Banca de DEFESA: Beatriz Mapa Clemente

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Beatriz Mapa Clemente
DATE: 18/12/2023
TIME: 09:00
LOCAL: Vídeoconferência
TITLE:

"APPLICABILITY AND RELIABILITY OF DISPLACEMENT MONITORING IN A MINING DAM USING THE INSAR TECHNIQUE"

KEY WORDS:

Geotechnical Monitoring; Surface Displacement; InSAR; Dam; Instrumentation; ENC/FT/UnB

PAGES: 87
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Geotécnica
SUMMARY:

InSAR (Synthetic Aperture Radar Interferometry) has gained great visibility for dam monitoring purposes in the recent years, especially after the failure episodes of Fundão Dam in Mariana and B1 Dam in Brumadinho, in 2015 and 2019, respectively. The ability to monitor large areas at low cost, without the need to install any equipment in the field, has led to countless geotechnical structures being monitored by orbital radar to detect slow displacements, which can be precursors of instability and anomalies. The technique has also shown efficiency in indicate regions for the installation of complementary monitoring such as prisms and terrestrial radars, in addition to acting as a redundancy of displacement monitoring.
Like any other technologies, InSAR also has limitations that need to be known for a better understanding of its results, such as the satellite line of sight and revisit time, the structure geometry, vegetation and existence of water or humidity. As it is a recently applied technique in dam monitoring, the national bibliography is still small, which leads to a small amount of knowledge about this monitoring and doubts related to the applicability and reliability of the delivered data.
In this way, this research presents the deliverability of the InSAR technique, in the sense of applicability in displacements detecting that can be precursors of different failure modes and in anomalies monitoring, considering the Brazilian rules, the possible anomalous behavior and the main dam failures. Based on the results, InSAR monitoring was classified as a desirable, complementary, or not applicable monitoring for the identification of several geotechnical structure anomalies or places where anomalies could be developed.
The research also presents an analysis of the functionality and technical reliability of the InSAR data for a mining dam case study. Comparative analyzes were conducted considering the monitoring data obtained from InSAR (COSMO-SkyMed constellation) and another traditional displacement monitoring technology, a Robotic Total Station. Due to the low difference between monitoring results using both techniques, the case study presented good reliability and contributed to increase the understanding about monitoring mining dams with InSAR.

COMMITTEE MEMBERS:
Interno - 1805002 - ANDRE LUIS BRASIL CAVALCANTE
Interno - 404827 - ANDRE PACHECO DE ASSIS
Externa à Instituição - Karla Cristina Araújo Pimentel - VALE
Presidente - 404575 - NEWTON MOREIRA DE SOUZA