Banca de DEFESA: ALINE SILVA DA COSTA LOPES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ALINE SILVA DA COSTA LOPES
DATE: 28/04/2021
TIME: 08:00
LOCAL: Videoconferencia - meet.google.com/sia-heep-cck
TITLE:

Application of interferometric sonar in the mapping of the inner shelf adjacent to Baia Formosa
- Rio Grande do Norte

KEY WORDS:

Bathymetry; Sonography; Interferometric Sonar

PAGES: 27
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUMMARY:

Continental shelves, correspond to the continuation of the shallow and submerged extension of the continent. They are highly dynamic systems, which have morphological features, which allow inference about hydrodynamic conditions, sedimentation processes and still contain records that reveal the sea level changes. The eastern continental shelf of the state of Rio Grande do Norte is still little explored when compared to the northern sector. This work aims to map an area of the inner continental shelf adjacent to the municipality of Baía Formosa, regarding the geomorphological and sediment distribution aspects. In this sense, hydroacoustic methods (interferometric bathymetry and sonography) were applied, associated to seabed sediment sampling for the acoustic signal calibration. The results indicate that the study area has an average depth of 12 meters, ranging from a minimum of 2.9 meters to a maximum of 21.7 meters; the depth increases offshore, at an average inclination of 0.24o. Bathymetric profiles cross to the coastline show that the shelf is smoother after 700 meters towards the coast. Additionally, the inner shelf in the northern portion is more pronounced than in the southern one. Lines of beachrocks and rocky outcrops were identified through the integration of bathymetric- and sonographic data. Based on acoustic backscatter patterns, recognized by the intensity contrast and textures, morphological features were identified and 6 reflection patterns were classified. These reflection patterns, associated with the type of material present on the seabed, allowed the sedimentological mappingn of the study area.

BANKING MEMBERS:
Presidente - 2218779 - HELENICE VITAL
Interno - 2042405 - MOAB PRAXEDES GOMES
Externa à Instituição - MARY LUCIA DA SILVA NOGUEIRA - UFES
Externa à Instituição - NARELLE MAIA DE ALMEIDA - IFRN