Jay P. Zarnetske, Mantha S. Phanikumar, Martin A. Briggs, Frederick Day-Lewis, Kamini Singha
WATER RESOURCES RESEARCH
(2020)
Article
Environmental Sciences
Tyler B. Hampton, Jay P. Zarnetske, Martin A. Briggs, Farzaneh MahmoodPoor Dehkordy, Kamini Singha, Fred D. Day-Lewis, Judson W. Harvey, Sinchan Roy Chowdhury, John W. Lane
Article
Environmental Sciences
Chen Wang, Martin A. Briggs, Frederick D. Day-Lewis, Lee D. Slater
Summary: This study introduces a noninvasive method using complex electrical conductivity to characterize streambed sediment physical properties, demonstrating the sensitivity of imaginary conductivity to sediment surface area and validating the relationships through laboratory and field measurements. Results show that the inverted sediment imaginary conductivity is less impacted by uncertainty in water layer depth and conductivity compared to real conductivity, providing a more accurate assessment of sediment properties.
WATER RESOURCES RESEARCH
(2021)
Article
Water Resources
Chen Wang, Martin A. Briggs, Frederick D. Day-Lewis, Lee D. Slater
Summary: This study explores the use of magnetic susceptibility technology to efficiently map the spatial variations of iron oxide precipitates in rivers impacted by anoxic groundwater discharge. Laboratory and field surveys demonstrate the sensitivity of magnetic susceptibility to sediment iron concentrations and its potential as a complementary tool for mapping Fe oxide accumulation zones. The research highlights the significance of high magnetic susceptibility zones associated with anoxic groundwater discharge in biogeochemical studies and water quality monitoring.
HYDROLOGICAL PROCESSES
(2021)
Article
Environmental Sciences
Allen M. Shapiro, Frederick D. Day-Lewis
Summary: Rapid infiltration following precipitation can lead to groundwater contamination, requiring real-time monitoring of meteorological and groundwater levels to estimate recharge. A physics-based model is proposed to estimate recharge, utilizing real-time data for water-table altitude, precipitation, and evapotranspiration. Model results indicate that the frequency of observations affects the allocation between preferential and diffuse flow.
WATER RESOURCES RESEARCH
(2021)
Editorial Material
Geosciences, Multidisciplinary
Allen M. Shapiro, Frederick D. Day-Lewis
Article
Geosciences, Multidisciplinary
Allen M. Shapiro, Frederick D. Day-Lewis, William M. Kappel, John H. Williams
Summary: A state-space model is developed to estimate daily groundwater recharge using time-series of groundwater-level altitude and meteorological inputs. The model can provide real-time recharge estimates by utilizing real-time hydrologic and meteorological data.
Article
Geosciences, Multidisciplinary
Steven Hammett, Frederick D. Day-Lewis, Brett Trottier, Paul M. Barlow, Martin A. Briggs, Geoffrey Delin, Judson W. Harvey, Carole D. Johnson, John W. Lane, Donald O. Rosenberry, Dale D. Werkema
Summary: Groundwater/surface-water exchange and hyporheic processes are important topics in hydrology. Different methods are used to achieve various goals, but the selection is limited by site conditions. To assist practitioners in selecting appropriate methods for GW/SW and hyporheic studies, we have developed the GW/SW-MST tool, which provides method recommendations based on user input.
Article
Environmental Sciences
W. Anderson McAliley, Frederick D. Day-Lewis, David Rey, Martin A. Briggs, Allen M. Shapiro, Dale Werkema
Summary: In this study, we propose and demonstrate a recursive-estimation framework that uses temperature time series collected at different vertical depths to infer groundwater/surface-water exchange. By calibrating the state-space model using the Extended Kalman Filter and Extended Rauch-Tung-Striebel Smoother, we can effectively estimate time-varying specific discharge. The algorithms are shown to be efficient and rapid for estimating seasonal time-varying flux, and are effective in the presence of rapidly changing flux and nonperiodic thermal boundary conditions, which are problematic for existing approaches.
WATER RESOURCES RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Joshua Thompson, Adam Mangel, Frederick D. Day-Lewis
Article
Geosciences, Multidisciplinary
Leland Dorchester, Frederick D. D. Day-Lewis, Kamini Singha
Summary: Dual-porosity models are commonly used for solute transport in heterogeneous media, but identifying the parameters within these models is challenging. In this study, millifluidics simulations were performed to assess the relationship between fluid flow, solute transport, and electrical resistivity. The results showed that immobile porosity is not only determined by physically mobile or immobile pore space, but also influenced by average linear pore-water velocity and physical obstructions to flow.
Article
Geosciences, Multidisciplinary
Frederick D. Day-Lewis, Rob D. Mackley, Joshua Thompson
Summary: New approaches are needed to assess contaminant mass based on samples from long-screened wells and open boreholes (LSW & OB). The interpretation of concentration samples collected in LSW & OB is complicated in the presence of vertical flow within the well. Recognition of the importance of borehole flow has motivated the use of multi-level wells, packers, and well liners, but LSW & OB remain common for various reasons. Here, a simple analytical model for flow and transport within a well and interaction with the surrounding aquifer is presented, along with an inverse problem approach to estimate formation concentration based on sampled concentrations and flowmeter log data.
Article
Geosciences, Multidisciplinary
Allen M. Shapiro, Frederick D. Day-Lewis
Summary: Assimilating recent observations improves model outcomes for real-time assessments of groundwater processes. Filtering and fixed-lag smoothing produce better estimates of recharge compared to forecasting, reducing uncertainty and better representing time-varying observations. However, these methods are not necessarily mass conservative, unlike forecasting outcomes which are mass conservative.