Aplicação de métodos hidroacústicos na classificação textual do fundo marinho
This work shows a bathymetric mapping and a textural mapping using side scan sonar and sediment data of a sector of the continental shelf adjacent to Ponta Negra beach and Barreira D’água beach located at Natal /RN. The Bathymetric data were collected with different methodologies to calculating t...
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| Natura: | Dissertação |
| Lingua: | por |
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Brasil
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| Accesso online: | https://repositorio.ufrn.br/jspui/handle/123456789/25297 |
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| Riassunto: | This work shows a bathymetric mapping and a textural mapping using side
scan sonar and sediment data of a sector of the continental shelf adjacent to Ponta
Negra beach and Barreira D’água beach located at Natal /RN. The Bathymetric data
were collected with different methodologies to calculating the depth: The direct wave
and the interferometry. A comparative between these data was performed and the
result showed different mean depth values. The interferometry methodology was
used to map the entire study area. This mapping showed that the depht varies from
3m to 13m along the study area. The interpretation of bathymatric data allowed
identify seafloor features such as: sand banks parallel to the shoreline, sand dunes
and the rocky cluster. The interpretation of sonography data allowed identify 6
differents patterns of backscatter. Moreover in some cases was possible to correlate
the seafloor features and the patterns of backscatter with the active hydrodynamic
standard. Furthermore was done a comparative study between the automatic textural
classification and the supervised textural classification using the backscatter data.
This comparison is based on the sediment data using the granulometry features. The
comparative show different results in the identification of backscatter’s patterns. The
automatic textural classification identified 4 patterns while the supervised textural
classification identified 6 patterns. The analysis of sediment data is in accordance
with the supervised classification as have been identified six size fractions of
sediment in the bottom samples. |
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