Abstract
Sinkholes along Dead Sea (DS) coastal areas are linked to evaporate karst cavities that are formed by slow salt dissolution. Both the dynamics of sinkholes development and their location suggest that the salt becomes less consolidated as the result of circulation of unsaturated water, thus intensifying the karstification process. Both the dynamics of sinkholes development and their location suggest that sinkhole appear in the areas where salt is less consolidated, thus intensifying the karstification process. The knowledge of shear-wave velocities (Vs) should shed light on mechanical and physical properties of salt. We have suggested Vs estimation using Multichannel Analysis of Surface Waves (MASW). Along the Israeli shoreline, Vs mapping has been performed to discriminate salt layers into the soft and hard zones using calibration of inverted Vs near boreholes. It has been shown that there is Vs increase in the DS direction from 760 m/s (near salt edge) more than 1,600 m/s. Then we quantitatively estimated in situ hydraulic conductivity K of the salt layers based on correlation between Vs and K provided by the Magnetic Resonance Sounding (MRS) method.
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References
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This publication was made possible through support provided by the U.S. Agency for International Development, under the terms of Award M27-050.
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Ezersky, M., Legchenko, A. (2015). Mapping of Salt Consolidation and Permeability Using MASW Method in the Dead Sea Sinkhole Problem. In: Lollino, G., Manconi, A., Guzzetti, F., Culshaw, M., Bobrowsky, P., Luino, F. (eds) Engineering Geology for Society and Territory - Volume 5. Springer, Cham. https://doi.org/10.1007/978-3-319-09048-1_89
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DOI: https://doi.org/10.1007/978-3-319-09048-1_89
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