Banca de DEFESA: ANA CÉLIA FIDELIS DOS SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ANA CÉLIA FIDELIS DOS SANTOS
DATE: 20/10/2023
TIME: 14:00
LOCAL: Caicó – Geoceres
TITLE:
DYNAMICS OF EROSIVE PROCESSES IN THE HYDROGRAPHIC BASIN OF THE UPPER COURSE OF THE CURIMATAÚ RIVER, STATE OF PARAÍBA: AN ANALYSIS PERSPECTIVE FROM LAND USE AND OCCUPATION

KEY WORDS:
Erosion, Land use and land cover, Soil loss.

PAGES: 135
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Geografia Física
SPECIALTY: Geomorfologia
SUMMARY:
The dynamics of the processes operating in the semi-arid relief have erosion as an important
component. However, currently, this natural phenomenon has been drastically accelerated by human
action. Land use and coverage that evolves in a poorly planned way can generate high amounts of soil loss
and clogging of rivers and natural and artificial reservoirs. This research aims to analyze the dynamics of
erosion processes in the upper reaches of the Curimataú River basin, based on three attributes:
susceptibility to erosion, land use and cover and their impacts on accelerated erosion, and monitoring of
soil loss from of experimental stations. To prepare erosion susceptibility maps, the following variables
were used: erosivity, erodibility, geology, slope and land use and cover, using the map algebra technique
in the Qgis 3.14 software. To carry out land use and cover mapping, an image from the Sentinel 2-A
satellite was used, based on vectorization based on photointerpretation techniques. The experimental
stations for monitoring soil loss were based on the technique proposed by Baldassarani and Girão (2018),
which estimates soil loss from surface lowering, measured using erosion pins. The susceptibility maps
showed that the human activities established in the basin are causing the accelerated erosion process due
to human actions established in the natural environment. Land use and cover mapping identified that the
elements that most contribute to the intensification of erosion correspond to uncovered areas and
agriculture, as they promote the excessive removal of native vegetation. Finally, the soil loss observed in
the area was around one ton per hectare per year and tributaries of the basin and even the main river are
already suffering environmental imbalance resulting from the production of excess sediment, caused by
accelerated erosion. In view of this, it was possible to conclude that the inadequate use and management
of soil in the basin resulted in large extensions of uncovered areas resulting from deforestation, and that
consequently the accelerated erosion process acts intensely, causing soil loss and sediment production, as
well as causing erosion features present in the landscape.

COMMITTEE MEMBERS:
Externo à Instituição - ANTONIO JOSE TEIXEIRA GUERRA - UFRJ
Interno - ***.759.903-** - MARCELO MARTINS DE MOURA FÉ - URCA
Presidente - ***.935.314-** - SAULO ROBERTO DE OLIVEIRA VITAL - UFPB
Notícia cadastrada em: 20/09/2023 14:44
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