Banca de DEFESA: FRANKLIN ROBERTO DA COSTA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : FRANKLIN ROBERTO DA COSTA
DATA : 24/05/2018
HORA: 08:30
LOCAL: Sala de Reuniões, Centro de Biociências, UFRN
TÍTULO:

ANALYSIS OF THE ENVIRONMENTAL VULNERABILITY OF THE HYDROGRAPHIC BOWL OF THE RIO DOCE (RN)

PALAVRAS-CHAVES:

Environment; GIS; Environmental Diagnosis; Environmental Vulnerability

PÁGINAS: 236
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

The Rio Doce – BHRD basin is located in the eastern portion of the State of Rio Grande do Norte. Is a geographical unit that comes over time, showing a disorderly occupation process, in its most varied forms. The diversity of existing environmental systems make it an area potentially vulnerable to negative environmental impacts. In this context, this thesis aimed to identify and map the spatial and geo-environmental characteristics and natural and environmental vulnerabilities of the Rio Doce-RN basin, with operational and methodological support the Geotechnology of free software. As a result, proposed a new delimitation of the BHRD, in which there was an increase of 2.29% of the total area, your official passing of 387.8 km ² to 396.7 km ². Geoenvironmental characterization showed that the basin has suffered human actions which are changing the local landscape, turning areas, previously considered "preserved" in impacted areas, especially close to large urban centres and in the sources of the Mudo and Guajirú rivers. One of the most impressive activities include: seasonal farming, responsible for removal of natural vegetation, including riparian forests, to the cultivation of monocultures and vegetables in major and minor Guajirú and Mudo riverbeds; the production in areas of rural settlements, the Guajirú riverhead; the perennial cultivation of coconut, banana and cashew in riverbeds with perennial characteristics near the Extremoz Lagoon; urban sprawl toward the Mudo River, near the urban area of Ceará-Mirim, on the shores of the Extremoz Lagoon and Guajirú River, in addition to the towns and districts of Serrinha and Massaranduba and urban areas of Extremoz and Natal, and finally, the mining activity, in areas where touches on the Intrusive Suite Dona Inês geological formation. The result of these activities in the basin was reflected in natural and environmental vulnerabilities mappings. In natural vulnerability, the basin was classified as Medium stable/Vulnerable, equivalent to 2.1, level 4, with strong tendencies to become Moderately Vulnerable. This is the pressure in the urban areas located further east of the basin, sedimentary rocks of the Quaternary sediments and Formation, with a geomorphology, soils and vegetation changed by human action, but minimized the more regular rainfall distribution. To environmental vulnerability, the results showed that the basin ranks with a degree of vulnerability Moderately Vulnerable, with 2.4, 2 level value. In this case, the influence of human actions in the environment made these values reach 2.7 in urban areas, decreasing towards the West portion of the basin. It is concluded that the current stage of use and occupation of the basin is nearing the limit of sustainability. The results obtained in this thesis has shown a need for elaboration of proposals that aim to minimize the negative impacts generated by the exploitation of natural resources existing there, allowing achieving social and environmental sustainability of the basin by keeping the balance morphogenesis/pedogenesis, as demonstrated in the analysis of natural and environmental vulnerabilities.

MEMBROS DA BANCA:
Externo à Instituição - ALFREDO MARCELO GRIGIO - UERN
Externo à Instituição - EDUARDO RODRIGUES VIANA DE LIMA - UFPB
Externo ao Programa - 2190974 - JOANA DARC FREIRE DE MEDEIROS
Interno - 707.819.324-59 - JULIO ALEJANDRO NAVONI - UFRN
Externo ao Programa - 1249023 - SEBASTIAO MILTON PINHEIRO DA SILVA