Flowpaths are significantly affected by land use change and engineered elements across urban catchments. Conventional GIS-based tools for extracting drainage networks were not developed for urban terrains. This work presents Geo-PUMMA, a GIS toolbox to generate vectorial meshes for terrain representation in distributed hydrological modeling, and to...
Published in La Houille Blanche
L'augmentation des surfaces imperméables et les modifications des chemins d'écoulement de l'eau par les réseaux d'assainissement unitaires et pluviaux ont un impact sur l'hydrologie des bassins versants. Les bassins périurbains, qui s'urbanisent rapidement, y sont particulièrement sensibles. Les outils de modélisation hydrologique spatialisés, simu...
Des travaux précédents, réalisés avec un modèle hydrologique distribué initialement conçu pour les bassins ruraux, le modèle J2000 appliqué au pas de temps journalier, ont permis de mettre en évidence l'impact de l'augmentation des surfaces imperméables sur la composition des écoulements du bassin versant de l'Yzeron. Ce pas de temps étant peu effi...
Urban growth affects mostly the periphery of large cities, leading to catchments which are a mixture of rural and urban areas, so-called periurban catchments. Increase imperviousness and the setup of various networks (drinking water, sewer systems) lead to the modification of the hydrological cycle components and of water pathways in those catchmen...
L'augmentation des surfaces imperméables et les modifications des chemins d'écoulement de l'eau par les réseaux d'assainissement unitaires et pluviaux ont un impact sur l'hydrologie des bassins versants. Les bassins périurbains, qui s'urbanisent rapidement, y sont particulièrement sensibles. Les outils de modélisation hydrologique spatialisés, simu...
Precipitation is the key factor controlling the high-frequency hydrological response in catchments, and streamflow simulation is thus dependent on the way rainfall is represented in a hydrological model. A characteristic that distinguishes distributed from lumped models is the ability to explicitly represent the spatial variability of precipitation...
The estimation of catchment-scale soil properties, such as water storage capacity and hydraulic conductivity, is of primary interest for the implementation of distributed hydrological models at the regional scale. This estimation is generally done on the basis of information provided by soil databases. However, such databases are often established ...
Distributed hydrological models rely on a spatial discretization composed of homogeneous units representing different areas within the catchment. Hydrological Response Units (HRUs) typically form the basis of such a discretization. HRUs are generally obtained by intersecting raster or vector layers of land uses, soil types, geology and sub-catchmen...
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