Banca de QUALIFICAÇÃO: GABRIELA MATEUS DE FONTES SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : GABRIELA MATEUS DE FONTES SILVA
DATA : 17/07/2019
HORA: 14:00
LOCAL: CSC - Sede
TÍTULO:

Influence of land use and occupation on the water availability of the Buranhém river basin

PALAVRAS-CHAVES:

Geoprocessing, hydrological behavior, morphology, deforestation, statistical modeling.

PÁGINAS: 83
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

The land uses and occupations are directly or indirectly related to the main impacts that cause environmental degradation, deserving special attention the impacts in the watersheds. This work aimed to verify the influence of the alteration of the land use and occupation in the water availability of the Buranhém  river basin, located in the 4th Region of Planning and Management of the Waters of the state of Bahia. The work was divided in three stages: I. temporal analysis of the land use and occupation; II. Study of hydrological behavior; and  III. Joint analysis of hydrological data and land use and occupation by correlation. To delimit the study area a Hydrologically Consistent Digital Elevation Model (HCDEM) was made using raster images of the SRTM base. The hydrometeorological data were obtained from series of rainfall and fluviometric stations with influence area in the basin. These were imported into the National Water Agency's (ANA) website, and used to determine the average, minimum and maximum annual and mean annual discharge series and annual total rainfall series. Land use data from 1990, 2001, 2007 and 2013 were provided by the Forest Forum of the Extreme South of Bahia, and the annual land cover data from 1985 to 2017 were imported on the project platform MapBiomas. Deforestation in the region precedes the study period, since the first year the pasture was already the matrix of the landscape, mainly in the upper Buranhém region, between 1985 and 1991 the loss of native vegetation was significant, being replaced by pasture, which began to be replaced by the Eucalyptus monoculture and forest vegetation in the initial stage of regeneration after 2001. The results showed that the river is less regularized, with a strong influence of the annual precipitation, which variability possibly related to the El Niño phenomenon (ENSO). The correlation analyzes showed an inverse relationship between forest vegetation and Q50 and Q95 permanence flows, which means that vegetation growth decreases water availability due to increased evapotranspiration. The influence of the Ombrophylous Dense Forest, as well as the land uses, were not demonstrated due to the methodological limitations, on the other hand, the strong correlations between the flows and rainfall demonstrated the possibility to generate an empirical model of rain-flow transformation.

MEMBROS DA BANCA:
Presidente - 1649867 - FABRICIO BERTON ZANCHI
Interno - 1563747 - MARCOS EDUARDO CORDEIRO BERNARDES
Externo à Instituição - PAULINO PEREIRA OLIVEIRA - UEFS