Vector representation of a complete urban drainage network for hydrological modelling at the whole city scale
ALLARD ; CHANCIBAULT ; ANDRIEU
Type de document
COMMUNICATION AVEC ACTES INTERNATIONAL (ACTI)
Langue
anglais
Auteur
ALLARD ; CHANCIBAULT ; ANDRIEU
Résumé / Abstract
Our purpose is to develop a hydro-meteorological model able to evaluate the influence of urbanization and rainwater management strategies at the whole city scale. It has to reproduce realistic hydrological cycle at long time scale. The model resolution must be coherent with the spatial and temporal scales. The under development model, TEB-Hydro (Météo-France surface scheme SURFEX) was chosen. It represents simplified production processes in urban areas, using a meshed discretization of the space with a detailed level adapted to the entire town. However, the transfer processes are not yet implemented in TEB-Hydro. Indeed, an integrated vision of all rainwater pathways in the city does not exist at the scale of the entire town. This paper aims to reproduce a simplified but full hydrographic network corresponding to this integrated vision. Even if more and more data are available (DTM, urban data base), our aim is to develop a methodology allowing to build this integrated rainwater pathways from available and robust data coherent with each other. The needed data are DTM, land use, sewer data. This methodology is applied on the eastern part of Nantes (France). The obtained simplified hydrographic networks compare well with the main structure of the ?real? network.
