Detecting Sinkholes Using Ground Penetrating Radar in Drâa Douamis, Cherea Algeria: A Case Study
Ismail Nouioua1*, Med Laid Boukelloul2, Chamseddine Fehdi1, Fathi Baali1
1. Laboratoire Eau et Environnement, University of Tebessa, Tébessa 12002 Algeria
Sinkhole collapse is one of the main limitations on the development of karst areas, especially where bedrock is covered by unconsolidated material. Studies of sinkhole formation have shown that sinkholes are likely to develop in cutter (enlarged joint) zones as a result of subterranean erosion by flowing groundwater. GPR (Ground Penetrating Radar) is well suited to mapping sinkholes because the ability of this technique for detecting voids and discriminating subtle resistivity variations. Nine Ground penetrating radar (GPR) profiles have been applied, with relative success, to locate paleo-collapses and cavities, and to detect and characterise karst at two sinkhole sites in Drâa Douamis where limestone is covered by about 10 m of clayey soils.
The survey results suggest that GPR is an ideal geophysical tool to aid in the detection and monitoring of sinkholes and other subsurface cavities.
Keywords: GPR; Sinkhole; Karst; Drâa Douamis; Algeria
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