Banca de QUALIFICAÇÃO: ROBERTO SÁVIO RODRIGUES BRASIL

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ROBERTO SÁVIO RODRIGUES BRASIL
DATE: 17/07/2024
TIME: 15:00
LOCAL: Plataforma do Google meet
TITLE:

RIVER GEOMORPHOLOGICAL DYNAMICS OF THE MADEIRA RIVER IN THE SECTION OF THE MUNICIPALITY OF MANICORÉ/AM AND ITS IMPLICATIONS ON URBAN RIVERSIDE AREAS

KEY WORDS:

Fluvial geomorphological dynamics. Madeira River. Remote sensing. Seasonality of flows. Erosion and sedimentation. Urban riverside areas

PAGES: 100
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Geografia Física
SPECIALTY: Hidrogeografia
SUMMARY:

This study investigates and identifies how geomorphological changes influence flood and drought cycles, riverbank erosion, and sediment transport, directly impacting riverside urban areas. In addition, the effects of anthropogenic factors such as deforestation, dam construction, mining, and urbanization, which also influence the river's fluvial dynamics, are considered. The general objective of the research is to analyze the fluvial geomorphological dynamics of the Madeira River in the stretch that runs through the municipality of Manicoré/AM, between the municipalities of Humaita and Novo Aripuanã, over the period from 1985 to 2023. To achieve this goal, the dissertation is structured around four specific objectives. First, the physical aspects of the region are characterized and mapped, including geology, geomorphology, and soils. Then, the morphological changes that occurred in the Madeira River bed in the stretch corresponding to Manicoré are identified and documented. The third objective involves the analysis of the river flow cycles and the characterization of precipitation in the region, integrating these data to understand seasonal fluctuations and their impacts. Finally, the configuration of riverside urban areas is investigated, emphasizing how river dynamics influence urban morphology and the life of local communities. The Madeira River, as one of the main tributaries of the Amazon River, plays a crucial role in the ecology of the Amazon region and in the life of riverside communities. This river, characterized as a whitewater river, is notable for its high sediment load and turbid waters, which originate in the Andean and pre-Andean elevations. The study uses remote sensing techniques to perform a multitemporal analysis that allows a detailed assessment of the changes in the river's fluvial morphology over almost four decades. According to Moraes (2002), remote sensing plays an essential role in the execution of natural resource surveillance. The landscape was studied through a morphological analysis, which seeks to understand it from its forms, elements and structures, considering aspects such as relief, hydrography, vegetation, buildings, among others. Bertrand (1972) considers the landscape as a category of analysis that results from the dynamic interaction of different elements. The theoreticalmethodological conception adopted for the development of this research is a geosystemic approach, which has as its natural and physical characteristics the description of the geological, geomorphological, climatological aspects, vegetation, hydrography, in addition to the social and economic characterization, supported by the methodologies of Bertrand (1972), Sotchava (1976) and Tricart (1977). The results achieved showed that the Madeira River underwent considerable changes in its bed and banks due to natural processes of sedimentation and erosion. The displacement of the river bed and the variation of the channel patterns were documented through detailed mapping. An analysis of the flow cycles will be made, highlighting seasonality, with periods of intense flooding during the rainy season. These floods have also been associated with increased sediment transport, which affects water quality and river morphology. Human activities such as increasing urbanization, dam construction, mining, and agricultural practices in the Madeira River basin have influenced river dynamics, intensifying problems such as bank erosion and altering the river’ s natural flow patterns. We seek to understand the changes in river dynamics that directly affect riverside communities, impacting their traditional economic activities such as fishing, transportation, and agriculture. The instability of the river banks, exacerbated by floods and erosion, has led to population displacements and the need for adaptations in urban planning and disaster management. The results of the study provide crucial information for territorial planning and natural resource management in the region. They highlight the need for adaptive strategies that consider the river dynamics of the Madeira River to minimize adverse impacts on populations and maximize the sustainable use of water resources.

COMMITTEE MEMBERS:
Presidente - 2313615 - MICHEL WATANABE
Interno - 3102827 - JOAO PAULO ASSIS GOBO
Externa à Instituição - TAMIRES CUNHA DE AGUIAR