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THE GESTRANS PROJECT Taking into account changing alluvial channels in flood risk assessment

N° ANR-09-RISK-004/GESTRANS. THE GESTRANS PROJECT Taking into account changing alluvial channels in flood risk assessment. N° ANR-09-RISK-004/GESTRANS. Duration: 4 years (2010-2014) Partners Cemagref Laboratoire de Transfert en Hydrologie et Environnement CNRS UMR5600

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THE GESTRANS PROJECT Taking into account changing alluvial channels in flood risk assessment

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  1. N° ANR-09-RISK-004/GESTRANS THE GESTRANS PROJECT Taking into account changing alluvial channels in flood risk assessment

  2. N° ANR-09-RISK-004/GESTRANS Duration: 4 years (2010-2014) Partners Cemagref Laboratoire de Transfert en Hydrologie et Environnement CNRS UMR5600 Institut de Physique du Globe de Paris Direction Départementale des Territoires de l’Isère Université de Colombie Britannique https://gestrans.cemagref.fr/

  3. N° ANR-09-RISK-004/GESTRANS The River The people and A challenge… Make compatible the short-term flood risk assessment and the long-term environmental objectives (DCE 2000/60/CE) Overcome individualism…a decision motivated by considerations on the entire river catchment may locally be poorly understood and accepted by floodplain inhabitants … and acceptance problem: even the best technical solutions may be inefficient if they are not well explained …. and conflicting objectives : for instance when a sediment deposit, which is fully part of the river equilibrium (or disequilibrium), locally modifies the river section’s flow capacity

  4. N° ANR-09-RISK-004/GESTRANS

  5. N° ANR-09-RISK-004/GESTRANS Thursday Rivières en Tresses (funding by Water Agency RMC) « Créateur de Drôme » «Sediphone » with WSL John Laronne Fellowship photograph enquiries and regional daily press analysis Are the variations in flood risk assessment related to professional characteristics? => semi-directed interviews Braiding Rivers trajectory (long term changes, regional diversity, role of vegetation…). => Aerial photograph analysis => Flume experiments A field-based investigation of macroforms mobility => Multidate Airborne LiDAR surveys Hydrophone (1 thesis) Bedload measurements (HS, Sediment traps) Flume experiments (Thesis IPGP, Cemagref) Saint-Venant Cellular automata More collaborations ?

  6. N° ANR-09-RISK-004/GESTRANS This workshop: The first of a 4 years project Objectives: Facilitate interactions between researchers Presentation of the project (to stakeholders) Encourage (new) collaborations The place: Ancien Monastère de Sainte-Croix The staff: Programm: Day 1: Invited speakers (English) Day 2: The « Braided river » project / Field trip Day 3: Geosciences and social stakes interactions

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