Results 31 to 40 of about 284 (138)

“Cold Tropics”: Permafrost Existence and Thickness on Eastern Nevado Coropuna (Southern Peruvian Andes) Revealed by Ground‐Penetrating Radar and Geoelectrical Soundings

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT The existence of permafrost was explored at tropical latitude on Nevado Coropuna (southern Peruvian Andes) using a combination of ground‐penetrating radar (GPR) and vertical electrical sounding (VES) in order to strengthen the mutual validation of data processing and interpretation.
Velnia Chacca, Ramón Pellitero, Adriano Ribolini, José Úbeda, Luis Mariano del Río, Ricardo Vila, Oscar Vilca   +6 more
wiley   +1 more source

Imaging Point Source Groundwater Discharges in a Confined Coastal Aquifer Using Electrical Resistivity

Groundwater, EarlyView.
Marine electrical resistivity tomography (ERT) is applied to characterize point‐source submarine groundwater discharge (PSGD) along NW Yucatán. ERT observations and forward modeling constrain conduit detectability under varying hydrogeological conditions.
Mariana Gómez‐Nicolás, Armando Huitzilt‐Rodriguez, Enrique Iñiguez, Roger Pacheco‐Castro, Marco Pérez‐Flores, Paulo Salles, Fiona Whitaker   +6 more
wiley   +1 more source

Numerical simulation of water-bearing coal goaf using ground-borehole TEM—a case study of Tongxin Coal Mine, Shanxi Provice, China

Frontiers in Earth Science
Transient electromagnetic method (TEM) is widely used in coalfield hydrogeological exploration and goaf investigation. However, given the limitations of the method, the vertical resolution of ground TEM is somewhat low for effectively detecting water ...
Yang Yang, Yang Yang, Sanxi Peng, Huimei Shan, Qinghua Peng   +4 more
doaj   +1 more source

A geophysical investigation of the Roter Kamm impact crater, Namibia

Meteoritics &Planetary Science, EarlyView.
Abstract The Roter Kamm impact crater is located in the southern Namib Desert. The crater has a diameter of 2.5 km and belongs to the category of simple, bowl‐shaped impact craters, with an elevated rim of fractured target rock. The crater's interior is completely buried beneath sediments, preventing extensive surface investigations of the bedrock ...
Hannah Nienhaus, Pritam Yogeshwar, Wiebke Mörbe, Bülent Tezkan, Yajun Liu, Bufelo Lushetile, Martin Melles   +6 more
wiley   +1 more source

Technical advances and research directions of borehole geophysical prospecting for coal mines

Meitian dizhi yu kantan
BackgroundHigh-precision and long-distance exploration of geological conditions is required for coal extraction and disaster prevention in coal mines. However, traditional drilling and geophysical prospecting methods face technical bottlenecks such as ...
Jianyuan CHENG, Yu YAN, Yuteng LI, Pan WANG, Rui ZHAO, Bici JIANG   +5 more
doaj   +1 more source

Statistical modeling of three-dimensional redox architecture from non-colocated redox borehole and transient electromagnetic data

Hydrogeology Journal, 2023
AbstractAgricultural nitrate pollutants infiltrate into the subsurface and contaminate groundwater. The redox environment in the subsurface is important for the natural removal of nitrate by denitrification. Detailed knowledge of the redox conditions is needed in order to make better-targeted nitrogen regulations for farmers.
Lijing Wang, Hyojin Kim, Birgitte Hansen, Anders V. Christiansen, Troels N. Vilhelmsen, Jef Caers   +5 more
openaire   +2 more sources

Evaluating the sustainability of mineral water consumption using multi‐scale hydrogeophysics in Caxambu, Brazil

Near Surface Geophysics, Volume 24, Issue 3, Page 234-251, June 2026.
Abstract A better understanding of the near‐surface aquifer system of the Caxambu Water Park, located in the Minas Gerais State, Brazil, has been achieved. The study aimed to identify groundwater reservoirs and flow patterns and contribute to the hydrogeological conceptual model using a multi‐scale geophysical approach.
Emanuele F. La Terra, Miguel Tupinambá, Liliane P. Panetto, José Antonio N. Pereira, Tainã P. Oliveira, Antonio Carlos Pedrosa‐Soares   +5 more
wiley   +1 more source

Assessment of complex subsurface redox structures for sustainable development of agriculture and the environment

Environmental Research Letters, 2021
Cost-efficient targeted nitrogen (N) regulation of agriculture with low impact on the environment is the new N regulation paradigm. It requires detailed knowledge on the geological and geochemical conditions of the subsurface that is crucial for ...
Birgitte Hansen, Denitza D Voutchkova, Peter B E Sandersen, Anders Kallesøe, Lærke Thorling, Ingelise Møller, Rasmus B Madsen, Rasmus Jakobsen, Jens Aamand, Pradip Maurya, Hyojin Kim   +10 more
doaj   +1 more source

Feasibility of Crosshole Seismic Tomography for Monitoring In Situ CO2 Mineral Storage in Basalts: A Rock Physics‐ and Seismic Modeling Study

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract In situ CO2 mineral storage is gaining increasing attention as a carbon capture and storage (CCS) technology to reduce anthropogenic CO2 emissions. So far, in situ CO2 mineral storage projects have been monitored predominantly using fluid‐ and isotope geochemical methods.
Jonas Simon Junker, Hansruedi Maurer, Alba Zappone, Sin‐Mei Wu, Anne Obermann   +4 more
wiley   +1 more source

Key technologies of borehole comprehensive geophysical prospecting for advanced detection in directional long drilling of rapid excavation working face

Meitan kexue jishu
The efficient and intelligent production in coal mining necessitates more precise detection of hidden underground disaster-causing factors. Rapid excavation faces challenges in the accuracy and efficiency of detecting coal-rock interfaces, geological ...
Ping LI, Rong WEI, Tao FAN, Rui ZHAO, Bici JIANG, Xiaochao TIAN   +5 more
doaj   +1 more source