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		<isbn>978-85-17-00088-1</isbn>
		<label>60179</label>
		<citationkey>RottaAlcWatRodIma:2017:AvDeVe</citationkey>
		<title>Avaliação do desenvolvimento da vegetação aquática submersa em reservatório por meio da profundidade do disco de Secchi estimada com imagem SPOT-6</title>
		<format>Internet</format>
		<year>2017</year>
		<secondarytype>PRE CN</secondarytype>
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		<author>Rotta, Luiz Henrique da Silva,</author>
		<author>Alcântara, Enner Herenio,</author>
		<author>Watanabe, Fernanda Sayuri Yoshino,</author>
		<author>Rodrigues, Thanan Walesza Pequeno,</author>
		<author>Imai, Nilton Nobuhiro,</author>
		<electronicmailaddress>luizhrotta@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>4787-4794</pages>
		<booktitle>Anais</booktitle>
		<organization>Instituto Nacional de Pesquisas Espaciais (INPE)</organization>
		<transferableflag>1</transferableflag>
		<abstract>The aquatic macrophytes are among the primary producers in artificial reservoirs and can be classified into four groups: rooted, floating, emergent and submerged. The radiation availability is the main limiting factor in the growth of submerged macrophytes (or submerged aquatic vegetation - SAV). The Secchi depth (SD) is a fundamental variable in limnological studies, and it is an indicator of water transparency. The water transparency is directly related to radiation availability; hence the SD is useful in SAV studies. Therefore, the goals of this study were to estimate the SD using SPOT-6 image and evaluate the development of SAV based on the SD estimated by remote sensing. The study area was a section of the Nova Avanhandava Reservoir, which belongs to the reservoirs cascade of the Tietê River - São Paulo, Brazil. The regression between the centered band at 660 nm and the SD resulted in a R² = 0.73 and a NRMSE = 21.5%. The SD map was made using the atmospherically corrected SPOT-6 image and the calibrated SD prediction model. Two regions with different SD (Class 0.0 - 1.0 m and Class > 5.0 m) were selected to evaluate the SAV height. Therefore, it was observed that under different SD conditions there is a change in both maximum height reached by the SAV and the depth of its occurrence.</abstract>
		<area>SRE</area>
		<type>Áreas úmidas e águas interiores</type>
		<language>pt</language>
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