Publicações

@article{Alcântara2016b,
title = {An investigation into the particle volume scattering function variability in a cascading reservoir system},
author = {Enner Herenio de Alcântara and Thanan Walesza Pequeno Rodrigues and Fernanda Sayuri Yoshino Watanabe and Nariane Marselhe Ribeiro Bernardo},
doi = {10.1007/s40808-016-0149-z},
issn = {2363-6211},
year = {2016},
date = {2016-06-08},
journal = {Modeling Earth Systems and Environment},
volume = {2},
number = {2},
pages = {89},
abstract = {This work analyzed the spectral and spatial distribution of the particle volume scattering function, βp, in a cascading reservoir system. During fieldworks water quality parameters and scattering data were sampled in a predetermined stations. The βp was estimated using the ECO-BB9 equipment that measures the volume scattering function, β at 117 [β(117)]. The estimated βp(117) were compared with the remote sensing reflectance, Rrs, and the chlorophyll-a (Chl-a) concentration, total suspended matter (TSM) concentration and the transparency (measured using a Secch disk). The results showed that in a hypertrophic environment the βp is dominated by the phytoplankton scattering and in an oligotrophic water system, the scattering by a suspended matter dominates. The βp(117) variability from a hypertrophic to an oligotrophic aquatic system affects the remote sensing reflectance (R rs) spectral shape. Due to this, the parametrization of a unique bio-optical model to estimate the optically active components in the water will be challenging.},
keywords = {cascading, particle, reservoir, volume scattering function, vsf},
pubstate = {published},
tppubtype = {article}
}

@article{RodriguesT2016,
title = {Spatial and temporal variations of the inherent optical properties in a tropical cascading reservoir system},
author = {Thanan Walesza Pequeno Rodrigues and Enner Herenio de Alcântara and Fernanda Sayuri Yoshino Watanabe and Nariane Marselhe Ribeiro Bernardo and Luiz Henrique da Silva Rotta and Nilton Nobuhiro Imai},
doi = {10.1007/s40808-016-0144-4},
issn = {2363-6211},
year = {2016},
date = {2016-06-07},
journal = {Modeling Earth Systems and Environment},
volume = {2},
number = {2},
pages = {86},
abstract = {In order to verify the effect of a cascade system in the water quality of two tropical reservoirs in Brazil, this work proposed to make use of the inherent optical properties (IOPs) as well as the specific inherent optical properties (SIOPs). From upstream to downstream, Barra Bonita (BB) is the first in a set of six reservoirs along Tietê River and Nova Avanhandava (Nav) is the fifth reservoir. BB is eutrophic whilst Nav is an oligotrophic environment. According to the IOP and SIOP analysis, it was possible to attest that BB was organic matter dominated and Nav was inorganic matter. These differences are noticeable in bio-optical modeling, must be considered different approaches to retrieve water quality parameters in both sites, once, the models take into account the specific information about the IOP and their relation with the optically active components (OACs) concentration. In addition, the results of this paper can provide comparable data to other water systems and improve the comprehension about the optical properties of complex water bodies.},
keywords = {cascading, inherent optical properties, reservoir, spatial, temporal, tropical},
pubstate = {published},
tppubtype = {article}
}

