Banca de DEFESA: ELIEZER MAZZETTI ROSA
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.DISCENTE : ELIEZER MAZZETTI ROSA
DATA : 22/03/2018
HORA: 14:00
LOCAL: Auditório do Departamento de Geografia
TÍTULO:
RIO GRAMACIÓ/RN SUB-BASIN: IMPLICATIONS OF LAND USE AND COVERAGE ON NATURAL RESOURCES
PALAVRAS-CHAVES:
Hydrographic Basin, Land Use and Coverage, Water Quality, Gramació River.
PÁGINAS: 226
GRANDE ÁREA: Ciências Humanas
ÁREA: Geografia
RESUMO:
The adoption of the river basin as a management unit is in the appropriation of the system concept,since any change — whether natural or anthropic — can affect the elements that form the system.In this aspect, supported by the National Water Resources Policy in Brazil, the planning inhydrographic basins is necessary for the analysis of the evolution of the productive activities andthe modifications of the soil-occupation patterns. Under this bias, the present work analyses theGramació river sub-basin for understanding and discussing the processes arising from the use andcoverage of the land over the natural resources of the sub-basin. The studied area comprises34.32 km2 covering the municipalities of Vila Flor and Canguaretama — both located in themicroregion of the southern seaboard of the Brazilian state of Rio Grande do Norte — which maineconomic activity is the sugar cane monoculture. In this scenario, the present study identifies andanalyzes the implications on natural resources, specifically on water quality and forest coverage,as a result of land usage and land covering. For this, the methodology of this study involvedempirical and theoretical approaches. The first one was guided by the following themes: (I) landuse and coverage through class mapping, according to the Land Use Classification System (by theBrazilian Statistic and Geography Institute, IBGE), identifying 8 subclasses through the aerial andorbital images made in 2006 and 2011, allowing a quantitative and qualitative temporal analysis ofthe subclasses evolution; (II) morphometric analysis of the sub-basin that made it possible tounderstand the spatial arrangement of the drainage system and; (III) measurements of waterquality from both surface and groundwater sources measured by physical-chemical andmicrobiological laboratory tests, confronting the results with the standards established by thecurrent legislation. From the theoretical point of view, the hydrographic basin emerges as the maintheme of the research, bringing its concepts, the methodology for its delimitation and theconcerning legal aspects. Thus, concerning land usage and land covering, the results showed arealosses and area gains among the subclasses, highlighting the temporary crops as the mostexpressive. Parallel to this, the change in the criteria for the delimitation of Permanent PreservationAreas (PPAs) regulated by the New Brazilian Forest Code showed a regression in the issue ofprotecting surface water bodies. Regarding water quality, Gramació River’s samples showedseasonal and local variation due to the introduction of substances into the aquatic environment,through the discharge of domestic effluents and the contribution of leachated sediments from thesoil in the area. Regarding groundwater, variations in quality are due to infiltrations of domesticsewage through the septic and “black" cesspools located at the urbanized area in the Gramacióriver sub-basin — Vila Flor city, which lacks a sewage system. The results contributed to theelaboration of a cartography that spatializes the current state of surface water and groundwaterquality, as well as land usage and land covering patterns and their implications over the vegetation covers.
MEMBROS DA BANCA:
Presidente - 1803535 - ADRIANO LIMA TROLEIS
Externo à Instituição - JACIMÁRIA FONSECA DE MEDEIROS - UERN
Interno - 2321176 - JULIANA FELIPE FARIAS