Description: Das Projekt "Debris Flows as Natural Hazards - Along the Trans-Andean Corridor Mendoza-Valparaiso" wird vom Umweltbundesamt gefördert und von Universität Innsbruck, Institut für Geographie durchgeführt. Debris flows - defined as mixtures of water and sediment moving downwards a slope or channel - are frequent phenomena in mountain regions all around the globe. They contribute to a considerable risk when interfering with people or infrastructures. To enable action towards decreasing that risk it is essential to understand the physical background of debris flows and to develop simulation models for identifying hazardous areas. Master goal of this project is to provide a model framework, which enables the estimation of the spatial patterns of debris flow initiation (slope failure, channel erosion), movement, and deposition on the local scale (few square kms); includes the entire debris flow process, from triggering to runout and deposition; is publicly and freely available for experts who want to apply the model or to contribute to its further development. Model development is therefore based on the Open Source GIS software GRASS GIS, which appears to suit best for such a purpose. The model framework, named r.debrisflow, is mainly based on deterministic model approaches. The motion of the flow, however, is computed with a semi-deterministic model. In parallel, it was attempted to implement a fully deterministic model for the motion of granular flows into GRASS GIS. It was chosen to use the Savage-Hutter model, the GRASS module developed was named r.avalanche. The model frameworks are evaluated with and applied to selected slopes and small catchments along the international road from Mendoza (Western Argentina) to Central Chile. A detailed description and discussion of the methods and the results obtained up to now is given in the dissertation of Martin Mergili. The remaining project period will be dedicated to the implementation of a more sophisticated slope stability model (up to now, an infinite slope stability model is used) and an attempt to apply the findings for the local catchments to the regional scale, employing an artificial neural network.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Innsbruck ? Gerinne ? Süßgräser ? Wasserstraße ? Erosion ? Argentinien ? Chile ? Geografisches Informationssystem ? Software ? Mure ? Entwicklungsmodell ? Risikoanalyse ? Simulation ? Deposition ? Sediment ? Erdrutsch ? Wasser ? Modellierung ? Sedimentdynamik ? Naturgefahr ? Schuttstrom ? Infrastruktur ? Risiko ? Gebirge ? Hang ? Naturkatastrophe ? Ablagerung ? Deterministische Methode ? Fluss [Bewegung] ? Naturgefahren und Naturrisiken ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2008-02-01 - 2009-03-31
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