Application of Ground Penetrating Radar Supported by Mineralogical-Geochemical Methods for Mapping Unroofed Cave Sediments

Čeru, Teja; Dolenec, Matej; Gosar, Andrej

doi:10.3390/rs10040639

Cited by 10 publications

(10 citation statements)

References 52 publications

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“…The result of the time-lapse GPR for WF A′ in Fig. 3d represents that the average moisture contents ratio of sandstone (0–8 m) and clay (0–9 m) in the mining production stage are the smallest, which are 4.89% and 19.58%, respectively, while the ratio in the post-mining stage are basically the same as the unmined stage 15 . This GPR conclusion agrees with the electrical prospecting and seismic exploration results from the water loss that occur in near surface soil loosening caused by the mining effect.…”

Section: Resultsmentioning

confidence: 92%

“…GPR uses electromagnetic radiation to detect the reflected signals from the changes of the material properties, the voids and the cracks in the subsurface. The principle of GPR is similar to the seismology, except GPR methods implement electromagnetic energy rather than acoustic energy 14,15 ,Where V is the electromagnetic wave velocity. C is the velocity of electromagnetic wave propagation in vacuum.…”

Section: Methodsmentioning

confidence: 99%

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Understanding the Capability of an Ecosystem Nature-Restoration in Coal Mined Area

Cui

Lines

Guang

et al. 2019

Sci Rep

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Ecosystem issues have been severely concerned and studied when the coal resource is one of major energy generators, and green mining innovation techniques involving artificial-restorations have addressed and significantly lessened negative impacts on the ecological environment. The ecosystem of a coal-mined area, however, is able to naturally restore with the processes of natural succession, similar to the human body system that has the immune ability to self-heal a wound over time if the wound does not deeply hurt the health. Here we analyze multiple discipline real data from two mining sites, and evidently show an ability of nature that the coal mining related problems such as geological cracks, damaged aquifers and destroyed soils in Quaternary period can naturally recover around a half-year after the end of mining. Our results temporally and spatially demonstrate that the damaged ecosystem has a capability of unaided nature-remediation from the ground to the subsurface, which is very useful to the countries worldwide with abundant coal reserves and intense energy demands for their development.

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Section: Resultsmentioning

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Understanding the Capability of an Ecosystem Nature-Restoration in Coal Mined Area

Cui

Lines

Guang

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The degree of weathering can be quantified by CIA, which is sensitive to the removal of alkalis such as calcium, sodium, and potassium from feldspars (Nesbiitt and Young, 1982). τ reflects chemical gains and losses during weathering based on the elemental concentrations of mobile and immobile elements in weathered and unweathered material (e.g., Brimhall et al, 1985;Chadwick et al, 1990); ε strain in a regolith is based on the density ρ (g cm −3 ) and immobile element concentrations of the weathered regolith in comparison to the unweathered bedrock indicating volumetric gain or loss (Brimhall and Dietrich, 1987).…”

Section: Data Compilationmentioning

confidence: 99%

Comparison of regolith physical and chemical characteristics with geophysical data along a climate and ecological gradient, Chilean Coastal Cordillera (26 to 38° S)

Schaller¹,

Bo²,

Ehlers³

et al. 2020

SOIL

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Abstract. We combine geophysical observations from ground-penetrating radar (GPR) with regolith physical and chemical properties from pedons excavated in four study areas spanning 1300 km of the climate and ecological gradient in the Chilean Coastal Cordillera. Our aims are the following: (1) to relate GPR observations to depth-varying regolith physical and weathering-related chemical properties in adjacent pedons and (2) to evaluate the lateral extent to which these properties can be extrapolated along a hillslope using GPR observations. Physical observations considered include regolith bulk density and grain size distribution, whereas chemical observations are based on major and trace element analysis. Results indicate that visually determined pedolith thickness and the transition from the B to C horizons generally correlate with maximums in the 500 and 1000 MHz GPR envelope profiles. To a lesser degree, these maximums in the GPR envelope profiles agree with maximums in weathering-related indices such as the chemical index of alteration (CIA) and the chemical index of mass transfer (τ) for Na. Finally, we find that upscaling from the pedon to hillslope scale is possible with geophysical methods for certain pedon properties. Taken together, these findings suggest that the GPR profiles down hillslopes can be used to infer lateral thickness variations in pedolith horizons in different ecologic and climate settings, and to some degree the physical and chemical variations with depth.

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“…Despite the accurate results produced from studies on karst cavities conducted using either geophysical [17][18][19][20] or remote sensing [21][22][23][24] methods, the fusion of the two techniques results in advantages in the acquisition, processing, and interpretation of geophysical data. Collecting spatial information on electrodes and surveyed points can particularly enhance sinkhole research.…”

Section: Introductionmentioning

confidence: 99%

Fusion of Remote Sensing and Applied Geophysics for Sinkholes Identification in Tabular Middle Atlas of Morocco (the Causse of El Hajeb): Impact on the Protection of Water Resource

et al. 2020

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The Causse of El Hajeb belongs to the Tabular Middle Atlas (TMA), in which thousands of karst landforms have been identified. Among them, collapse dolines and dissolution sinkholes have been highlighted as a source of environmental risks and geo-hazards. In particular, such sinkholes have been linked to the degradation of water quality in water springs located in the junction of the TMA and Saïss basin. Furthermore, the developments of collapse dolines in agricultural and inhabited areas enhance the risk of life loss, injury, and property damage. Here, the lack of research on newly formed cavities has exacerbated the situation. The limited studies using remote sensing or geophysical methods to determine the degree of karstification and vulnerability of this environment fail to provide the spatial extent and depth location of individual karst cavities. In order to contribute to the effort of sinkhole risk reduction in TMA, we employed remote sensing and geophysical surveys to integrate electrical resistivity tomography (ERT) and self-potential (SP) for subsurface characterization of four sinkholes identified in the Causse of El Hajeb. The results revealed the existence of sinkholes, both visible and non-accessible at the surface, in carbonate rocks. The sinkholes exhibited distinct morphologies, with depths reaching 35 m. Topography, geographic coordinates and land cover information extracted on remote sensing data demonstrated that these cavities were developed in depressions in which agricultural activities are regularly performed. The fusion of these methods benefits from remote sensing in geophysical surveys, particularly in acquisition, georeferencing, processing and interpretation of geophysical data. Furthermore, our proposed method allows identification of the protection perimeter required to minimize the risks posed by sinkholes.

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Application of Ground Penetrating Radar Supported by Mineralogical-Geochemical Methods for Mapping Unroofed Cave Sediments

Cited by 10 publications

References 52 publications

Understanding the Capability of an Ecosystem Nature-Restoration in Coal Mined Area

Understanding the Capability of an Ecosystem Nature-Restoration in Coal Mined Area

Comparison of regolith physical and chemical characteristics with geophysical data along a climate and ecological gradient, Chilean Coastal Cordillera (26 to 38° S)

Fusion of Remote Sensing and Applied Geophysics for Sinkholes Identification in Tabular Middle Atlas of Morocco (the Causse of El Hajeb): Impact on the Protection of Water Resource

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