Banca de DEFESA: EDUARDO BARCELOS BONTEMPO FILHO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : EDUARDO BARCELOS BONTEMPO FILHO
DATE: 14/02/2023
TIME: 14:00
LOCAL: Programa de Pós-Graduação em Engenharia Civil
TITLE:

Temporal Analysis of Oil Contamination Related to Coastal Geodiversity in the Municipality of Cabo de Santo Agostinho – PE

KEY WORDS:

Oil spill, environmental disaster, tropical coastal environments, beach sediments, State of Pernambuco, slopes, digital models

PAGES: 131
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

During the months of August to November 2019, the coastal region of Northeast Brazil was the scene of what is already classified as the biggest environmental disaster on the Brazilian coast, impacting coastal ecosystems in 11 states and a diversity of ecosystems related to different geological configurations such as sandy beaches, rocky shores, estuaries, tidal flats, mangroves and reef systems. In this research, a temporal analysis of the occurrence of remaining contamination was carried out on three beaches (Paiva, Itapuama and Enseada dos Corais) in the Municipality of Cabo de Santo Agostinho, State of Pernambuco. The main objective is to investigate the relationship between the remaining contamination in different geological configurations: sediments and rock surfaces. In this way, a temporal model of the effect of oil contamination in relation to the types of geological substrate existing in the region was constructed. Comparing the results of this unprecedented event in a tropical region will allow for a better prediction of future problems of the same nature. The approach focused on the systematic mapping of residues, collection of sediment samples through trenches, photographic documentation and qualitative microscopic analysis. The analysis of granulometry, calcium carbonate and total organic matter provided a characterization of current deposition systems. Images were also collected by drone of a rocky shore to monitor the contamination. The environments studied comprise sandy beaches, rocky shores, hard surfaces such as corals and beach sandstones (beachrocks). An evaluation of the effect of contamination on surfaces formed by geological formations was also carried out, considering the presence of structures such as natural fractures, joints and dissolution cavities produced in hard substrates. This research also allowed the elaboration of a schematic model of the evolution of the contamination generated by the monitoring work that summarizes the destination of the oil residues in the three beaches studied in different temporal stages. Thus, the research prove that a large part of the contaminant was removed by the immediate action carried out by volunteers and by government agents and by the highly dynamic process that controls erosion and seasonal deposition in the studied sandy beach profiles. It was possible to qualitatively identify the level of persistence of the contaminant in relation to the morphology and composition of the impacted substrates. The observed effects were compared with other disasters and allowed establishing a framework of knowledge that will be important for the mitigation and monitoring of eventual disasters due to contamination of oil or derivatives.

COMMITTEE MEMBERS:
Presidente - 2130650 - JOSE FERNANDO THOME JUCA
Externa ao Programa - 1175854 - TEREZA CRISTINA MEDEIROS DE ARAUJO - UFPEExterno à Instituição - VAGNER ROBERTO ELIS - USP
Externa à Instituição - HELENICE VITAL - UFRN
Externo à Instituição - HERALDO LUIZ GIACHETI - UNESP