Results 51 to 60 of about 291 (154)

Automatic stochastic 3D clay fraction model from tTEM survey and borehole data

Scientific Reports, 2022
In most urbanized and agricultural areas of central Europe, the shallow underground is constituted of Quaternary deposits which are often the most extensively used layers (water pumping, shallow geothermic, material excavation).
Alexis Neven, Anders Vest Christiansen, Philippe Renard   +2 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

Investigating surface-borehole transient electromagnetic responses from veined orebodies considering induced polarization effects

Meitian dizhi yu kantan
ObjectiveThe observational data derived using the surface-borehole transient electromagnetic (TEM) method tend to feature complex curve morphologies, a problem posing significant challenges to data processing and interpretation.
Jianhui LI, Yao WANG, Wenchuang WANG, Shaojian XIE, Siwei ZHU   +4 more
doaj   +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

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

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

Stratigraphic evidence for modern‐like glacier extents in south‐central Alaska within the last glacial period (MIS 3)

Boreas, Volume 55, Issue 2, Page 476-502, April 2026.
The last (Wisconsinan) glacial period was punctuated in North America by two glacial maxima, known as the Early and Late Wisconsinan glaciations. In Alaska, these maxima and their subsequent retreats have been the object of dating efforts to reconstruct local climatic events and compare them to global trends.
Bruno Belotti, Elizabeth J. Cassel, Timothy C. Bartholomaus, Michael G. Loso, Michael S. Christoffersen, John W. Holt   +5 more
wiley   +1 more source

Advances in research on borehole geophysical exploration and associated equipment for advance detection of underground water hazards in coal mines

Meitian dizhi yu kantan
BackgroundDeep coal mining is facing increasingly complex hidden disaster-causing factors, including faults, collapse columns, water accumulation in goaves, confined water in coal seam floors, and hydraulically conductive fracture zones. In this context,
Qiang WU, Xianhui WANG, Donghui YANG, Wenhao XIAO, Zhuangjie CUI, Han CHEN, Zhen SHENG, Yifan ZENG   +7 more
doaj   +1 more source

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

Groundwater Temperature Processes and Patterns: Implications for Stream Thermal Regimes

WIREs Water, Volume 13, Issue 2, March/April 2026.
Shallow groundwater temperatures are controlled by ground surface temperatures and are influenced by climate change and land cover changes. Deeper groundwater temperature is constant year‐round, making it cooler (warmer) in the summer (winter) than surface water, and exhibits a lagged response to surface warming.
Barret L. Kurylyk, Christa Kelleher, Dylan J. Irvine, Hayden A. Tackley, Jason A. Leach, Bethany T. Neilson, Victor F. Bense   +6 more
wiley   +1 more source