文章基本信息

标题：DERIVAÇÃO DE REDE DE DRENAGEM A PARTIR DE DADOS DO SRTM / DERIVING DRAINAGE NETWORK FROM SRTM DATA
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作者：Adriano Rolim da Paz ; Walter Collischonn
期刊名称：Revista Geográfica Acadêmica
印刷版ISSN：1678-7226
出版年度：2008
卷号：2
期号：2
页码：84-95
出版社：Universidade Federal de Goiás
摘要：The development and improvement of Geographic Information Systems and geoprocessing algorithms,together with the increase in computational capacity and data availability from remote sensing, becamepossible to prepare information for hydrologic studies of large areas with relative low cost and incrediblespeed. This paper describes the use of SRTM data to derive drainage network and related products, suchas accumulated drainage areas and river lengths, with application to the Uruguay river basin. Six distinctDigital Elevation Models (DEMs) were used, varying the spatial resolution and applying the stream burningpre-processing technique. The main limitations of the DEM-derived drainage network refer to the incapacityof representing river meanders that are smaller than the pixel size and the problem of artificial sinuosity thatoccurs when the width of the river is larger than pixel side.
关键词：Digital elevation model ; hydrologic modeling ; flow directions