%0 Conference Proceedings
%4 dpi.inpe.br/sbsr@80/2006/11.14.21.18
%2 dpi.inpe.br/sbsr@80/2006/11.14.21.18.20
%@isbn 978-85-17-00031-7
%T Uso de imagens Landsat como subsídio ao estudo da dispersão de sedimentos na região da foz do Rio São Francisco
%D 2007
%A Lorenzzetti, João Antonio,
%A Negri, Eduardo,
%A Knopers, Bastiaan,
%A Medeiros, Paulo Ricardo Petter,
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Universidade Federal Fluminense (UFF). Departamento de Geoquímica.
%@affiliation Universidade Federal Fluminense (UFF). Departamento de Geoquímica.
%@affiliation Universidade Federal de Alagoas (UFAL). IGDMA. Laboratórios Integrados de Ciências do Mar e Naturais (LABMAR).
%@electronicmailaddress loren@dsr.inpe.br
%@electronicmailaddress negri@dsr.inpe.br
%@electronicmailaddress geoknop@geoq.uff.br
%@electronicmailaddress prpm@fapeal.br
%E Epiphanio, José Carlos Neves,
%E Galvão, Lênio Soares,
%E Fonseca, Leila Maria Garcia,
%B Simpósio Brasileiro de Sensoriamento Remoto, 13 (SBSR).
%C Florianópolis
%8 21-26 abr. 2007
%I Instituto Nacional de Pesquisas Espaciais (INPE)
%J São José dos Campos
%P 3429-3436
%S Anais
%1 Instituto Nacional de Pesquisas Espaciais (INPE)
%K Suspended Sediments, coastal plume, Landsat , dam impacts, São Francisco River, Brasil.
%X The construction of a sequence of water reservoirs along the lower São Francisco river basin has caused a severe change in the supply of water and sediments to the coastal zone. We present in this paper a first attempt to use Landsat data to estimate de Suspended Sediment Content (SSC) of the coastal plume. A simple log model proposed by Tassan (1987) was used to convert the reflectance Landsat images (after proper atmospheric correction using the radiative transfer model 6S) into SSC maps. A comparison of Landsat derived and in situ measured SSC values indicate a good potential of using such methodology to support sediment dynamic studies being carried out by other groups in that region. An analysis of the SSC maps clearly shows that the coastal turbidity plume is being sustained by wind, wave and tidal current induced material resuspension originating from relict sedimentary deposits off the river mouth, rather than from river supply itself.
%9 Hidrologia e Recursos Hídricos
%@language pt
%3 3429-3436.pdf