Water Basin Delimitation in a Relief Transition Region
Ficher, Kevin Pereira, Donizete Almeida, André Oliveira, Josiane
Water Basin Delimitation in a Relief Transition Region
Publicação on-line; 26 ref.; 2 tables; 7 illus.; Summary (En)
ABSTRACT
The objective of this work was to evaluate the performance accuracy of digital elevation models
in delimiting a water basin located in the relief transition region between the São Francisco
Plateau, São Franciscana Depression and the Espinhaço mountain range. Four digital elevation
models with data from the Shuttle Radar Topographic Mission (SRTM) and map topography were
generated using the Topo To Raster interpolator with and without support from hydrography maps
(IBGE), and another with the original SRTM data. For each digital elevation model, its accuracy
was evaluated for representing: the drainage, the hydrography and basin mouth in comparison
to the references obtained from IBGE maps. The models generated with SRTM and topographic
data supported by hydrography maps showed good performance, with small delimitation errors
in the water basin. Those generated without support from hydrography maps showed gross
errors due to non-representation of the hydrography in the São Franciscana Depression region.
Keywords: SRTM, topographic maps, interpolation.
MAPA
LEVANTAMENTO TOPOGRÁFICO
BACIA HIDROGRÁFICA
Water Basin Delimitation in a Relief Transition Region
Publicação on-line; 26 ref.; 2 tables; 7 illus.; Summary (En)
ABSTRACT
The objective of this work was to evaluate the performance accuracy of digital elevation models
in delimiting a water basin located in the relief transition region between the São Francisco
Plateau, São Franciscana Depression and the Espinhaço mountain range. Four digital elevation
models with data from the Shuttle Radar Topographic Mission (SRTM) and map topography were
generated using the Topo To Raster interpolator with and without support from hydrography maps
(IBGE), and another with the original SRTM data. For each digital elevation model, its accuracy
was evaluated for representing: the drainage, the hydrography and basin mouth in comparison
to the references obtained from IBGE maps. The models generated with SRTM and topographic
data supported by hydrography maps showed good performance, with small delimitation errors
in the water basin. Those generated without support from hydrography maps showed gross
errors due to non-representation of the hydrography in the São Franciscana Depression region.
Keywords: SRTM, topographic maps, interpolation.
MAPA
LEVANTAMENTO TOPOGRÁFICO
BACIA HIDROGRÁFICA
BINAGRI