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Embedding landscape processes into triangulated terrain models / E.R. Vivoni in International journal of geographical information science IJGIS, vol 19 n° 4 (april 2005)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 19 n° 4 (april 2005) . - pp 429 - 457 Titre : Embedding landscape processes into triangulated terrain models Type de document : Article/Communication Auteurs : E.R. Vivoni, Auteur ; V. Teles, Auteur ; V.Y. Ivanov, Auteur ; R.L. Bras, Auteur ; Dara Entekhabi, Auteur Année de publication : 2005 Article en page(s) : pp 429 - 457 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] bassin hydrographique [Termes IGN] discrétisation spatiale [Termes IGN] érosion hydrique [Termes IGN] géomorphologie [Termes IGN] modèle de simulation [Termes IGN] pente [Termes IGN] prédiction [Termes IGN] ruissellement [Termes IGN] simulation [Termes IGN] système d'information géographique [Termes IGN] topographie [Termes IGN] Triangulated Irregular Network [Termes IGN] triangulation locale Résumé : (Auteur) Triangulated irregular networks (TIN) can form the basis for multiple-resolution representations in distributed hydrogeomorphic simulations over complex basins. Current methods for deriving TIN meshes depend primarily on surface slope without considering other terrain attributes significant to the watershed response such as the specific basin area. As an alternative, we present a methodology for combining a hydrogeomorphic or landscape index with an unstructured triangulated mesh. Landscape indices provide a concise method for describing steady-state terrain processes by isolating the dominant physical factors. The mesh-generation algorithm results in an adaptive discretization that resembles the spatial pattern of the landscape index with a high resolution retained in areas expected to impact the basin response. We compare the proposed algorithm with a slope-preserving method as a means for initializing the terrain representation in two TIN-based hydrogeomorphic models. Through three case studies in saturation-excess runoff, transport-limited soil erosion and shallow landslide simulation, we assess the distributed model sensitivity to the triangulated terrain algorithm. Model comparisons reveal that the process-based triangulations focus the distributed simulation in regions anticipated via a steady-state index to affect the transient watershed response. Numéro de notice : A2005-098 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810512331325111 En ligne : https://doi.org/10.1080/13658810512331325111 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27236 [article]

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