Banca de DEFESA: RAQUEL CARDOSO DE ARAUJO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RAQUEL CARDOSO DE ARAUJO
DATE: 11/12/2023
TIME: 14:00
LOCAL: ON-LINE
TITLE:
MAPPING AND DIAGNOSIS OF THE ENVIRONMENTAL VULNERABILITY OF SERRA DE SANTANA, SERIDÓ REGION, RIO GRANDE DO NORTE

KEY WORDS:
Environmental Vulnerability. Environmental Systems. Land Use/Cover. Serra de Santana.

PAGES: 160
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Geografia Física
SUMMARY:
The planning and management of the environment in this century are relevant issues for society. The
study of environmental vulnerability aims to indicate the potentialities and limitations of land use in the
face of human pressures on environmental systems and to contribute to understanding the spatial reality
in order to guide territorial management and planning. Historically, the Serra de Santana has had a
dynamic related to agricultural practices in its process of occupation. However, in recent years, with the
installation of wind farms, its spatial dynamics have undergone changes, particularly with the
advancement of urbanization and human impact on this humid enclave, leading to the degradation of
native vegetation and significant changes in land use/cover. This research aims to map and diagnose the
Environmental Vulnerability of Serra de Santana in the Seridó region of Rio Grande do Norte, based on
geosystemic landscape analysis and multicriteria analysis of physical-environmental variables. To achieve
this, the following maps of environmental and morphometric variables of the study area were generated:
Relief Dissection Index (RDI), Slope, Vegetation, Pedology, and Climate. Additionally, temporal mapping of
Land Use/Cover was conducted to analyze and quantify changes resulting from land use/cover, and
mapping of Landscape Environmental Systems was performed through integrated analysis of geographical
components to support the diagnosis of the subsystems mapped for Serra de Santana. The results of the
Land Use Mapping indicated significant spatial distribution changes over the years, particularly with the
increase in wind farms and degraded 'caatinga', consequently reducing dense vegetation. The temporal
land use maps support human influence on environmental systems, as the results of land use changes
indicate significant environmental degradation in these areas. Thus, seven predominant classes of
environmental systems were identified for the study area, among which Residual Crests and Abrupt
Escarpments, Dissected Eastern Slope, and Subhumid Western Slope systems showed moderate to high
levels of environmental vulnerability. In contrast, the environmental systems of Serrano Plateau, Eastern
Slope with weak Dissection, and Fluvial Plains and Alluvial Plateaus presented moderately stable to
moderate degrees of environmental vulnerability, representing transitional environments trending 
towards stability. The Environmental Vulnerability Mapping revealed five vulnerability classes for the
study area, predominantly Moderately Stable/Vulnerable, Moderately Vulnerable, and Vulnerable classes.
The Stable and Moderately Stable classes occurred more in plateau areas, on relief edges that are more
preserved regarding land use, situated on favorable lithologies and stable soils. However, the Vulnerable
class was classified in areas with steep relief and high relief dissection indexes, as well as in dominant
anthropic areas with higher rainfall amplitude indexes for the study area. The map of environmental
systems supports the environmental vulnerability of the territory, depicting classes with pronounced
ecodynamic fragility potential and systems showing conditions ranging from moderate stability to
moderate vulnerability. Therefore, it is expected that this research can contribute to understanding the
environmental dynamics of the landscape in this area of significant landscape/ecosystemic interest and
can guide the management and planning of these areas towards conservation and sustainable territorial
development.

COMMITTEE MEMBERS:
Presidente - ***.350.803-** - DANIEL DANTAS MOREIRA GOMES - UPE
Interno - 1112649 - JOSE YURE GOMES DOS SANTOS
Interno - ***.759.903-** - MARCELO MARTINS DE MOURA FÉ - URCA
Externo à Instituição - EMANUEL LINDEMBERG SILVA ALBUQUERQUE - UFPI
Notícia cadastrada em: 07/12/2023 22:50
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