Theron, AndreEngelbrecht, JeanineKemp, J2017-06-072017-06-072016-08Theron, 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 2016https://www.americangeosciences.org/sites/default/files/igc/1644.pdfhttp://hdl.handle.net/10204/916735th International Geological Congress, Cape Town, 27 August- 4 September 2016Sinkholes 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.enSinkholesGeohazardsSatellite remote sensingSynthetic aperture radarSARConference PresentationTheron, A., Engelbrecht, J., & Kemp, J. (2016). Potential of sinkhole precursor detection through interferometric SAR. American Geosciences Institute. http://hdl.handle.net/10204/9167Theron, Andre, Jeanine Engelbrecht, and J Kemp. "Potential of sinkhole precursor detection through interferometric SAR." (2016): http://hdl.handle.net/10204/9167Theron A, Engelbrecht J, Kemp J, Potential of sinkhole precursor detection through interferometric SAR; American Geosciences Institute; 2016. http://hdl.handle.net/10204/9167 .TY - Conference Presentation AU - Theron, Andre AU - Engelbrecht, Jeanine AU - Kemp, J AB - 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. DA - 2016-08 DB - ResearchSpace DP - CSIR KW - Sinkholes KW - Geohazards KW - Satellite remote sensing KW - Synthetic aperture radar KW - SAR LK - https://researchspace.csir.co.za PY - 2016 T1 - Potential of sinkhole precursor detection through interferometric SAR TI - Potential of sinkhole precursor detection through interferometric SAR UR - http://hdl.handle.net/10204/9167 ER -