Banca de QUALIFICAÇÃO: DÉBORA JOYCE DO NASCIMENTO ROCHA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : DÉBORA JOYCE DO NASCIMENTO ROCHA
DATE: 29/08/2024
TIME: 14:00
LOCAL: Sala 1 - Programa de Pós-Graduação em Geodinâmica e Geofísica/Dpt Geologia
TITLE:

SATELLITE-DERIVED BATHYMETRY APPLIED TO AN AREA ON THE NORTHERN SHELF OFF RIO GRANDE DO NORTE

KEY WORDS:

Bathymetry; Satellite Imagery; Continental Shelf

PAGES: 25
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Geologia
SPECIALTY: Sedimentologia
SUMMARY:

Continental shelves, covering about 7% of the ocean floor, vary in width and depth, extending from coastal areas to the edge of the continental slope. These shelves are crucial for coastal stability and the formation of marine habitats. Bathymetry, which maps the depth and relief of the seafloor, traditionally employs acoustic methods, but advances in remote sensing now enable the use of satellite imagery for these studies. This work focuses on investigating the morphology and sediment dynamics of the inner shelf in northern Rio Grande do Norte using satellite-derived bathymetric data. The study aims to explore the morphology and sediment dynamics of the inner continental shelf in an area north of Rio Grande do Norte, utilizing bathymetric data obtained from satellite imagery to enhance the understanding of submerged structures and the processes shaping the area. The study uses images from the Landsat 8 and 9 OLI - TIRS satellites, captured in March and June 2023. The images were processed using a methodology based on the ratio transformation algorithm applied to the blue and green bands, as proposed by Stumpf et al. (2003). ArcGIS 10.8 software was used for image processing, applying logarithms to the bands and performing logarithmic divisions to estimate depth. The results revealed patterns of grooves and clear features on the continental shelf, such as the Coroa das Lavadeiras. The division between the bands showed similar results, though some grooves became more pronounced than others. The consistency of R2 values across different divisions indicates the need for adjustments in methods for greater depths. Satellite-derived bathymetric data proved effective in mapping shallow waters, revealing important details about the morphology of the inner continental shelf. However, the methods require refinement to improve accuracy at depths greater than 40 meters. The research suggests the need for further studies in deeper areas and highlights the SDB technique as a promising tool, despite its limitations. The work contributes to better management and conservation of marine and coastal resources in the region.

COMMITTEE MEMBERS:
Externa ao Programa - 1226434 - MARY LUCIA DA SILVA NOGUEIRA - nullPresidente - 2042405 - MOAB PRAXEDES GOMES
Externo à Instituição - PAULO VICTOR DO NASCIMENTO ARAÚJO - IFRN