Publications des scientifiques de l'IRD

Braud I., Ayral P. A., Bouvier Christophe, Branger F., Delrieu G., Le Coz J., Nord G., Vandervaere J. P., Anquetin S., Adamovic M., Andrieu J., Batiot C., Boudevillain B., Brunet P., Carreau Julie, Confoland A., Didon-Lescot J. F., Domergue J. M., Douvinet J., Dramais G., Freydier R., Gérard S., Huza J., Leblois E., Le Bourgeois O., Le Boursicaud R., Marchand Pierre, Martin P., Nottale L., Patris Nicolas, Renard B., Seidel J. L., Taupin Jean-Denis, Vannier O., Vincendon B., Wijbrans A. (2014). Multi-scale hydrometeorological observation and modelling for flash flood understanding. Hydrology and Earth System Sciences, 18 (9), p. 3733-3761. ISSN 1027-5606.

Titre du document
Multi-scale hydrometeorological observation and modelling for flash flood understanding
Année de publication
2014
Type de document
Article référencé dans le Web of Science WOS:000343118500026
Auteurs
Braud I., Ayral P. A., Bouvier Christophe, Branger F., Delrieu G., Le Coz J., Nord G., Vandervaere J. P., Anquetin S., Adamovic M., Andrieu J., Batiot C., Boudevillain B., Brunet P., Carreau Julie, Confoland A., Didon-Lescot J. F., Domergue J. M., Douvinet J., Dramais G., Freydier R., Gérard S., Huza J., Leblois E., Le Bourgeois O., Le Boursicaud R., Marchand Pierre, Martin P., Nottale L., Patris Nicolas, Renard B., Seidel J. L., Taupin Jean-Denis, Vannier O., Vincendon B., Wijbrans A.
Source
Hydrology and Earth System Sciences, 2014, 18 (9), p. 3733-3761 ISSN 1027-5606
This paper presents a coupled observation and modelling strategy aiming at improving the understanding of processes triggering flash floods. This strategy is illustrated for the Mediterranean area using two French catchments (Gard and Ardeche) larger than 2000 km(2). The approach is based on the monitoring of nested spatial scales: (1) the hills-lope scale, where processes influencing the runoff generation and its concentration can be tackled; (2) the small to medium catchment scale (1-100 km(2)), where the impact of the network structure and of the spatial variability of rainfall, landscape and initial soil moisture can be quantified; (3) the larger scale (100-1000 km(2)), where the river routing and flooding processes become important. These observations are part of the HyMeX (HYdrological cycle in the Mediterranean EXperiment) enhanced observation period (EOP), which will last 4 years (2012-2015). In terms of hydrological modelling, the objective is to set up regional-scale models, while addressing small and generally ungauged catchments, which represent the scale of interest for flood risk assessment. Top-down and bottom-up approaches are combined and the models are used as "hypothesis testing" tools by coupling model development with data analyses in order to incrementally evaluate the validity of model hypotheses. The paper first presents the rationale behind the experimental set-up and the instrumentation itself. Second, we discuss the associated modelling strategy. Results illustrate the potential of the approach in advancing our understanding of flash flood processes on various scales.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020] ; Hydrologie [062]
Description Géographique
FRANCE
Localisation
Fonds IRD [F B010062628]
Identifiant IRD
fdi:010062628
Contact