Documentation Wartschenbach 1997 (Debris flow warning systems)
Abstract
Passive temporary measures like debris flow warning systems have not been applied yet in Austria as a protection against debris flows. However, in an international context, they are an important tool for the reduction of the total risk regarding debris flow events. In China and Japan for instance, where due to volcanic activity and earthquakes etc. the people are more aware of debris flows, the studies regarding debris flow warning have been intensified and successfully applied in practise since the eighties. By means of the Austrian torrential study area “Wartschenbach”, a literature research should show the possible application of these warning systems in Austria and provide the necessary information to conduct a study of scenarios regarding applicable measurement and communication technique for warning systems. First of all, the requirements of such a warning system have to be defined and their feasibility has to be proven. Furthermore, it is important to know how the process characteristics of the debris flow event are influencing the spatial distribution of the sensor system to guarantee a reasonable forecast lead time. Extensive fieldworks have already been conducted in the course of the project DOMODIS in the summer of 1997 to define these process characteristics. The current study should show the advantages and disadvantages of warning systems already applied and evaluate them regarding relevant parameters (structural and economical ones). Furthermore, the sensors to measure triggering factors (weather radar and precipitation gauges etc.) as well as event factors (pressure sensor, ultrasound and geophone etc.) will be described in detail. Finally, the possible use of the event data gathered by warning systems should be discussed and the range of application of warning systems in Austria will be overviewed.
keywords debris flow warning system
Publikationen
Dokumentation Wartschenbach, IAN Report 52
Autoren: Hübl, J; Ganahl, E; Moser, M; Schnetzer, I Jahr: 2002
Forschungsbericht (extern. Auftraggeber)
Project staff
Johannes Hübl
Univ.Prof. Dipl.-Ing. Dr.nat.techn. Johannes Hübl
johannes.huebl@boku.ac.at
Tel: +43 1 47654-87111
Project Leader
28.12.1998 - 31.12.2003