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TerraHidro: A Distributed Hydrology Modelling System With High Quality Drainage Extraction

Authors:
Sergio Rosim
João Ricardo de Freitas Oliveira
Alexandre Copertino Jardim
Laércio Massaru Namikawa
Camilo Daleles Rennó

Keywords: local flow; distributed hydrological models; PFS method; drainage network

Abstract:
This paper presents the current development stage of TerraHidro, a Distributed Hydrology Modeling System created to design Geographic Information Systems (GIS) applications for water flow in hydrographical basins. TerraHidro proposes a different computational representation to deal with water flow in GIS applications. At first, this paper presents the conceptual model of TerraHidro, where the structure used to develop applications is independent from the structures used to extract local flow paths. Since the local flows are primary information for network drainage extractions, the Priority First Search (PFS) method used by TerraHidro to extract these local flows is presented here. PFS method also gives realistic results in flat areas and eliminates all spurious pits in the DEM data with small modifications in the elevation values. Examples of drainage networks are presented and a comparison between TerraHidro and ArcGIS Hydro Tools are presented.

Pages: 161 to 167

Copyright: Copyright (c) IARIA, 2013

Publication date: February 24, 2013

Published in: conference

ISSN: 2308-393X

ISBN: 978-1-61208-251-6

Location: Nice, France

Dates: from February 24, 2013 to March 1, 2013