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Debris-flow activity in five adjacent gullies in a limestone mountain range Cover

Debris-flow activity in five adjacent gullies in a limestone mountain range

Open Access
|Mar 2015

Abstract

Debris-flows are infrequent geomorphic phenomena that shape steep valleys and can repre-sent a severe hazard for human settlements and infrastructure. In this study, a debris-flow event chro-nology has been derived at the regional scale within the Gesäuse National Park (Styria, Austria) using dendrogeomorphic techniques. Sediment sources and deposition areas were mapped by combined field investigation and aerial photography using an Unmanned Aerial Vehicle (UAV). Through the analysis of 384 trees, a total of 47 debris-flows occurring in 19 years between AD 1903 and 2008 were identified in five adjacent gullies. Our results highlight the local variability of debris-flow activi-ty as a result of local thunderstorms and the variable availability of sediment sources.

Language: English
Submitted on: May 27, 2014
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Accepted on: Feb 6, 2015
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Published on: Mar 27, 2015
Published by: Sciendo
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2015 Klaus Schraml, Markus Oismüller, Markus Stoffel, Johannes Hübl, Roland Kaitna, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.