Atualização de Documento

XIX SBSR

Formulário de atualização

O sistema de atualização, para eventuais correções, estará ativo até 30/11/2019.

Contato: bibdigital@inpe.br


Nome do Campo		Valor do Campo
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	Não esqueça de clicar na opção "+" para informar os dados dos co-autores, se tiver.		v
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Resumo	(*)(?)	Constructing large reservoirs by river impoundment leads to several changes in aquatic environment, which include changes in water constituents concentration such as Total Suspended Solids [TSS] and Chlorophyll-a [Chl-a]. Those changes, hence, affect water optical properties such as backscattering (bb) and absorption (a) coefficient. Therefore, this study aims to evaluate the relationship between inherent optical properties (bb, a and bb/a) and optically active components in a Brazilian reservoir and thus develop empirical models to assess [TSS] and [Chl-a]. In order to do so, ten sampling stations were profiled using an AC-S attenuation and absorption meter and a Hydroscat-6 backscattering meter from June 28th to 30th 2013 in Nova Avanhandava Reservoir, located in western São Paulo state. Simultaneously, water samples were collected for laboratory analysis to set chlorophyll-a and total suspended solids concentrations. [TSS] was strongly correlated with a, bb and bb/a in all wavelengths, with correlation coefficient ranging from 0.735 to 0.920. [Chl-a] presented a significant correlation coefficient (greater than 0.6) only with bb/a. Several different wavelengths were attempted for determining ratios between bb/a. The best model for [TSS] was achieved using [bb/a (590)] / [bb/a (442)] ratio, which provided R² = 0.855 and RMSE = 0.158 mg L-1. The regression between [Chl-a] and [bb/a (510)] / [bb/a (470)] ratio provided the best fit for chlorophyll-a, with R² = 0.472 and RMSE = 3.394 μg L-1.
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