Title LiDAR for monitoring mass movements in permafrost environments at the cirque Hinteres Langtal, Austria, between 2000 and 2008
Author Avian, M.; Kellerer-Pirklbauer, A.; Bauer, A.
Author Affil Avian, M., Technische Universität Graz, Institut für Fernerkundung und Photogrammetrie, Graz, Austria. Other: Universita1.t Graz, Institüt für Geographie und Raumforschung, Austria; JOANNEUM RESEARCH Graz, Austria
Source Natural Hazards and Earth System Sciences (NHESS), 9(4), p.1087-1094, . Publisher: Copernicus GmbH on behalf of the European Geophysical Society, Katlenburg- Lindau, Germany. ISSN: 1561- 8633
Publication Date 2009
Notes In English. Part of special issue no. 85, LIDAR and DEM techniques for landslides monitoring and characterization, edited by Derron, M.-H., and Jaboyedoff, M., http://www.nat-hazards-earth-syst- sci.net/special_issue85.html; accessed in Sept., 2010; abstract: doi:10.5194/nhess-9- 1087-2009. 19 refs. GeoRef Acc. No: 309771
Index Terms creep; glacial geology; glaciers; ice; landslides; lasers; lidar; mass movements (geology); permafrost; radar; rock glaciers; slopes; statistical analysis; Alps--Hohe Tauern; Alps; Austria; Central Europe; debris; debris flows; digital terrain models; Eastern Alps; Europe; geologic hazards; Hinteres Langtal Glacier; Hohe Tauern; laser methods; lidar methods; mass movements; monitoring; natural hazards; radar methods; regression analysis; Schober Mountains; three- dimensional models; vertical movements
Abstract Permafrost areas receive more and more attention in terms of natural hazards in recent years due to ongoing global warming. Active rockglaciers are mixtures of debris and ice (of different origin) in high-relief environments indicating permafrost conditions for a substantial period of time. Style and velocity of the downward movement of this debris-ice-mass is influenced by topoclimatic conditions. The rockglacier Hinteres Langtalkar is stage of extensive modifications in the last decade as a consequence of an extraordinary high surface movement. Terrestrial laserscanning (or LiDAR) campaigns have been out once or twice per year since 2000 to monitor surface dynamics at the highly active front of the rockglacier. High resolution digital terrain models are the basis for annual and inter- annual analysis of surface elevation changes. Results show that the observed area shows predominantly positive surface elevation changes causing a consequent lifting of the surface over the entire period. Nevertheless a decreasing surface lifting of the observed area in the last three years leads to the assumption that the material transport from the upper part declines in the last years. Furthermore the rockglacier front is characterized by extensive mass wasting and partly disintegration of the rockglacier body. As indicated by the LiDAR results as well as from field evidence, this rockglacier front seems to represent a permafrost influenced landslide.
URL http://www.nat-hazards-earth-syst-sci.net/9/1087/2009/nhess-9-1087-2009.pdf
Publication Type journal article
Record ID 65006341