Name: TALES MIGUEL INACIO DA SILVA
Type: MSc dissertation
Publication date: 28/02/2023
Advisor:

Name	Role
ANDRE LUIZ NASCENTES COELHO	Advisor *

Examining board:

Name	Role
ANDRÉ LUÍS DEMUNER RAMOS	External Examiner *
ANDRE LUIZ NASCENTES COELHO	Advisor *
CARLO EUGENIO NOGUEIRA	Internal Alternate *
VINÍCIUS SANTOS LIMA	External Examiner *

Summary: Floods are hydrometeorological or hydrological events that affect drainage basins of different sizes and land uses. Thus, different researchers have undertaken efforts, through Geotechnologies and Remote Sensing applied to Geography, to better understand the dynamics of surface waters (rivers, lagoons and chanals), integrated to land uses in the northern region of the State of Rio de Janeiro. This dissertation aims, in a systemic way, to understand the flood processes from the natural variables (declivity and morphosculptures) and anthropic variables (land cover and use) within the scope of the drainage basin of Campelo lagoon-RJ, seeking to direct actions of territorial-environmental ordering and monitoring applied to reduce the risks caused by this phenomenon/event. The illustration of the analyzes and elaboration of the flood model were spatialized from vector and matrix data publicly available by organizations and institutions of research and environmental management, valued by mathematical algorithms and computed in the Raster Calculator function in the QGIS software version 3.12.3, in Desktop interface.This proposal was adapted from Ross (1994) and used byLima (2019) respectively applied to socio-environmental fragility and floodplain areas of the drainage basin of the Feialagoon-RJ. Each variable belonging to each class was assigned a value from 1 to 5, WHERE 1 (one) is very low the flood potential and 5(five) very high. The final product “Emerging Fragility to Flood Events in the Campelo System Drainage Basin” shows that 25% of the total area of the studied system is classified as having a very high flood potential (186.29 km2). Observing the variables of land use and land cover within this class: the water mirrors and floodable areas of the entire drainage basin of the Campelo system, (86%) and (70%) respectively, are spatialized within the very high fragility class emerging from floods. The sum of these two variables included in this class is (63.95 km2), referring to (34.32%) areas with very high vulnerability to flooding; the variables referring to economic production activities (agriculture and pasture) of the Campelo system, (20%) of both activitiesare spatialized within the class of very high fragility to flooding. The sum of these economic variables within this class corresponds to an area of (101.23 km2) and a percentage of (54.34%) of the entire area of very high flood fragility; as for the total urban area of the drainage basin, it presented a percentage of (5.63%) within the area of very high fragility to floods, impacting several points due to possible overflowand obstructions of access roads. The distribution of land use and land cover variables within the class of very high fragility to flooding demonstrates the relevance of measures for the protection and preservation of these spaces, such as reforestation of riparian forests in lagoons and channels to fix their banks, preventing the advance of floodwaters, water from the rains and upstream of the Paraíba do Sul river, the zoning of new habitationand economic developments and the planning of the local and regional drainage system. The results were validated by photographs taken in field activities and Google Street View images (web version) in the North Fluminense landscape. The research presented contributes to achieving the environmental objectives of the 2030 agenda of the United Nations (UN) in the“ensure availability and sustainable management of water and sanitation for all”and “Take urgent action to combat climate change and its impacts”.

KEYWORDS: Lagoon and Fluvial Geomorphology; Environmental Systems Modeling; Environmental Management.

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