Geophysical models of the Lesachriegel and Gradenbach deep-seated mass-movements (Schober range, Austria)

Brückl, Ewald; Brückl, Johanna

doi:10.1016/j.enggeo.2005.06.035

Cited by 14 publications

(12 citation statements)

References 5 publications

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“…The conceptual model of the DGSD Sagspitz results in a maximum vertical mass movement thickness of 150-200 m, which is well in agreement with results from other case studies that applied drilling (Noverraz 1996) and geophysical prospecting methods (Ferrucci et al 2000;Brückl and Brückl 2006).…”

Section: Discussionsupporting

confidence: 76%

“…The existence of continuous penetrating basal shear zones in DGSDs is still a matter of ongoing scientific debate (Noverraz 1996). Recent studies mainly focus on their detection by using geophysical methods (Ferrucci et al 2000;Brückl and Brückl 2006); however, these investigations commonly do not extend over the whole length of the DGSD.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogeologic evidence for a continuous basal shear zone within a deep-seated gravitational slope deformation (Eastern Alps, Tyrol, Austria)

Madritsch

Millen²

2007

Landslides

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The currently inactive deep-seated gravitational slope deformation (DGSD) Sagspitz in Tyrol, Austria, covers an area of 3 km 2 and originated along a glacially over-steepened slope composed mainly of phyllites belonging to the Innsbruck Quartzphyllite Complex. Past mass movement processes caused the formation of fracture systems and slump bodies which consequently form the aquifers of relatively large springs in a rock type with generally very low permeability and poor porosity. Analysis of water chemistry, oxygen isotope, and field parameters of the springs emerging from the DGSD imply that multilevel aquifers exist and enabled the detection of continuous deep flow paths through the entire length of the mass movement from the main scarp to the toe of the slope. It is shown that the aquifer boundaries and spring emergences throughout the loosened rock mass can be correlated to the internal and basal shear zones of the DGSD so that this hydrogeological approach proved to be useful for evaluating the mass movement structure.

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Section: Discussionsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Hydrogeologic evidence for a continuous basal shear zone within a deep-seated gravitational slope deformation (Eastern Alps, Tyrol, Austria)

Madritsch

Millen²

2007

Landslides

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“…Debuttressing of slopes is considered an important factor in the destabilization of slopes, particularly in glaciated continents such as Europe and North America (Bovis, 1990;Ambrosi and Crosta, 2006;Brückl and Brückl, 2006). Debuttressing initiates the gravitational deformation of slopes, and some of them, or some parts of the destabilized slopes, fail during severe rainstorms or snow melting .…”

Section: Discussionmentioning

confidence: 99%

September 2005 rain-induced catastrophic rockslides on slopes affected by deep-seated gravitational deformations, Kyushu, southern Japan

Chigira

2009

Engineering Geology

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“…Such a combination of slope development, gravitational deformation, and landslide occurrence was reported in nonglaciated areas such as Kyushu in Japan (Chigira, 2009). The effect of debuttressing on slope destabilization is expected to be similar but less severe than that of glaciated valleys in Europe and North America (Bovis and Evans, 1996;Arsenault and Meigs, 2005;Ambrosi and Crosta, 2006;Brückl and Brückl, 2006), initiating gravitational deformation of slopes, destabilization, and failure during severe rainstorms or snow melting .…”

Section: Prediction Of the Shiaolin Landslide Sitementioning

confidence: 99%

Catastrophic landslide induced by Typhoon Morakot, Shiaolin, Taiwan

2011

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Typhoon Morakot induced the catastrophic and deadly Shiaolin landslide in southern Taiwan on 9 August 2009, resulting in more than 400 casualties. We undertook a geological and geomorphological investigation with the aim of reconstructing the events leading up to this landslide and to clarify factors that contributed to its development. Cumulative rainfall reached up to 1676.5 mm in about three days under the influence of the typhoon, and the Shiaolin landslide, with a volume of 25 x 10(6) m(3), occurred one day after the peak in rainfall intensity. The landslide occurred on a dip slope overlying late Miocene to early Pliocene sedimentary rocks consisting of silty shale, massive mudstone, and sandstone. It started as a rockslide in the upper third of the landslide area and transformed into a rock avalanche that crossed a series of terraces and displaced or buried the village below. It buried the riverbed of the Chishan River and ran up the opposite slope, creating a landslide dam 60 m high, which was breached about I h and 24 min later, flooding the village. The velocity of the landslide is estimated to have been 20.4 to 33.7 m s(-1) and its apparent friction angle was 14 degrees, which indicates its high mobility. The detachments in the source area consist of combinations of bedding planes and joints or faults. The landslide was preceded by gravitational deformation, which appeared as hummocky landforms before the landslide and as buckle folds exposed after the event. The landslide deposits consist of fragments of mudstone, shale, and sandstone, as well as clayey material at its base. This clayey material. consisting of Wire. chlorite, quartz, feldspar, and calcite, is assumed to have strongly influenced the long, rapid runout. (C) 2010 Elsevier B.V. All rights reserved

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Geophysical models of the Lesachriegel and Gradenbach deep-seated mass-movements (Schober range, Austria)

Cited by 14 publications

References 5 publications

Hydrogeologic evidence for a continuous basal shear zone within a deep-seated gravitational slope deformation (Eastern Alps, Tyrol, Austria)

Hydrogeologic evidence for a continuous basal shear zone within a deep-seated gravitational slope deformation (Eastern Alps, Tyrol, Austria)

September 2005 rain-induced catastrophic rockslides on slopes affected by deep-seated gravitational deformations, Kyushu, southern Japan

Catastrophic landslide induced by Typhoon Morakot, Shiaolin, Taiwan

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