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		<isbn>978-85-17-00088-1</isbn>
		<label>59706</label>
		<citationkey>SilvaJrSilv:2017:UsQABa</citationkey>
		<title>Uso de QA Bands do Landsat 5 na detecção de mudanças da linha de costa na Baía do Guajará, Belém-PA</title>
		<format>Internet</format>
		<year>2017</year>
		<secondarytype>PRE CN</secondarytype>
		<numberoffiles>1</numberoffiles>
		<size>1343 KiB</size>
		<author>Silva Junior, Antonio Gonçalves,</author>
		<author>Silva, Arnaldo de Queiroz da,</author>
		<electronicmailaddress>ajgoncalvesgeo@gmail.com</electronicmailaddress>
		<editor>Gherardi, Douglas Francisco Marcolino,</editor>
		<editor>Aragão, Luiz Eduardo Oliveira e Cruz de,</editor>
		<e-mailaddress>daniela.seki@inpe.br</e-mailaddress>
		<conferencename>Simpósio Brasileiro de Sensoriamento Remoto, 18 (SBSR)</conferencename>
		<conferencelocation>Santos</conferencelocation>
		<date>28-31 maio 2017</date>
		<publisher>Instituto Nacional de Pesquisas Espaciais (INPE)</publisher>
		<publisheraddress>São José dos Campos</publisheraddress>
		<pages>2860-2867</pages>
		<booktitle>Anais</booktitle>
		<organization>Instituto Nacional de Pesquisas Espaciais (INPE)</organization>
		<transferableflag>1</transferableflag>
		<abstract>Estuaries are one of the most important and dynamic ecosystems included in the coastal zones, presenting high environmental sensitivity. The dynamics of Guajará Bay, located in the Pará Rivers estuary at northern Brazil, was evaluated by multitemporal analysis compering Landsat images produced between 1984 and 2008. The multitemporal analysis revealed expressive changes of the bays morphology, mainly as a result of accretion and erosion of coastline zones triggered by hydrodynamics processes combined with anthropic actions. We used an alteration detection algorithm operated in the software PCI Geomatics 2012, using Land-water QA Band as input data. This data is part of Landsat Surface Reflectance High Level Data Products, made available by USGS in mid-2016. The processing results generated a trimodal raster that indicates accretion, erosion and non-alteration areas in the shoreline. Using the identified alteration pattern for the Guajará Bay, the comparative results indicated that the western margin was intensely eroded, with removal of 130 hectares of land whereas the eastern margin was accretioned with 87 hectares of sediments. The use of QA Bands revealed an operationally economical procedure that allows quick and gratuitous medium-scale geomorphological analysis of small-size estuarine settings, providing a better understanding of coastal zone dynamics during Holocene.</abstract>
		<area>SRE</area>
		<type>Análise de séries temporais de imagens de satélite</type>
		<language>pt</language>
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