Analysis of the turbidity in the Curuaí floodplain (PA, Brazil) integrating telemetric data and MODIS/TERRA images / Análise da turbidez na planície de inundação de Curuaí (PA, Brasil) integrando dados telemétricos e imagens MODIS/TERRA

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The hypothesis that motivated the accomplishment of this research was: the turbidity has a variation in response of flood pulse in the Curuai floodplain and this response could be folloied with the use of satellite images and in-situ data (ground data and telemetric data). Thus, the objective of the work was evaluate the turbidity behavior in the Curuai floodplain during the hydrological cycle. The response of turbidity in the floodplain was studied in two scales: first, point-temporal (turbidity sampling by Environmental Monitoring System-SIMA); second, spatial-temporal analysis (turbidity distribution using MODIS/ TERRA images). As the two scales are distinct, the treatment methods had also been distinct. For treatment of the point-temporal scale, we used a non-linear method called Wavelet Transform. For spatial-temporal scale, we used five field campaigns with turbidity sampling. This ground data was treated with Ordinary Kriging. A Spectral Linear Mixture Model was applied in MODIS image during 2003 to 2005, to verify the turbidity distribution during the hydrological cycle. The main results were: [1] the annual flood pulse is the main driving force that modulates turbidity values in the Curuai floodplain; [2] the results derived from Spectral Linear Mixture Model showed that the north region of floodplain is more turbid than the south region; [3] it`s difficult to adjust a unique mathematical function for estimating the turbidity in floodplain. Thus, we conclude that the turbidity variability, both in two scales, it is a response to the flood pulse.

ASSUNTO(S)

remote sensing turbiry análise de ondeletas statistical analysis lakes modis análise estatística amazon region turbidez sensoriamento remoto limnology modis lagos região amazônica limnologia wavelet analysis

ACESSO AO ARTIGO

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