Article
Environmental Sciences
Muhammad Hasan, Yanjun Shang
Summary: This study evaluates the regional position of groundwater, geological layers, fractures/faults, water and clay content, groundwater flow, and groundwater yield in the rock formations using electrical resistivity tomography (ERT), magnetic, vertical electrical sounding (VES), self-potential (SP), and induced polarization (IP) methods. The integrated geophysical results are well correlated with borehole data, providing a feasible alternative to the costly traditional methods for reliable evaluation of groundwater reserves in heterogeneous settings.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Engineering, Civil
Zhanbin Luo, Jun Fan, Ming'an Shao, Qian Yang, Miao Gan
Summary: Weathered bedrock particles were found to interfere with infiltration and evaporation processes in loess hilly-gully critical zones. Additionally, characteristics of rock core samples and spatiotemporal water variation in woodland and shrubland slopes were investigated. The study provides insights into the water cycle in shallow soils and water resource utilization under climate change.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Geological
Diyuan Li, Shaohua Du, Chunshun Zhang, Dawei Mao, Bo Ruan
Summary: This study investigated the wetting-induced deformation behavior of rock mass in fault fracture zones, and established a new time-varying effect model for accurate simulation of the wetting deformation. A criterion for judging the deformation stability of such surrounding rock from an engineering perspective was proposed based on the experimental results.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Ebong D. Ebong, Augustine A. Abong, Eric B. Ulem, Loveth A. Ebong
Summary: ERT and VES techniques were used to assess hydrogeological structures and groundwater potential in the Obudu Basement Complex. The study revealed the presence of granite gneiss series with potential groundwater conduits and regional fault systems created by transtensional stress regimes from the neo-Proterozoic syn-orogenic event.
NATURAL RESOURCES RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Dale F. Rucker, Chia-Hsing Tsai, Kenneth C. Carroll, Scott Brooks, Eric M. Pierce, April Ulery, Christopher Derolph
Summary: The study utilized electrical resistivity and induced polarization techniques to investigate the shallow subsurface environment of a bedrock stream, revealing limestone bedrock with high resistivity compared to overlying soil. The soil-bedrock interface was determined through inversion models, showing undulating patterns. High chargeability values were associated with sediments in the floodplain, while low values were related to bedrock, stream, and soil on elevated banks.
JOURNAL OF APPLIED GEOPHYSICS
(2021)
Article
Geochemistry & Geophysics
Gianluca Fiandaca, Per-Ivar Olsson, Pradip Kumar Maurya, Anders Kuhl, Thue Bording, Torleif Dahlin, Esben Auken
Summary: Negative-induced polarization (IP) time-domain transients, currently considered as measurement errors, are actually physically possible and can provide valuable information about the subsurface. Full-waveform IP data processing can help identify these heterodox transients. The subsurface Cole-Cole parameter sensitivities and time-varying IP potential play a significant role in the formation of these transients. Understanding and analyzing them can improve data processing and reduce the resources required for spectral inversion of time-domain data.
Article
Environmental Sciences
Jiadong Dai, Jianhui Zhang, Haichao Xu, Yong Wang, Guoming Zhang, Yaotao Xu, Xinjia Hu
Summary: The study found that tillage-induced bedrock erosion has a significant impact on soil structure and hydraulic properties, increasing water flow channels and promoting the development of fracture-preferential flow.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Geological
Mingyang Song, Qianting Hu, Huihui Liu, Quangui Li, Yuebing Zhang, Zhifang Hu, Jichuan Liu, Yize Deng, Xuewen Zheng, Mingjie Wang
Summary: Understanding the response mechanism of multiparameter rock fractures is essential for accurate crack diagnosis. This study used three-point bending tests, scanning electron microscopy, and real-time resistivity and acoustic emission data to investigate crack propagation and its correlation with rock resistivity or acoustic emission. The results reveal the influence of crack geometry complexity on circuit connectivity and the relationship between resistivity variation and fracture toughness.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Geography, Physical
Pietari Skytta, Nicklas Nordback, Antti Ojala, Niko Putkinen, Ismo Aaltonen, Jon Engstrom, Jussi Mattila, Nikolas Ovaskainen
Summary: This paper investigates the impact of fractures within crystalline bedrock on glacial erosion processes. The results show that the type of fracture is critical for a glacier's ability to erode the bedrock, and specific fracture-controlled erosion signatures can be recognized from bedrock surface morphologies. Individual joints or shear fractures only lead to minor vertical breaks, while the linkage of several parallel shear fractures or the presence of larger faults with gouge-bearing cores and well-developed damage zones cause localized disintegration of the rock material and the subsequent development of distinct topographic depressions.
