Spatial and temporal dynamic of the trophic state in a large Amazonian hydroelectric reservoir

We assessed the spatial and temporal dynamic of the trophic state in a large Amazonian hydroelectric reservoir during the Austral wintertime using images acquired by the Operational Land Imager (OLI) sensor on board the Landsat 8 satellite. We used the Spectral Angle Mapper (SAM) algorithm and refer...

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Bibliographic Details
Main Authors: Curtarelli, M. P., Ogashawara, I., Alcantara, E. H., Lorenzzetti, J. A., Stech, J. L.
Format: Conference Proceeding
Language:English
Subjects:
Amazon
Classification algorithms
Earth
Heuristic algorithms
hydroelectric reservoir
Monitoring
Remote sensing
Reservoirs
Satellites
spectral angle mapper
trophic state index
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Summary:We assessed the spatial and temporal dynamic of the trophic state in a large Amazonian hydroelectric reservoir during the Austral wintertime using images acquired by the Operational Land Imager (OLI) sensor on board the Landsat 8 satellite. We used the Spectral Angle Mapper (SAM) algorithm and reference in situ spectra to classify the OLI images according to a trophic state index (TSI). The results showed that the use of OLI images and the SAM algorithm were suitable for the mapping of the TSI in the Amazonian reservoirs. In our particular case, the reservoir presented a high spatial and temporal heterogeneity in the TSI during the studied period. However, further studies are needed to better characterize the dynamics of the trophic state and its driven forces.
ISSN:2153-6996
2153-7003
DOI:10.1109/IGARSS.2014.6946568