Please use this identifier to cite or link to this item: http://hdl.handle.net/2067/1419
Title: Hydrogeomorphic properties of simulated drainage patterns using digital elevation models: the flat area issue
Authors: Nardi, Fernando
Grimaldi, Salvatore
Santini, Monia
Petroselli, Andrea 
Ubertini, Lucio
Keywords: Flow direction;Digital elevation model (DEM);Stream network mapping;Depression;Flat area;Contributing area;Geographic information system (GIS);Terrain analysis
Issue Date: 2008
Publisher: Taylor & Francis
Source: Nardi et al. 2008. Hydrogeomorphic properties of simulated drainage patterns using digital elevation models: the flat area issue. "Hydrological Sciences Journal" 53 (6): 1176-1193
Abstract: 
Flat areas are a critical issue for the characterization of drainage patterns using digital elevation models (DEM). In this work, flat area removal and flow direction algorithms are implemented, and also a
physically-based DEM correction model is introduced, for investigating their influence on the topological properties of the channel network, the Hortonian parameters and the hillslope width function. Differences of results, as compared to the standard procedures implemented in widely-used GIS-based hydrological packages, show the importance for hydrogeomorphic modellers to consider the use of more detailed approaches.

Les zones planes sont problématiques pour l’interprétation des modèles numériques de terrain
(MNT) en termes de caractérisation des réseaux de drainage. Dans cette étude, des algorithmes de
suppression des zones planes et d’analyse des directions d’écoulement sont implémentés, dont un nouveau
modèle à bases physiques de correction de MNT, afin d’étudier leur influence sur les propriétés topologiques
du réseau hydrographique, les paramètres de Horton et la fonction largeur de versant. Les différences de
résultats, lors de la comparaison avec les procédures standard implémentées dans les modules hydrologiques
courants sous SIG, montrent l’importance pour les modélisateurs hydro-géomorphologues d’envisager
d’utiliser des approches plus détaillées.
Description: 
L'articolo è disponibile sul sito dell'editore http://www.tandfonline.com/
URI: http://hdl.handle.net/2067/1419
ISSN: 2150-3435
DOI: 10.1623/hysj.53.6.1176
Appears in Collections:GEMINI - Archivio della produzione scientifica

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