EARTH SURFACE PROCESSES AND LANDFORMS
(2023)
Article
Environmental Sciences
Siti Lieyana Azffri, Mohammad Faizan Ibrahim, Stefan Herwig Godeke
Summary: Electrical resistivity tomography and induced polarization studies were conducted in agricultural sites in Brunei Darussalam, providing important groundwater exploration results for meeting the water supply demands in the agricultural sector.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Olaf Zielke, Lucilla Benedetti, Paul Martin Mai, Jules Fleury, Magali Rizza, Sophie Viseur
Summary: This study investigates the roughness of two fault surfaces in Italy to determine the number and size of past earthquakes. The results suggest that fault plane roughness analysis may be a more sensitive indicator of past earthquake activity than cosmogenic dating.
Article
Geochemistry & Geophysics
Joost Hase, Grigory Gurin, Konstantin Titov, Andreas Kemna
Summary: This article presents an approach based on Debye decomposition for converting time-domain induced polarization (IP) data into frequency-domain complex resistivity models. The conversion scheme is implemented using a non-linear Gauss-Newton inversion scheme and is validated through synthetic and field data studies.
Article
Geochemistry & Geophysics
Alex Miltenberger, Sebastian Uhlemann, Tapan Mukerji, Ken Williams, Baptiste Dafflon, Lijing Wang, Haruko Wainwright
Summary: As climate changes and populations grow, groundwater sustainability becomes more crucial. Hydrogeologic models are important tools for decision-making, but a common issue arises when multiple geological phenomena could explain a single subsurface parameterization.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Multidisciplinary Sciences
Sebastian Uhlemann, Baptiste Dafflon, Haruko Murakami Wainwright, Kenneth Hurst Williams, Burke Minsley, Katrina Zamudio, Bradley Carr, Nicola Falco, Craig Ulrich, Susan Hubbard
Summary: This study quantifies the relationships between bedrock geophysical/hydrological properties and geomorphological/vegetation indices using machine learning, based on the covariability analysis of above- and belowground features on a watershed scale. The results show that machine learning can estimate most of their covariability, but regions of lower variability in the input parameters provide better estimates, indicating a limitation of commonly applied geomorphological models.
Article
Chemistry, Physical
Xiang Xi, D. D. L. Chung
Summary: The study investigated the direct-current-induced electric polarization/depolarization of conductive material (graphite). It was found that forward-current polarization and reverse-current depolarization affect the resistivity, with carrier-atom interaction engaging more readily than disengagement. The efficiency of carrier-atom interaction decreases with increasing injected electrons, and the rate of the increase in carriers participating decreases with increasing injected electrons.
Article
Engineering, Environmental
Muhammad Hasan, Yanjun Shang, Weijun Jin, Gulraiz Akhter
Summary: This study describes the efficiency of an integrated geophysical approach for investigating the subsurface of a highly heterogeneous site in Huidong County, China. The proposed approach combines electrical resistivity tomography (ERT), magnetic, induced polarization (IP), and self-potential (SP) methods to evaluate subsurface formation and groundwater resources. The results show the potential for reducing the number of boreholes required for site characterization and identifying problematic geologic structures. The study demonstrates the usefulness of this integrated approach for engineering infrastructure development and groundwater exploitation in heterogeneous sites.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Engineering, Geological
Muhammad Hasan, Yanjun Shang, Peng Shao, Xuetao Yi, He Meng
Summary: Accurate evaluation of rock mass quality and faults/fractures is a major challenge in rock mechanics and rock engineering. This study introduces an empirical geophysical approach using electrical resistivity tomography (ERT) to assess rock mechanical parameters for foundation design. The approach reduces the need for drilling and provides more accurate evaluation of rock mass quality. The approach can be used in areas where it is difficult to obtain core samples.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Nabeel Afzal Butt, Muhammad Younis Khan, Seema Anjum Khattak, Gulraiz Akhter, Yonggang Ge, Muhammad Tahir Shah, Asam Farid
Summary: Open and non-engineered dumping is a common method of solid waste disposal in Pakistani cities, which poses a serious threat to the surrounding ecosystem and human population. This study used geophysical and geochemical techniques to assess a non-engineered and open dumpsite in Pakistan, revealing that the site is a potential source of contamination to agricultural land, surface water, and groundwater.
Article
Astronomy & Astrophysics
Muhammad Hasan, Yanjun Shang, Peng Shao, Xuetao Yi, He Meng
Summary: Evaluation of rock mass quality is essential for proper design of engineering infrastructures. The use of electrical resistivity tomography (ERT) can provide 2D/3D information and bridge gaps between well data and the geological model, allowing for thorough evaluation of rock mass quality even where no boreholes exist.
