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by Braud, I., Ayral, P.-A., Bouvier, C., 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, J., 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, P., Martin, P., Nottale, L., Patris, N., Renard, B., Seidel, J.-L., Taupin, J.-D., Vannier, O., Vincendon, B. and Wijbrans, A.
Abstract:
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 Ardèche) larger than 2000 km2. The approach is based on the monitoring of nested spatial scales: (1) the hillslope scale, where processes influencing the runoff generation and its concentration can be tackled; (2) the small to medium catchment scale (1–100 km2) 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 km2) 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) and lasts four years (2012–2015). In terms of hydrological modelling the objective is to set up models at the regional scale, while addressing small and generally ungauged catchments, which is the scale of interest for flooding 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 at various scales.
Reference:
Braud, I., Ayral, P.-A., Bouvier, C., 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, J., 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, P., Martin, P., Nottale, L., Patris, N., Renard, B., Seidel, J.-L., Taupin, J.-D., Vannier, O., Vincendon, B. and Wijbrans, A., 2014: Multi-scale hydrometeorological observation and modelling for flash-flood understandingHydrology and Earth System Sciences, 18, 3733-3761.
Bibtex Entry:
@Article{Braud2014,
  Title                    = {Multi-scale hydrometeorological observation and modelling for flash-flood understanding},
  Author                   = {Braud, I. and Ayral, P.-A. and Bouvier, C. and Branger, F. and Delrieu, G. and Le Coz, J. and Nord, G. and Vandervaere, J.-P. and Anquetin, S. and Adamovic, M. and Andrieu, J. and Batiot, C. and Boudevillain, B. and Brunet, P. and Carreau, J. and Confoland, A. and Didon-Lescot, J.-F. and Domergue, J.-M. and Douvinet, J. and Dramais, G. and Freydier, R. and G\'erard, S. and Huza, J. and Leblois, E. and Le Bourgeois, O. and Le Boursicaud, R. and Marchand, P. and Martin, P. and Nottale, L. and Patris, N. and Renard, B. and Seidel, J.-L. and Taupin, J.-D. and Vannier, O. and Vincendon, B. and Wijbrans, A.},
  Journal                  = {Hydrology and Earth System Sciences},
  Year                     = {2014},
  Pages                    = {3733-3761},
  Volume                   = {18},

  Abstract                 = {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 Ardèche) larger than 2000 km2. The approach is based on the monitoring of nested spatial scales: (1) the hillslope scale, where processes influencing the runoff generation and its concentration can be tackled; (2) the small to medium catchment scale (1–100 km2) 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 km2) 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) and lasts four years (2012–2015). In terms of hydrological modelling the objective is to set up models at the regional scale, while addressing small and generally ungauged catchments, which is the scale of interest for flooding 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 at various scales.},
  Copublication            = {36: 36 Fr},
  Doi                      = {10.5194/hess-18-3733-2014},
  Owner                    = {hymexw},
  Timestamp                = {2016.01.08},
  Url                      = {http://www.hydrol-earth-syst-sci.net/18/3733/2014/hess-18-3733-2014.pdf}
}