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Can tilted trees be used for flood discharge estimaton?
Presented by Dr. Juan Antonio BALLESTEROS CáNOVAS on 17 May 2013 from 11:50 to 12:10
Type: Oral Presentation
Tilted trees have been widely used to date past hydrogeomorphic events. However, their usefulness to derive flood discharge has never been explored. We present a mechanical tree deformation–flood depth model to reconstruct flood peak discharge based on the rotational stem deformation. We combined dendrogeomorphic techniques, mechanic-structural and hydraulic approaches for this purpose. In addition, 3D georadar work has been carried out to define root-plate architecture. This model has been applied in trees tilted by floods and located in riverbanks next to gauge station. Results indicate that there is agreement between deformation and flood depth. Variability in results is related to tree age at the time of tilting and to signal-noise in deformation due to subsequent events. The added value of the censored data is still considerable since it helps the reconstruction of flood frequency in ungauged or poorly gauged catchment.
Room: Salon B
- Dr. Juan Antonio BALLESTEROS CáNOVAS Department of Research and Geoscientific Prospective, Geological Survey of Spain (IGME), Ríos Rosas 23, Madrid E-28003, Spain,
- Ms. Virginia RUIZ-VILLANUEVA Laboratory of Dendrogeomorphology, Institut of Geological Sciences, University of Berne, Baltzerstrasse 1+3, Berne, Switzerland
- Dr. Markus STOFFEL Laboratory of Dendrogeomorphology, Institut of Geological Sciences, University of Berne, Baltzerstrasse 1+3, Berne, Switzerland; Climatic Change and Climate Impacts, Institute for Environmental Sciences, University of Geneva, 7, chemin de Drize, CH-1227 Carouge-Geneva, Switzerland.
- Mr. Miguel Angel EGUIBAR Department of Hydraulic Engineering and Environment, Institute for Water and Environmental Engineering (IIAMA), Technical University of Valencia, Camino de Vera s/n, Valencia, E-46022, Spain
- Dr. Mauricio SáNCHEZ-SILVA ssociate Professor, Department of Civil and Environmental Engineering, Universidad de Los Andes, Bogotá Colombia