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dc.contributor.author Theron, Andre
dc.contributor.author Engelbrecht, Jeanine
dc.contributor.author Kemp, J
dc.date.accessioned 2017-06-07T07:09:15Z
dc.date.available 2017-06-07T07:09:15Z
dc.date.issued 2016-08
dc.identifier.citation Theron, A., Engelbrecht, J. and Kemp, J. 2016. Potential of sinkhole precursor detection through interferometric SAR. 35th International Geological Congress, Cape Town, 27 August- 4 September 2016 en_US
dc.identifier.uri https://www.americangeosciences.org/sites/default/files/igc/1644.pdf
dc.identifier.uri http://hdl.handle.net/10204/9167
dc.description 35th International Geological Congress, Cape Town, 27 August- 4 September 2016 en_US
dc.description.abstract Sinkholes are an unpredictable geohazard that endangers life and structures in susceptible areas globally. Subsidence sinkholes occur above cavernous bedrock comprised of highly soluble evaporates or calcium carbonates such as dolomite or limestone. Their formation requires the erosion of regolith material into cavities leading to the collapse of the roof strata. The cavity formation and subsequent erosion is mainly due to groundwater extraction or the ingress of water, often from leaking services or poor storm water drainage [1]. Although sinkholes generally appear catastrophically with little warning, the appearance of tension cracks, cracks in infrastructure and surface subsidence are often early signs of sinkhole development. Such precursory deformation occurs weeks to years before sinkhole formation due to underground cavity migration. These precursors are key to an operational early warning system and detecting them is currently a major challenge for sinkhole hazard mitigation efforts [2]. However, the location and timing of sinkholes is typically unpredictable. The in situ monitoring of large areas for small scale subsidence is therefore not feasible. en_US
dc.language.iso en en_US
dc.publisher American Geosciences Institute en_US
dc.relation.ispartofseries Worklist;18023
dc.subject Sinkholes en_US
dc.subject Geohazards en_US
dc.subject Satellite remote sensing en_US
dc.subject Synthetic aperture radar en_US
dc.subject SAR en_US
dc.title Potential of sinkhole precursor detection through interferometric SAR en_US
dc.type Presentation en_US


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