Name: JAMES RAFAEL ULISSES DOS SANTOS
Type: PhD thesis
Publication date: 15/07/2022
Advisor:
Name |
Role |
|---|---|
| JACQUELINE ALBINO | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| ANDRE LUIZ NASCENTES COELHO | Internal Examiner * |
| CARLOS ALBERTO KUSTER PINHEIRO | External Examiner * |
| GISELI MODOLO VIEIRA MACHADO | Internal Examiner * |
| JACQUELINE ALBINO | Advisor * |
| WESLEY DE SOUZA CAMPOS CORREA | External Examiner * |
Summary: Deltaic systems undergo constant changes as they are a dynamic environment that
is at the interface between river and coastal processes. In this way, climate changes
alter the levels and conditions of rainfall and river as well as oceanographic variables,
which have been considered in a secondary way in mapping floods in coastal regions,
mainly for deltas. The objective of this work is to study the vulnerability to flooding of
the deltaic plain of the river Doce, Espírito Santo-Brazil, considering that its evolution
took place in conditions of higher sea level than the current one, with the oceanic
fringe, potentially capable of serving barrier to recent changes in the intensification of
oceanographic events. The methodological procedures were based on bibliographic
and documentary research, cartographic data acquisition, survey of area
characteristics and desk work with the elaboration of thematic cartographic products
from multi-criteria methods (Boolean logic and Hierarchical Analytical Process-AHP),
using of map algebra in a Geographic Information Systems-GIS environment. The
results verified the changes that occur in terms of physical and socioeconomic
aspects (land use and cover) over the years in the deltaic plain landscape. Therefore,
with the integrated modeling of the variables: slope, geology, soils, geomorphology
and land use and cover, it is possible to determine the vulnerability to flooding, WHERE
it was verified through the models, that the area presented a predominance for the
classes high and very high, being validated by the extent of the flood pulses identified
in the Landsat-5 and 8 satellite images. The most vulnerable classes correspond to
the flat and smooth wavy relief sectors, which comprise the deltaic sub-environments,
fluviolagunar and fluviomarine plains, which, due to their morphological configuration,
have a natural susceptibility to flooding events, especially when the river´s main
channel overflows. Sweet, due to extreme floods. Vulnerability with lower classes, on
the other hand, was verified in the central sector, which is higher than the
surroundings and covers the inter-distributary plain sub-environment. In addition, an
analysis was carried out of the socio-environmental impacts occurring in the medium-
low river Doce on the construction of dams and the Mariana disaster (MG), WHERE
changes in the fluvial and socio-spatial morphological dynamics occurred in the
riverside communities along the river were observed. and in the deltaic plain. In short,
the methodology adopted showed satisfactory results when comparing the models
with other products, such as satellite images. Therefore, this work can contribute to
planning, management, ordering and decision making.
Keywords: Hydrometeorological Events; Deltaic environment; Multicriteria Analysis;
Social and Environmental Impacts.
