Análise da variabilidade espacial e temporal dos sedimentos suspensos do alto rio Paraná via imagens orbitais : região de Porto São José - PR

Abstract

The construction of Porto Primavera dam (UHE Engineer Sergio Motta) in 1998 and its reservoir formed from the end of that year, caused alteration like suspended load reduction in the Paraná River downstream of the dam. This modified the water color and the transparency, as well as many other characteristics of the fluvial channel. For these reasons, verify the spatial and multidate variability of the suspended load of the Paraná River in the segment downstream of the Porto Primavera dam, next Porto São José - PR area through of spectral data of orbital images CBERS/2 is the mainly objective of this work. The methodology consists of the integration between spectral data and variable fluvial data as suspended load, bathymetry and speed of flow acquired in field collections in the same day that the satellite registered the images. The results indicate that for 12/11/05 field collection the variation of reflectance in the fluvial channel is connected with the total suspended load variability, evidenced mainly in bands 1 and 2. For the 13/05/06 field collect haven't had registering of images, however, the variation of total suspended load have connection with the water body spectral variation for scenes of some dates, evidenced in bands 1 and 2. The multidate analysis demonstrated the total suspended load variability in the channel between scenes of different dates showing the clear distinction between waters with influence and without influence of the Paranapanema River in the Paraná River. Finally, the work allowed the verification and applicability of the remote sensing for the sedimentary transport study, mainly in a poor suspended load river.