Identificacao de Areas Submetidas a Inundacao Atraves de Imagens TM/Landsat NASBacias DOS Rios Pindare, Mearim, Jaguaribe, Apodi, Piranhas E Sao Francisco (Identification of Areas Subject to Flooding Through TM/LANDSAT Images in the Basin of the Rivers Pi

摘要

Analog LANDSAT-TM images for both normal and flood discharge were used to mapthose areas subject to inundation along the floodplain of rivers Pindare, Mearim, Jaguaribe, Apodi, Piranhas and San Francisco (NE of Brazil). Analog images (b/w) at bands TM-3 and TM-4, at the scale 1:100,000, as well as positive color transparencies at 1:100,000, band 3 (blue), 5 green), 4 (red), were 1:100,000 using the PROCOM-2 system. Multispectral, multitemporal and multitemporal-multispectral color composites were obtained from digital TM data. The digital processing was carried out at test sites in a selected section in the Jaguaribe river floodplain. The result of this study is a set (collection) of 25 thematic maps at 1:100,000, showing flooded areas during the flood of 1985.