Banca de DEFESA: GABRIELA NUNES REBOUÇAS LEAL

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : GABRIELA NUNES REBOUÇAS LEAL
DATE: 31/07/2024
TIME: 08:30
LOCAL: https://meet.google.com/qrw-hkqb-ziu
TITLE:

Analysis of the coastal vulnerability index to erosion and flooding in the Porto Seguro region and surrounding areas.

KEY WORDS:

Ggeoprocessing; remote sensing; coastal environments; coastal management; southern Bahia.

PAGES: 60
BIG AREA: Outra
AREA: Ciências Ambientais
SUMMARY:

The coastal zone is a dynamic and complex environment where the transition and interaction between air, ocean, and land occur. Due to its strategic position, wide diversity of ecosystems, and economic potential, this region has been intensely occupied over the years. These factors lead to pressure on this environment, especially in a scenario of climate change, where the increase in frequency and intensity of extreme events makes this location more vulnerable to potential damage. In this sense, the general objective of the study was to determine the coastal vulnerability index (CVI) to erosion and flooding in a stretch of the coast of Porto Seguro and Santa Cruz Cabrália - BA. For this, a coastal line extension of about 25 km was selected, covering beaches from Santa Cruz Cabrália to Arraial D'Ajuda – Porto Seguro (BA). Eleven environmental and anthropogenic indicators were selected (i.e., terrain elevation, slope, beach morphodynamics, presence of river mouths, coastline variation, beach width variation, wave exposure, waves, occupation, vegetation, and beach orientation) and four scenarios, considering tidal conditions, cold fronts, and projections of the average sea level rise. Weights were calculated for each variable, and vulnerability was divided into low, moderate, and high. The results indicated that in a moderate scenario under quadrature tide/cold front conditions, the studied stretch had 22% low vulnerability, mainly in the southern sector, 53% with moderate vulnerability, and 25% high vulnerability. In an extreme scenario under syzygy tide/cold front conditions, 1% had low vulnerability, 18% of the coast was classified as having moderate vulnerability, and 81% with high vulnerability. Considering projections of average sea level rise, in a moderate scenario, the coast had 19% low vulnerability, 49% with moderate vulnerability, and 33% high vulnerability, while in an extreme scenario, 2% of the coast was classified as having moderate vulnerability, and 98% with high vulnerability. Coastal vulnerability is considered a complex topic that involves various sectors; thus, coastal management is a collective effort that requires the participation of governments, nongovernmental organizations, scientists, local communities, and the private sector. By facing this challenge head-on, it is possible to help coastal communities, preserve marine ecosystems, and promote a more sustainable future.

COMMITTEE MEMBERS:
Externa à Instituição - BREYLLA CAMPOS CARVALHO - USP
Externa à Instituição - CARLA ISOBEL ELIFF
Presidente - 2255983 - CATARINA DA ROCHA MARCOLIN