@Article{SouzaFoPara:2003.:UsSyAp,
               author = "Souza Filho, Pedro Walfir Martins and Paradella, Waldir Renato",
                title = "Use of Synthetic Aperture Radar Images for Recognition of Coastal 
                         Geomorphological Features, Land-Use Assessment and Shoreline 
                         Changes in Bragan{\c{c}}a Coast, Par{\'a}, Northern Brazil",
              journal = "Anais da Academia Brasileira de Ci{\^e}ncias",
                 year = "2003.",
               volume = "75",
               number = "3",
                pages = "341 - 356",
                month = "set.",
             keywords = "geomorphology, coastal changes, remote sensing, mangrove, Amazon, 
                         geomorfologia, mudan{\c{c}}as costeiras, manguezal.",
             abstract = "Synthetic Aperture Radar (SAR) images are being used more 
                         extensively than ever before for geoscience applications in the 
                         moist tropics. In this investigation, a RADARSAT1-1 C-HH SAR image 
                         acquired in 1998 was used for coastal mapping and land-cover 
                         assessment in the Bragan{\c{c}}a area, in the northern Brazil. 
                         The airborne GEMS 1000 X-HH radar image acquired in 1972 during 
                         the RADAM Project was also used for evaluating coastal changes 
                         occurring over the last three decades. The research has confirmed 
                         the usefulness of RADARSAT-1 image for geomorphological mapping 
                         and land-cover assessment, particularly in macrotidal mangrove 
                         coasts. It was possible to map mangroves, salt marshes, chenier 
                         sand ridges, dunes, barrier-beach ridges, shallow water 
                         morphologies and different forms of land-use. Furthermore, a new 
                         method to estimate shoreline changes based on the superimposition 
                         of vectors extracted from both sources of SAR data has indicated 
                         that the shoreline has been subjected to severe coastal erosion 
                         responsible for retreat of 32 km2 and accretion of 20 km2, 
                         resulting in a mangrove land loss of almost 12 km2. In an 
                         application perspective, orbital and airborne SAR data proved to 
                         be a fundamental source of information for both geomorphological 
                         mapping and monitoring coastal changes in moist tropical 
                         environments. RESUMO Imagens de radar de abertura sint{\'e}tica 
                         (SAR) vem sendo bem mais utilizadas do que antes nas 
                         aplica{\c{c}}{\~o}es de geoci{\^e}ncias em regi{\~o}es 
                         tropicais {\'u}midas. Nesta investiga{\c{c}}{\~a}o, uma imagem 
                         RADARSAT-1, na banda C, polariza{\c{c}}{\~a}o HH adquirida em 
                         1998 foi usada para o mapeamento costeiro e avalia{\c{c}}{\~a}o 
                         da cobertura da terra na {\'a}rea de Bragan{\c{c}}a, norte do 
                         Brasil. Imagem do radar aerotransportado GEMS-1000, na banda X, 
                         polariza{\c{c}}{\~a}o HH, adquirida em 1972 durante o projeto 
                         RADAM foi tamb{\'e}m utilizada para avaliar as 
                         varia{\c{c}}{\~o}es costeiras ocorridas nas {\'u}ltimas 
                         tr{\^e}s d{\'e}cadas. A pesquisa tem confirmado a utilidade da 
                         imagem RADARSAT-1 para o mapeamento geomorfol{\'o}gico e 
                         avalia{\c{c}}{\~a}o da cobertura da terra, particularmente em 
                         costas de manguezal de macromar{\'e}. Al{\'e}m disso, um novo 
                         m{\'e}todo para estimar as varia{\c{c}}{\~o}es da linha de 
                         costa baseado na superposi{\c{c}}{\~a}o de vetores 
                         extra{\'{\i}}dos de diferentes imagens SAR, com alta 
                         acur{\'a}cia geom{\'e}trica, tem mostrado que a 
                         plan{\'{\i}}cie costeira de Bragan{\c{c}}a tem estado sujeita a 
                         severa eros{\~a}o respons{\'a}vel pelo recuo de aproximadamente 
                         32 km2 e acre{\c{c}}{\~a}o de 20 km2, resultando em uma perda de 
                         {\'a}rea de manguezal de aproximadamente 12 km2. Como perspectiva 
                         de aplica{\c{c}}{\~a}o, dados SAR orbitais e aerotransportados 
                         provaram ser uma importante fonte de informa{\c{c}}{\~a}o tanto 
                         para o mapeamento geomorfol{\'o}gico, quando para o monitoramento 
                         de modifica{\c{c}}{\~o}es costeiras em ambientes tropicais 
                         {\'u}midos.",
           copyholder = "SID/SCD",
                  doi = "10.1590/S0001-37652003000300007",
                  url = "http://dx.doi.org/10.1590/S0001-37652003000300007",
                 issn = "0001-3765",
             language = "en",
        urlaccessdate = "21 maio 2024"
}