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Modelling woody material transport and deposition in alpine rivers

Author

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  • B. Mazzorana
  • J. Hübl
  • A. Zischg
  • A. Largiader

Abstract

Recent flood events in Switzerland and Western Austria in 2005 were characterised by an increase in impacts and associated losses due to the transport of woody material. As a consequence, protection measures and bridges suffered considerable damages. Furthermore, cross-sectional obstructions due to woody material entrapment caused unexpected flood plain inundations resulting in severe damage to elements at risk. Until now, the transport of woody material is neither sufficiently taken into account nor systematically considered, leading to prediction inaccuracies during the procedure of hazard mapping. To close this gap, we propose a modelling approach that (1) allows the estimation of woody material recruitment from wood-covered banks and flood plains; (2) allows the evaluation of the disposition for woody material entrainment and transport to selected critical configurations along the stream and that (3) enables the delineation of hazard process patterns at these critical configurations. Results from a case study suggest the general applicability of the concept. This contribution to woody material transport analysis refines flood hazard assessments due to the consideration of woody material transport scenarios. Copyright The Author(s) 2011

Suggested Citation

  • B. Mazzorana & J. Hübl & A. Zischg & A. Largiader, 2011. "Modelling woody material transport and deposition in alpine rivers," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 56(2), pages 425-449, February.
    • Handle: RePEc:spr:nathaz:v:56:y:2011:i:2:p:425-449
    DOI: 10.1007/s11069-009-9492-y
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    Cited by:

    1. B. Mazzorana & F. Comiti & C. Volcan & C. Scherer, 2011. "Determining flood hazard patterns through a combined stochastic–deterministic approach," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 59(1), pages 301-316, October.
    2. Elisabetta Persi & Gabriella Petaccia & Stefano Sibilla, 2018. "Large wood transport modelling by a coupled Eulerian–Lagrangian approach," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 91(1), pages 59-74, April.
    3. B. Mazzorana & F. Comiti & S. Fuchs, 2013. "A structured approach to enhance flood hazard assessment in mountain streams," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 67(3), pages 991-1009, July.

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