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In context of global climate change and the continuous extension of settlement areas in the Alps especially due to tourism, an increasing conflict between land use and natural hazard prevention can be observed. This also includes deep seated landslides, which if activated can cause considerable damage to settlements and infrastructure and even can endanger lives. To date the hazard potential of slow deep seated landslides often is underestimated. Due to economic reasons such potentially dangerous instable slopes if at all often are only monitored sporadically. The alpEWAS project (“development and testing of an integrative 3D early warning system for alpine instable slopes”) is currently developing a low cost 3D monitoring and early warning system for landslides based on three innovative economic continuous measurement systems for underground and surface deformations: Time Domain Reflectometry (TDR), Reflectorless Video Tacheometry (VTPS) and Low Cost Global Navigation Satellite System (GNSS). These are merged with other sensors, which monitor typical trigger mechanisms (e.g. precipitation), into a geo sensor network, which provides remote online access to all data in near real time. The alpEWAS system has been installed at the Aggenalm landslide, located in the Bavarian Alps near Bayrischzell, for a first field test. To date the system has reliably produced data for about 8 months, of which the first time series are presented. The amount of data is currently still not sufficient for a final evaluation of the new measuring systems during field use, but the preliminary results concerning the reliability and accuracy of the measurements are promising. The experiences made at this first field test will be of great importance for the medium-term goal: the development of a market-ready, flexible, economic early warning system for landslides.
Austrian Journal of Earth Sciences Volume 102/2 Vienna 2009
Technische Universität München, Lehrstuhl für Ingenieurgeologie. Arcisstr. 21, 80333 München, Germany
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