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An efficient domain decomposition framework for accurate representation of geodata in distributed hydrologic models / Muneendra Kumar in International journal of geographical information science IJGIS, vol 23 n°11-12 (november 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°11-12 (november 2009) . - pp 1569 - 1596 Titre : An efficient domain decomposition framework for accurate representation of geodata in distributed hydrologic models Type de document : Article/Communication Auteurs : Muneendra Kumar, Auteur ; G. Bahtt, Auteur ; C. Duffy, Auteur Année de publication : 2009 Article en page(s) : pp 1569 - 1596 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] décomposition spatiale [Termes IGN] hydrogéologie [Termes IGN] hydrographie de surface [Termes IGN] modèle hydrographique [Termes IGN] objet géographique [Termes IGN] visualisation de données [Vedettes matières IGN] Géovisualisation Résumé : (Auteur) Physically-based, fully-distributed hydrologic models simulate hydrologic state variables in space and time while using information regarding heterogeneity in climate, land use, topography and hydrogeology. Since fine spatio-temporal resolution and increased process dimension will have large data requirements, there is a practical need to strike a balance between descriptive detail and computational load for a particular model application. In this paper, we present a flexible domain decomposition strategy for efficient and accurate integration of the physiographic, climatic and hydrographic watershed features. The approach takes advantage of different GIS feature types while generating high-quality unstructured grids with user-specified geometrical and physical constraints. The framework is able to anchor the efficient capture of spatially distributed and temporally varying hydrologic interactions and also ingest the physical prototypes effectively and accurately from a geodatabase. The proposed decomposition framework is a critical step in implementing high quality, multiscale, multiresolution, temporally adaptive and nested grids with least computational burden. We also discuss the algorithms for generating the framework using existing GIS feature objects. The framework is successfully being used in a finite volume based integrated hydrologic model. The framework is generic and can be used in other finite element/volume based hydrologic models. Copyright Taylor & Francis Numéro de notice : A2009-521 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810802344143 En ligne : https://doi.org/10.1080/13658810802344143 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30150 [article]

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