%0 Conference Proceedings
%4 dpi.inpe.br/sbsr@80/2008/11.14.00.00
%2 dpi.inpe.br/sbsr@80/2008/11.14.00.00.32
%@isbn 978-85-17-00044-7
%T Integração de dados do sistema automático de monitoramento de variáveis ambientais (SIMA) e de imagens orbitais na avaliação do estado trófico do Reservatório da UHE Funil
%D 2009
%A Novo, Evlyn Márcia Leão de Moraes,
%A Stech, José Luiz,
%A Londe, Luciana de Resende,
%A Assireu, Arcilan Trevenzoli,
%A Barbosa, Cláudio Clemente Faria,
%A Alcântara, Enner Herenio de,
%A Souza, Arley Ferreira de,
%@affiliation Instituto Nacional de Pesquisas Espaciais
%@affiliation Instituto Nacional de Pesquisas Espaciais
%@affiliation Instituto Nacional de Pesquisas Espaciais
%@affiliation Instituto Nacional de Pesquisas Espaciais
%@affiliation Instituto Nacional de Pesquisas Espaciais
%@affiliation Instituto Nacional de Pesquisas Espaciais
%@affiliation Instituto Nacional de Pesquisas Espaciais
%@electronicmailaddress evlyn@dsr.inpe.br
%@electronicmailaddress stech@dsr.inpe.br
%@electronicmailaddress londe@dsr.inpe.br
%@electronicmailaddress arcilan@dsr.inpe.br
%@electronicmailaddress claudio@dpi.inpe.br
%@electronicmailaddress enner@dsr.inpe.br
%@electronicmailaddress arley@dpi.inpe.br
%E Epiphanio, José Carlos Neves,
%E Galvão, Lênio Soares,
%B Simpósio Brasileiro de Sensoriamento Remoto, 14 (SBSR)
%C Natal
%8 25-30 abr. 2009
%I Instituto Nacional de Pesquisas Espaciais (INPE)
%J São José dos Campos
%P 4797-4804
%S Anais
%1 Instituto Nacional de Pesquisas Espaciais (INPE)
%K automatic monitoring systems, remote sensing, reservoir trophic state.
%X This paper describes the integration of data provided by automatic monitoring systems and satellite images for quick assessment of trophic state of reservoir water. Daily average of Chlorophyll (Chl) concentration from February, 2007 to February, 2008 was obtained with automatic monitoring systems moored at FUNIL reservoir. The data were processed to identify phytoplankton blooms which were defined by Chl concentration > 20mgl-1 and duration > 2 days. The dates of bloom were then used to select satellite images available during the episodes As revious results in cascade systems reservoirs indicated a good correlation between the Normalized Difference Vegetation Index (NDVI) and chlorophyll concentration, it as hypothesized that under eutrophic conditions the NDVI would be positive due to the high cell density near the surface. The selected image was processed to derive the NDVI for the reservoir and compared with chlorophyll concentration provided by the automatic system. The results showed that the NDVI is sensitive to changes in chlorophyll concentration in eutrophic systems as FUNIL reservoir and can be used for quick assessment of the area affected by nuisance blooms. Although preliminary, the results show the potential of integrating automatic collected in situ data and satellite images for assessment of aquatic system trophic state.
%9 Hidrologia
%@language pt
%3 4797-4804.pdf