Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DATA : 31/07/2019
HORA: 10:00
LOCAL: Auditório do CTEC

Coastal evolution of sandy beaches on the eastern coast of Rio

Grande do Norte, Northeast Brazil


Coastal evolution, Coastal management, DSAS, SMC

GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil

Coastal zones are studied by several areas of science, either
because of their socioeconomic importance in the emergence and
development of society, or because of the environmental importance of
these fragile transitional environments located between continental and
marine domains. Currently, demographic growth and the occupation
rising of these areas has been the object of higher attention worldwide
due to the severity of the damages caused by the rapid changes resulting
from the interaction of waves, tides and currents with the coastal
morphology. Allied to the lack of planning in the occupation of these
areas, there is still a great gap in the studies carried out on the processes
and variables inserted in this environment, which exposes to danger the
balance between the development of social and economic value activities

and the preservation of the unique ecosystems developed in these
regions. The study of the coastal zone is based on the observation and
analysis of the seasonal changes of these areas that, due to their high
environmental sensitivity, are subject to modifications that are often
irreversible. In this context, the State of Rio Grande do Norte includes
tourist cities equipped with dense coastal infrastructure that over the
years presents more and more problems related to the coastal dynamics,
especially regarding to erosion of sandy beaches. In this context, the
present study aimed to analyze the evolution of Jacumã and Muriú
beaches, eastern coast of Rio Grande do Norte, using the Digital
Shoreline Analysis System (DSAS) and the Coastal Modeling System
(SMC). The use of these tools allowed the analysis of the variation,
amplitude and mobility of the shoreline between 1984 and 2014 and the
characterization of the bathymetry, wave climate, currents and sediment
transport during the 60 years (1948 - 2008). Finally, information from
the DSAS and SMC were integrated, providing the volumetric variation
between 1984 and 2014.The analysis allowed the identification of
deposition episodes (mean of +0.7 m / year) from 1994 to 2004 and
erosion episodes from 1984 to 1994 (mean of -0.9 m / year) and from
2004 to 2014 (mean of -0.5 m / year). In addition, it was possible to
determine the hydrodynamic characteristics (predominance of east-
southeast direction waves and southeast direction currents), as well as
morphological characteristics (sediment transport rate of 54,000 m³ / year
(SMC) and 64,000 m³ / year (DSAS-SMC)). The study of Jacumã and
Muriú beaches allowed to construct a greater understanding of the
processes involved in the coastal evolution of these beaches. In addition,
it allowed the visualization of the active dynamics and the identification
of the sectors of greater sensitivity and susceptibility to changes, thus
providing relevant information to the management and maintenance and
preservation of the area under study

Presidente - 1222082 - ADA CRISTINA SCUDELARI
Externo à Instituição - CLAUDIO FREITAS NEVES - UFRJ
Externo ao Programa - 1882375 - MICHAEL VANDESTEEN SILVA SOUTO
Notícia cadastrada em: 12/07/2019 10:56
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