Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/49376
Title: Influence of different relief information sources on the geomorphological characterization of small watersheds
Keywords: Advanced Spaceborne Emission and Reflection Radiometer
Digital Elevation Model
Geomorphological attributes
Shuttle Radar Topographic Mission
TOPO DEM
Radiômetro de Emissão Térmica e Reflexão Espacial Avançado
Modelo Digital de Elevação
Atributos geomorfológicos
Missão de Topografia do Radar de Transporte
Issue Date: Feb-2021
Publisher: Academia Brasileira de Ciências
Citation: MOURA, M. M. de et al. Influence of different relief information sources on the geomorphological characterization of small watersheds. Anais da Academia Brasileira de Ciências, Rio de Janeiro, v. 93, n. 3, e20191317, 2021. DOI: 10.1590/0001-3765202120191317.
Abstract: Mathematical models have been widely used to quantify hydrological processes for various practical purposes. These models depend on geomorphological attributes which are derived from relief information represented by Digital Elevation Models (DEM). The objective of this study was to evaluate the influence of relief information sources (ASTER, SRTM-30, SRTM-90, and TOPO) over geomorphological characterization of five Brazilian watersheds. Geoprocessing tools were applied for extraction of the following geomorphological attributes for each DEM: drainage area, perimeter, and watershed slope; length and slope of the main stream; total length of streams; bifurcation, stream length and stream area ratios; and length of the highest order stream. The differences in the values of attributes were calculated in relation to the reference DEM (TOPO). It was found that: i) slope of main stream and bifurcation ratio were the most sensitive parameters regarding the relief information source; ii) flat watersheds were more susceptible to altimetric errors; iii) ASTER did not adequately represent drainage networks for flat watersheds; and iv) the differences in the geomorphological attributes increased as drainage area decreased. The results indicate that DEM may exert influence on the use of hydrological models that depend on geomorphological attributes.
URI: http://repositorio.ufla.br/jspui/handle/1/49376
Appears in Collections:DEG - Artigos publicados em periódicos



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