EARTH AND SPACE SCIENCE
(2022)
Article
Engineering, Geological
Muhammad Hasan, Yanjun Shang
Summary: Uncertainty in geological models, caused by natural heterogeneity and inadequate data, can lead to substantial societal risks. Optimizing underground resource utilization is crucial for reducing uncertainty.
ENGINEERING GEOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Gulraiz Akhter, Yonggang Ge, Muhammad Hasan, Yanjun Shang
Summary: Determining the hydrological properties of the aquifer is crucial in hydrogeological and geotechnical studies. This study combines laboratory data, pumping test, and vertical electric sounding to determine the hydraulic properties of the Lower Bari Doab in Pakistan. The results improve the understanding of the aquifer and will aid in the development and management of groundwater resources in the area.
APPLIED SCIENCES-BASEL
(2022)
Article
Green & Sustainable Science & Technology
Abdul Jabbar Khan, Gulraiz Akhter, Yonggang Ge, Muhammad Shahid, Khalil Ur Rahman
Summary: Limestone is the most common and cost-effective technique for treating Acid Mine Drainage (AMD), reducing acidity, increasing alkalinity, and precipitating heavy metals. Wargal limestone has been shown to have high potential for neutralization and treatment of PTEs in mine water or AMD.
Article
Engineering, Geological
Muhammad Hasan, Yanjun Shang, Xuetao Yi, Peng Shao, Meng He
Summary: The determination of rock mechanical parameters is crucial for evaluating rock mass quality in geotechnical engineering. Traditional borehole methods are time-consuming and expensive, making them unsuitable for steep terrains. In contrast, geophysical methods offer a non-invasive, rapid, and economical alternative. This study proposes a geophysical approach that integrates KV measurements from limited boreholes with inverted resistivity obtained from electrical resistivity tomography (ERT). The combination of ERT and induced polarization (IP) helps to assess different rock masses, including weathered and fresh rock. The results demonstrate that the proposed method reduces ambiguities caused by inadequate data and provides more accurate insights into rock mass quality.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Muhammad Hasan, Yanjun Shang
Summary: This study proposes a joint geophysical approach using electrical resistivity, magnetic, induced polarization, and self-potential parameters to assess a highly heterogeneous terrain in South China for the installation of the Accelerator Driven System (ADS) facility.
JOURNAL OF APPLIED GEOPHYSICS
(2022)
Article
Engineering, Geological
Muhammad Hasan, Yanjun Shang, He Meng, Xuetao Yi, Peng Shao
Summary: This study introduces a novel geophysical approach to estimate rock mass integrity through integration of ERT electrical resistivity and borehole-based Kv, providing more accurate rock mass quality classification results. This method eliminates the need for extensive drilling tests and offers a comprehensive assessment of rock mass integrity for engineered infrastructures design.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Article
Engineering, Environmental
Muhammad Hasan, Yanjun Shang, Xuetao Yi, Peng Shao, He Meng
Summary: Rock mass integrity is assessed through geotechnical parameters like Rock Quality Designation (RQD). Traditional methods of obtaining RQD from borehole rock cores are time-consuming, expensive, and have topographic constraints. Geophysical methods offer a faster, cheaper, and non-intrusive alternative, providing volumetric measurements and reducing uncertainties in subsurface geotechnical models. This study used an empirical integration of Electrical Resistivity Tomography (ERT) and well data to estimate RQD and assess the subsurface geotechnical model.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Environmental Sciences
Muhammad Hasan, Yanjun Shang
Summary: This study evaluates the regional position of groundwater, geological layers, fractures/faults, water and clay content, groundwater flow, and groundwater yield in the rock formations using electrical resistivity tomography (ERT), magnetic, vertical electrical sounding (VES), self-potential (SP), and induced polarization (IP) methods. The integrated geophysical results are well correlated with borehole data, providing a feasible alternative to the costly traditional methods for reliable evaluation of groundwater reserves in heterogeneous settings.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Multidisciplinary Sciences
Muhammad Hasan, Yanjun Shang, Qingsen Meng
Summary: Thorough and accurate assessment of rock mass units is crucial for the development of engineering infrastructures and groundwater resource assessments. Traditional geotechnical tests suffer from efficiency issues, causing ambiguity in geological models. This research proposes a method using geophysical data and drilling to obtain geomechanical parameters, reducing geological model uncertainty and providing detailed imaging of RQD and RCI. The study fills the gap between inadequate well tests and true geological models, providing new insights for engineering design and groundwater exploitation.
SCIENTIFIC REPORTS
(2023)
