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Gewählte Master / Diploma Thesis:

Master / Diploma Thesis - Institut für Alpine Naturgefahren (IAN), BOKU-Universität für Bodenkultur, pp 118. UB BOKU obvsg

Data Source: ZID Abstracts
Debris flows are one of the biggest natural threats in Alpine regions. They are amongst those natural hazards, on which we have only limited knowledge of their occurrence, flow and deposition behavior. Monitoring systems can help to better understand these physical processes. In particular the vertical velocity profile, which was previously measured only on the basis of laboratory tests, provides information about the internal mechanics of debris flows. Kaitna et al. (2014) developed a measuring system which measures the speed of a granular mixture in a laboratory environment. In the present work this measuring system was adapted for the use in the field. For this adaptation two simulation tests were undertaken in the laboratory of the Institute of Alpine Natural Hazards (IAN). The boundary conditions were adjusted to mirror near-natural events. The data resulting from the laboratory tests were evaluated, a first prototype was designed and afterwards installed in a monitoring station in the Gadriabach in South Tyrol (Italy). The first velocity profiles of a debris flow event, which took place on 10.07.2017, were recorded. The results of the measuring system from the laboratory show to some extent a small deviation from a reference value. Some behavioral patterns were identified in the measurement principle and thus the first evaluation proposals were identified. In order to create a compact evaluation method of this measurement principle, one would have to generate significantly more data to better recognize outliers. In general, this process has very large potential, so further investigations should be conducted.

Beurteilende(r): Kaitna Roland
1.Mitwirkender: Hübl Johannes

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