The Effectiveness of GPR in Sinkhole Investigations

Zisman, E. D.; Wightman, M. J.; Taylor, Christopher

doi:10.1061/40796(177)65

Cited by 6 publications

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“…This method is site specific and clay and/or high conductivity pore fluids limit the depth penetration. The combined effectiveness of GPR and standard penetration test (SPT) methods is investigated in residential sinkholes in West-Central Florida (Zisman et al, 2005). An 80% correlation between the two methods was found in 93 different sites and also, the limitations of the GPR method were discussed.…”

Section: Introductionmentioning

confidence: 99%

The effectiveness of electrical resistivity imaging in sinkhole investigations

Çoşkun¹

2012

Int. J. Phys. Sci.

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Electrical resistivity methods are generally used to explore buried sinkholes and to predict dropout, sinkholes is analysed. A sinkhole of known geology is used to illustrate the limitation of vertical electrical sounding technique. Approximated geological sections of the sinkhole are modelled to investigate the effectiveness of the resistivity imaging which is considered to be two-dimensional exploration approach. The current study demonstrates that the resistivity imaging method is able to constrain the subsurface geological information for engineers, and to decide if soil improvement is needed for these regions of e.g. karstic terrain. If appropriate array distances, comparable to diameter and the depth of sinkhole are selected, the stratigraphy and the structure of the sinkholes can be mapped effectively, and to assess the potential for the future sinkhole development is monitored easily.

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Section: Introductionmentioning

confidence: 99%

The effectiveness of electrical resistivity imaging in sinkhole investigations

Çoşkun¹

2012

Int. J. Phys. Sci.

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“…Evaluation of sinkholes is one of the applications of seismic refraction tomography (Higuera et al, 2007;Hiltunen et al, 2007;and Waltham et al, 2005) and GPR (Zisman et al, 2005 andNuzzo et al, 2004). The GPR system used in Park City study has bistatic antennas of 100 MHz frequency and employs a common offset survey mode.…”

Section: Introductionmentioning

confidence: 99%

Locating of Sinkhole Extension by Seismic Refraction Tomography and GPR Methods

Hanafy

2010

72nd EAGE Conference and Exhibition Incorporating SPE EUROPEC 2010

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In 2008 a stream flow created a sinkhole near Park City, Utah, creating an irregular-shaped depression in the alluvium about 22 m long, 10 m wide and 6 m deep. The entire discharge of a nearby creek flowed into the sinkhole increasing the size of the sinkhole. A total of 10 GPR and 4 seismic refraction profiles were conducted to find lateral and vertical extensions of this sinkhole. Interpretation of GPR profiles reveals the top of the sinkhole and its lateral extension. The exact shape of the sinkhole and its vertical extension is not clear on the GPR profiles because the high attenuation of the EM waves due to the high water saturation at the study area. However, the seismic refraction tomograms show the exact location of the sinkhole in the X and Z directions. Three anomalies with very low velocities are shown on the tomograms corresponding to the karst/cavernous formations, which are surrounded by low velocity zones corresponding to the highly saturated soils/rocks. It is concluded that near-surface karst and other anomolous feature can be revealed by refraction tomography.

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GPR application for the characterization of sinkholes in Teresina, Brazil

et al. 2022

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The town of Teresina, in the state of Piauí, Brazil, presents a history of land sinking processes. Two sinking events deserve to be highlighted, the rst occurred in 1999 at Simplício Mendes street and the other occurred on July 31, 2008, at Francisco Mendes street. In order to identify possible shallow caves and associated structures, the Geological Survey of Brazil/CPRM developed a Ground Penetrating Radar (GPR) study to verify the occurrence of re ection patterns characteristic of these dissolution structures. In the eld, the team conducted GPR sections along streets with a history of collapse. The GPR results obtained with shielded antennas of 200MHz allowed the identi cation of old areas of collapse of the terrain, to a maximum depth of 3 meters. In addition, the results obtained by this study show the potential of applying the GPR method in the characterization of the subsoil of paved streets, making it possible to identify various layers: asphalt, actual pavement, subgrade pavement, soil, saprolite, and mixed material.The high clay content of the subsoil does not allow the GPR to investigate further depths in the research area. The interpretation of aeromagnetometric data shows that the occurrence of sinkholes is associated with magnetic lineaments mainly in the NW-SE direction and enhances the understanding of the structural framework of the study area. HighlightsCharacterization of re ection patterns GPR as a tool for the practical recognition of sinkholes Agility to identify shallow caves and associated structures with GPR

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The Effectiveness of GPR in Sinkhole Investigations

Cited by 6 publications

References 0 publications

The effectiveness of electrical resistivity imaging in sinkhole investigations

The effectiveness of electrical resistivity imaging in sinkhole investigations

Locating of Sinkhole Extension by Seismic Refraction Tomography and GPR Methods

GPR application for the characterization of sinkholes in Teresina, Brazil

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