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Contribution à la spatialisation du modèle opérationnel de prévision des crues éclair ALHTAÏR

Abstract : The flood forecasting model ALHTAÏR is developed for five years by the flood-warning service: Service d'Annonce des Crues du Gard (SAC-30). This model, with an operational orientation, aims al a flood hydrograph for each location of the rivers for the supervision area of the SAC-30, in a real time processing. Two versions of this flood forecasting model exist. The first one, ALHTAÏR in "watershed" mode, allows to affect the model parameters by catchment area. The second version, ALHTAÏR in "spatialised" mode, allows to realize a model calibration according to the catchment area characteristics such as the infiltration capacity. This paper proposes the contribution to the establishment of flash floods forecasting model version. Experimental and spatial analyses have been proposed. Cartography of the permeability on Gardon d'Anduze watershed was realized. Tests of this cartography with ALHTAÏR in "spatialised" mode show the interest of this approach provided that the methodology is refined to realize the cartography of the permeability and the model calibration. Further researches are required to consider an expansion of the use of ALHTAÏR in "spatialised" mode to the whole area under supervision of the SAC-30 and more especially to the non-gauged watersheds.
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https://hal.mines-ales.fr/hal-02937767
Contributor : Administrateur Imt - Mines Alès <>
Submitted on : Monday, September 14, 2020 - 1:46:50 PM
Last modification on : Wednesday, September 16, 2020 - 3:07:17 AM

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  • HAL Id : hal-02937767, version 1

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Pierre-Alain Ayral, Sophie Sauvagnargues, François Bressand. Contribution à la spatialisation du modèle opérationnel de prévision des crues éclair ALHTAÏR. Etudes de Géographie Physique, UMR 6012 "ESPACE" - Équipe G.V.E. 2005. ⟨hal-02937767⟩

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