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Le réseau hydrographique théorique (RHT) français et ses attributs environnementaux

Abstract : The theoretical hydrographical network (RHT) is a new digital hydrographical network derived from the BD Alti® digital elevation model of the French Geographic National Institute (IGN). We used the 'Agree' method to build the RHT network. This method modifies the topography of the digital elevation model to make it consistent with a vector coverage corresponding to the observed stream network. Specifically, the RHT is developed from the BD Alti® modified by the RHE network, the latter being a joined and oriented simplification of the observed hydrographical network of the IGN, BD Carthage®. The consistency between the RHT and the BD Alti® enables a precise identification of catchments and improved simulations of flows. This approach enables the integration of several spatial attributes and their accumulation along the network. We calculated various topologic, hydrologic and climatic attributes for the RHT and integrated them in a geographic information system. Comparisons and tests have been made to evaluate the new hydrographical network and its environmental attributes. The network has many potential applications associated with integrated basin management.
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Submitted on : Friday, October 30, 2015 - 4:23:32 PM
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H. Pella, Jérôme Lejot, N. Lamouroux, T. Snilder. Le réseau hydrographique théorique (RHT) français et ses attributs environnementaux. Géomorphologie, 2012, 3, pp.317-336. ⟨10.4000/geomorphologie.9933⟩. ⟨halshs-01222819⟩



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