@InProceedings{CardozoPeSiSiShMo:2009:DiÁrAl,
               author = "Cardozo, Francielle da Silva and Pereira, Gabriel and Silva, 
                         Gustavo Bayma Siqueira da and Silva, Fabricio Brito and 
                         Shimabukuro, Yosio Edemir and Moraes, Elisabete Caria",
          affiliation = "{} and {} and {} and {} and {} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Discrimina{\c{c}}{\~a}o de {\'a}reas alagadas no Pantanal 
                         sul-matogrossense a partir de imagens",
            booktitle = "Anais...",
                 year = "2009",
               editor = "Agropecu{\'a}ria, Embrapa Inform{\'a}tica",
                pages = "p.99--106",
         organization = "2º Simp{\'o}sio de Geotecnologias no Pantanal",
            publisher = "Embrapa Inform{\'a}tica Agropecu{\'a}ria",
              address = "Campinas",
             keywords = "Normalized difference water index (NDWI), {\'a}reas inundadas, 
                         sat{\'e}lites orbitais.",
             abstract = "O {\'{\i}}ndice de vegeta{\c{c}}{\~a}o Normalized Difference 
                         Water Index (NDWI) {\'e} relacionado com o conte{\'u}do de 
                         {\'a}gua presente nas folhas, podendo ser adquirido pela 
                         combina{\c{c}}{\~a}o de bandas dos sat{\'e}lites orbitais. O 
                         Pantanal {\'e} uma das maiores plan{\'{\i}}cies de 
                         sedimenta{\c{c}}{\~a}o sujeita a inunda{\c{c}}{\~o}es do 
                         mundo, os quais determinam alagamentos peri{\'o}dicos. Sendo 
                         assim, foi utilizado o {\'{\i}}ndice NDWI para identificar as 
                         {\'a}reas alagadas no Pantanal Sul-Matogrossense correspondente 
                         {\`a} {\'o}rbita-ponto 226-73 do sat{\'e}lite Landsat. Foram 
                         utilizadas imagens do sensor TM/Landsat-5 dos dias 26/03/2007 
                         (esta{\c{c}}{\~a}o chuvosa) e 05/07/2009 (esta{\c{c}}{\~a}o 
                         seca), e imagens do sensor MODIS/Terra dos dias 27/03/2007 e 
                         06/07/2009. Para a elabora{\c{c}}{\~a}o do {\'{\i}}ndice NDWI 
                         foram selecionadas as bandas 4 e 5 do sensor TM e as bandas 2 e 7 
                         do sensor MODIS. Os resultados mostraram que os valores de NDWI de 
                         ambos os sensores foram estimados diferentemente, superestimando 
                         as {\'a}reas correspondentes aos cursos d{\'a}gua ou {\'a}reas 
                         alagadas nas {\'e}pocas de esta{\c{c}}{\~a}o seca. Al{\'e}m 
                         disso, os valores de NDWI para {\'a}reas de savanas apresentaram 
                         valores altos em {\'e}pocas chuvosas, diminuindo em {\'e}pocas 
                         secas; as {\'a}reas dos cursos d{\'a}gua apresentaram valores 
                         baixos em {\'e}pocas chuvosas, aumentando em {\'e}pocas secas; e 
                         as {\'a}reas de vegeta{\c{c}}{\~a}o que acompanham a rede de 
                         drenagem apresentaram valores intermedi{\'a}rios em ambas as 
                         esta{\c{c}}{\~o}es. Por fim, notou-se que o sensor TM se mostrou 
                         um pouco mais eficaz na identifica{\c{c}}{\~a}o das {\'a}reas 
                         alagadas do que o sensor MODIS devido as suas 
                         caracter{\'{\i}}sticas espaciais e espectrais. ABSTRACT: The 
                         Normalized Difference Water Index (NDWI) is a vegetation index 
                         related to the water content in the leaves, obtained by combining 
                         bands of orbital satellites. The Pantanal is one of the largest 
                         sedimentary plains of floodplain in the world, with periodic 
                         flooding. Thus, the NDWI was used to identify the flooded areas in 
                         the Pantanal region corresponding to the Landsat 226-73 path-row. 
                         TM/Landsat-5 images from 27/03/2007 (wet season) and 06/07/2009 
                         (dry season), and MODIS/Terra images from 27/03/2007 and 
                         06/07/2009 were used in this work. To develop NDWI index were used 
                         bands 4 and 5 from TM sensor and bands 2 and 7 from MODIS sensor. 
                         The results showed that the sensors estimated differently the NDWI 
                         values, overestimating the areas corresponding to water courses or 
                         wetlands in periods of dry season. Moreover, the NDWI values of 
                         savanna areas showed higher values during rainy season, decreasing 
                         during the dry period; areas of the water courses showed low 
                         values during wet season, increasing during dry periods; and the 
                         areas of vegetation close to the water courses showed intermediary 
                         values in both seasons. Finally, it was noted that the TM sensor 
                         showed somewhat more effective in identifying wetlands than the 
                         MODIS sensor due to their spatial and spectral characteristics.",
  conference-location = "Corumb{\'a}, MS",
      conference-year = "7 a 11 de novembro de 2009",
             language = "pt",
         organisation = "Embrapa Inform{\'a}tica Agropecu{\'a}ria e Inpe",
           targetfile = "p141.pdf",
        urlaccessdate = "12 maio 2024"
}