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| Titel |
Airborne geophysical survey of the catastrophic landslide at Stože, Log pod Mangrtom, as a test of an innovative approach for landslide mapping in steep alpine terrains |
| VerfasserIn |
I. Baroň, R. Supper, E. Winkler, K. Motschka, A. Ahl, M. Carman, S. Kumelj |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 13, no. 10 ; Nr. 13, no. 10 (2013-10-17), S.2543-2550 |
| Datensatznummer |
250085533
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| Publikation (Nr.) |
 copernicus.org/nhess-13-2543-2013.pdf |
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| Schlagwörter |
Geophysik, Aerogeophysik, Elektromagnetik, Geomagnetik, Naturgefahren, Massenbewegung, Rutschung, Erdrutsch, Kartierung (Massenbewegung) |
| Geograf. Schlagwort |
Slowenien, Julische Alpen |
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| Zusammenfassung |
| Airborne geophysics is a promising method for investigating landslides. Here
we present a case study of multisensor airborne geophysical survey at the
catastrophic landslide Stože near Log pod Mangrtom in Slovenia, which
was conducted in the framework of the European FP7th Project "SafeLand".
Based on the survey itself and achieved results, we discuss applicability,
limits, and benefits and costs of the method for investigating landslides in
steep alpine terrains. Despite of several operational constraints, the
airborne electromagnetic survey of the area well presented the lithological
pattern and water saturation. The high resistivity regions mostly indicated
drained slope scree and landslide mass, drained and loosened material of the
moraine deposit in the tension zone of the landslide with present cracks and
cavities. The minima of the resistivity pattern were attributed to the
outcrop of marls rich in clay, to water-saturated moraine deposit above
impermeable marls in the tension zone, and to water-saturated porous
alluvial gravel and landslide scree along the Koritnica River. The magnetic
survey proved to be inapplicable for such a small and rough area. The
Potassium and Thorium maps, on the other hand, both well identified the
regions of tension inside the landslide zone, outcrops of marls and
dolomite, clay-rich colluvium, weathered zones along a regional tectonic
fault, and alluvial deposits and deposits of debris flows, and the minima of
the 137Cs clearly revealed the zones of material removal due to recent
mass movements. |
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