Results 41 to 50 of about 228 (134)

A Comparison of Surface-to-Coal Mine Roadway TEM and Surface TEM Responses to Water-Enriched Bodies

IEEE Access, 2019
The surface transient electromagnetic method (TEM) is a geophysical technology normally used in detecting water-enriched zones. However, with an increase of mining depth, the accuracy and reliability of surface detection is gradually reduced, and surface
Jianghao Chang, Guoqiang Xue, Reza Malekian   +2 more
doaj   +1 more source

A Decade of Airborne Electromagnetic Surveying Lake Menindee (Australia) Under Varying Water Levels

Geophysical Prospecting, Volume 74, Issue 4, May 2026.
ABSTRACT Time domain airborne electromagnetic (AEM) surveying is a mature geophysical tool for imaging the Earth's shallow subsurface. It produces images of the electromagnetic conductivity structure of the earth, down to depths of a few hundred metres.
A. Ray, A. McPherson, R. C. Brodie, A. Y. Ley‐Cooper, K. P. Tan, M. Hatch, R. N. Deo, S. Wong, F. Dauti, W. Cook, T. Scarr, Y. Sun   +11 more
wiley   +1 more source

Magma and Volatile Pathways Beneath Sakurajima Volcano From Self‐Potential, Helium Isotopes, and Broadband Magnetotellurics

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract At frequently erupting volcanoes, magma and volatiles ascend through established pathways, but the complete picture of their branching and supply system remains unclear. We integrated self‐potential (SP), broadband magnetotelluric (MT), and helium isotope observations to image magma and volatile pathways beneath Sakurajima Volcano.
K. Aizawa, T. Koyama, H. Hase, M. Uyeshima, H. Sumino   +4 more
wiley   +1 more source

Transient Electromagnetic Monitoring of Permafrost: Mathematical Modeling Based on Sumudu Integral Transform and Artificial Neural Networks

Mathematics
Due to the ongoing global warming on the Earth, permafrost degradation has been extensively taking place, which poses a substantial threat to civil and industrial facilities and infrastructure elements, as well as to the utilization of natural resources ...
Viacheslav Glinskikh, Oleg Nechaev, Igor Mikhaylov, Marina Nikitenko, Kirill Danilovskiy   +4 more
doaj   +1 more source

A Hydrogeophysical Survey Utilising the sTEM and sTEMprofiler Systems: Transient Electromagnetic Data and Resistivity Models

Geoscience Data Journal, Volume 13, Issue 2, April 2026.
We present a transient electromagnetic dataset from northwestern Denmark acquired with the novel sTEMprofiler system, mapping buried Quaternary valleys. The open dataset, including raw data and resistivity models, enables benchmarking of inversion methods and integration into geological and hydrological studies. ABSTRACT Transient electromagnetic (TEM)
Line M. Madsen, Angelos Almpanis, Frederikke Storm, Jesper B. Pedersen   +3 more
wiley   +1 more source

Subsurface Investigations of Cryo‐Hydrogeological Features in a High Arctic Catchment Under Transition

Permafrost and Periglacial Processes, Volume 37, Issue 2, Page 267-283, April/June 2026.
ABSTRACT In this study, the internal structure and seasonal variations of cryo‐hydrogeological features were investigated in the Fuglebekken catchment, located near the Polish Polar Station Hornsund in Svalbard. Over a few years, rising air temperatures and intensified water circulation have significantly altered the distribution, extent, and state of ...
Tomasz Wawrzyniak, Szymon Oryński, Artur Marciniak, Marzena Osuch   +3 more
wiley   +1 more source

Grouting Treatment of Water and Mud Inrush in Fully Weathered Granite Tunnel: A Case Study

Geofluids, 2020
When mountain tunnel passes through completely weathered granite strata, water and mud inrush is easy to occur, causing casualties and economic losses. Grouting is a common and effective treatment method for water and mud inrush disaster.
Jiandong Niu, Yong Sun, Bin Wang, Keneng Zhang, Youhan Huang, Shiwu Huang, Jiaqin Yu, Liangliang Qiu   +7 more
doaj   +1 more source

Time‐Varying Gravity Constraints on Groundwater Recharge and Managed Aquifer Strategies in Southern Taiwan

Water Resources Research, Volume 62, Issue 4, April 2026.
Abstract Understanding groundwater recharge pathways is essential for designing effective managed aquifer strategies, yet in heterogeneous alluvial aquifers, these pathways are often uncertain and difficult to resolve with sparse well networks. We apply gravity as an independent constraint to quantify groundwater storage dynamics and evaluate recharge ...
Kuan‐Hung Chen, Cheinway Hwang, Ching‐Chung Cheng, Chia‐Kuei Kang, Miao‐Hsiang Peng, Jet‐Chau Wen, I‐Chen Kuo   +6 more
wiley   +1 more source

Key technologies for artificial intelligence-based inversion of the borehole transient electromagnetic method in coal mining areas

Meitian dizhi yu kantan
BackgroundUsing directional boreholes, the borehole transient electromagnetic (TEM) method enables near-field excitation and the simultaneous reception of three components within a borehole.
Tao FAN, Yue HAO, Peng ZHANG, Ping LI, Zhao ZHAO, Rui ZHAO, Qiang LIU, Junsheng YAN, Xianzhe SONG, Borui LIU, Changyuan CHEN, Bo LI   +11 more
doaj   +1 more source

The Evolving Roles of Electrical Geophysical Methods for In Situ Remediation Assessment: Progress and Perspectives

Water Resources Research, Volume 62, Issue 4, April 2026.
Abstract In situ remediation of contaminated soil and groundwater demands real‐time monitoring to capture complex subsurface dynamics. Geophysical methods, particularly electrical resistivity tomography (ERT) and induced polarization (IP), offer non‐ or minimally invasive, high‐resolution imaging of subsurface changes during remediation.
Teng Xia, Miao Li, Lee Slater, Xiangyun Hu, Andrew Binley, Xinmin Ma, Deqiang Mao   +6 more
wiley   +1 more source