@article{Alcântara2016a,
title = {The variability of particle backscattering coefficient in an oligo-to-hypertrophic cascading reservoir system: implications to TSM bio-optical model development},
author = {Enner Herenio de Alcântara and Fernanda Sayuri Yoshino Watanabe and Nariane Marselhe Ribeiro Bernardo and Thanan Walesza Pequeno Rodrigues},
doi = {10.1007/s40808-016-0146-2},
issn = {2363-6211},
year = {2016},
date = {2016-06-06},
journal = {Modeling Earth Systems and Environment},
volume = {2},
number = {2},
pages = {84},
abstract = {The particle backscattering coefficient (b bp ) has been obtained either by equipment or semi-analytically based on relations between b bp and the remote sensing reflectance (R rs ). Correlation between b bp and R rs can be significantly high allowing the development of bio-optical model to estimate the total suspended matter concentration [TSM] on water surface from satellite images. The development of such model to monitor cascading reservoir systems can be challenging since this type of water resources changes their biogeochemical composition from upstream to downstream; the water in such system can range from hypertrophic to oligotrophic state. The scientific question raised in this letter is that: in an oligo-to-hypertrophic water system the models based on b bp will keep their good agreement or the influence of organic matter (e.g. chlorophyll-a) can affect this relationship? The aim of this letter was to analyze the b bp variability in a cascading reservoir system and search for empirical models that can capture the relationship between the b bp and [TSM]. The results showed that there are not only differences in the biogeochemical concentrations but also in the b bp from upstream to downstream. In addition there is an influence of chlorophyll-a concentration [Chl-a] on the relationship between b bp and [TSM] which prevents the bio-optical model development.},
keywords = {algorithm, backscattering, bio-optical, cascading, coefficient, hypertrophic, model, oligotrophic, particle, reservoir, total suspended matter, TSM},
pubstate = {published},
tppubtype = {article}
}

@article{rodrigues2016comparaccao,
title = {COMPARAÇÃO ENTRE MÉTODOS EMPÍRICOS PARA ESTIMATIVA DA CONCENTRAÇÃO DE CLOROFILA-A EM RESERVATÓRIOS EM CASCATA (RIO TIETÊ, SÃO PAULO)},
author = {Thanan Walesza Pequeno Rodrigues and Enner Herenio de Alcântara and Fernanda Sayuri Yoshino Watanabe and Luiz Henrique da Silva Rotta and Nilton Nobuhiro Imai and Marcelo Pedroso Curtarelli and Cláudio Clemente Faria Barbosa},
year = {2016},
date = {2016-01-01},
journal = {Revista Brasileira de Cartografia},
volume = {68},
number = {1},
keywords = {cascading, clorophyl, concentration, empíricos, reservoir, São Paulo, Tietê},
pubstate = {published},
tppubtype = {article}
}

@article{doi:10.1080/2150704X.2016.1145361,
title = {Field measurements of the backscattering coefficient in a cascading reservoir system: first results from Nova Avanhandava and Barra Bonita Reservoirs (São Paulo, Brazil)},
author = {Enner Herenio de Alcântara and Fernanda Sayuri Yoshino Watanabe and Thanan Walesza Pequeno Rodrigues and Nariane Marselhe Ribeiro Bernardo and Luiz Henrique da Silva Rotta and Alisson Fernando Coelho do Carmo and Marcelo Curtarelli and Nilton Nobuhiro Imai},
doi = {10.1080/2150704X.2016.1145361},
year = {2016},
date = {2016-01-01},
journal = {Remote Sensing Letters},
volume = {7},
number = {5},
pages = {417--426},
abstract = {ABSTRACTIn this study, a data set of total suspended matter (TSM), chlorophyll-a (Chl-a), total backscattering coefficient (bb) and the remote sensing reflectance (Rrs) were measured in the euphotic zone of two hydroelectric reservoirs at 71 stations during field surveys in the wet and dry seasons. These two reservoirs are located in a cascading system in Tietê River, São Paulo State, Brazil. The limnological and optical data were interpolated using the ordinary kriging technique to map their spatial distribution. The differences in TSM, Chl-a and in bb in space and time were investigated. The profiling data from bb were analysed. All these data were used to explain the resulting Rrs spectra in these two reservoirs. For both reservoirs, the inorganic fraction of TSM was responsible for the bb variability and therefore modulates the Rrs spectra. The seasonally difference in the optical data will help to understand how the inherent optical properties and the apparent optical properties changes in a cascading reservoir system.},
keywords = {backscattering, Barra Bonita, cascading, coefficient, field, nova avanhadava, São Paulo},
pubstate = {published},
tppubtype = {article}
}