Applications of quantitative analysis techniques to monitor water quality of Curuai Lake, Brazil

Author

Carvalho, J.C. ; Barbosa, C. ; Novo, E.M. ; Mantovani, J.E. ; Melack, J. ; Filho, W.P.

Author_Institution

Div. de Sensoriamento Remoto, Inst. Nacional de Pesquisas Espaciais, Sao Paulo, Brazil

Volume

4

fYear

2003

fDate

21-25 July 2003

Firstpage

2362

Abstract

In this paper we discuss the advantages and limitations of the Spectral Angle Mapper (SAM), Continuum-Removal methods (CR) and Derivative Analysis (DA), to study the optically active water components. These techniques were applied to 61 samples collected at Curuai Lake, located in the Amazonian floodplain, Brazil. The data are composed of limnological variables and in situ reflectance spectra. The SAM algorithm succeeded in matching samples displaying similar spectral behavior allowing them to be classified into clusters of similar water types. In addition, measurements of depth, position, width and asymmetry of absorption bands resulting from CR application seem to be a useful tool to investigate the role of the various optical components on the absorption features.

Keywords

atmospheric optics; atmospheric spectra; lakes; water; Amazonian floodplain; Brazil; Continuum Removal methods; Curuai lake; Derivative Analysis; Spectral Angle Mapper; absorption bands; optically active water components; quantitative analysis techniques; reflectance spectra; water quality monitoring; Absorption; Chromium; Lakes; Libraries; Optical attenuators; Optical devices; Optical sensors; Parameter estimation; Reflectivity; Remote monitoring;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 2003. IGARSS '03. Proceedings. 2003 IEEE International

Print_ISBN

0-7803-7929-2

Type

conf

DOI

10.1109/IGARSS.2003.1294442

Filename

1294442