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Assessing sinkhole activity in the Ebro Valley mantled evaporite karst using advanced DInSAR

AutorGalve, Jorge Pedro; Castañeda del Álamo, Carmen ; Gutiérrez, Francisco; Herrera, Gerardo
Palabras clavekarst subsidence
Fecha de publicaciónene-2015
CitaciónGalve JP, Castañeda C, Gutiérrez F, Herrera G. Assessing sinkhole activity in the Ebro Valley mantled evaporite karst using advanced DInSAR. Geomorphology 229: 30-44 (2015)
ResumenSinkholes in karst areas may cause subsidence damage in transportation infrastructures, demolition of buildings and even the loss of human lives when they occur in a catastrophic way. Differential Interferometry (DInSAR) is a promising technology for detecting and characterizing sinkholes, as well as for reducing the associated risk when combined with other sources of data such as a sinkhole inventory. In this work, the usefulness of InSAR techniques and data for sinkhole risk management have been analyzed through the comparison of three DInSAR-derived velocity maps with a comprehensive sinkhole inventory in the Ebro Valley, NE Spain. The DInSAR maps have contributed to improve the sinkhole inventory in different ways: (1) detection of non-inventoried sinkholes; (2) revision of sinkhole areas previously classified as inactive as active; (3) refinement of underestimated sinkhole boundaries. The obtained results suggest that DInSAR products are suitable for analyzing active dissolution-induced subsidence. The application of these techniques may help in recognizing and better characterizing previously unknown karst subsidence problems and in preventing personal and property losses. However, the analysis reveals that the available DInSAR maps combined overlook about 70% of the previously mapped active sinkholes mainly due to decorrelation.
Descripción52 Pags.- 1 Tabl.- 1 Fig.- 2 Suppl. Tabls.- 1 Supp. Fig. Available online 11 August 2014. The definitive version is available at: http://www.sciencedirect.com/science/journal/0169555X
Versión del editorhttp://dx.doi.org/10.1016/j.geomorph.2014.07.035
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