Banca de QUALIFICAÇÃO: SAMARA FERNANDA DA SILVA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : SAMARA FERNANDA DA SILVA
DATE: 09/03/2022
LOCAL: Auditório Pós-Graduação em Engenharia Civil on line
TITLE:

Land Use And Precipitation in Streams of the Rio Grande-Ba Basin, Considering the Multiple Uses

KEY WORDS:

CHIRPS, Landscape Metrics, hydrological modeling, water resources planning and management modeling

PAGES: 80
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

The west of the State of Bahia, Brazil, one of the most active agricultural frontiers in the world, has been undergoing significant changes in land use and occupation and in rainfall patterns, with conflicts over natural resources (land and water) intensified since 2010. Climate change may alter the frequency, magnitude and intensity of rainfall in the region. At the same time, an increase in the areas of irrigated agriculture in the region has been observed, which promotes an increase in the volumes of water granted. These factors favor a possible compromise of water availability, which may intensify conflicts over water use. Thus, the purpose of the present work is to evaluate the effects and impacts of changes in land use and precipitation, and the demands of multiple users on the components of the water balance in the Rio Grande basin, Bahia, mainly in the flow regime. For this, it was first necessary to understand the behavior of two of the main inputs of the water balance: precipitation and land use and occupation. Thus, the rainfall estimated by the CHIRPS product and the spatial and temporal changes in land use and occupation in the basin were evaluated. After that, the effects (individual and overlapping) of land use/cover and precipitation will be evaluated, at different spatial (sub-basins and basins) and temporal (monthly and annual) scales, on the water balance components, mainly in the flow regime. Finally, the effects of land use/cover and precipitation will be evaluated, considering the flows required by multiple users, in the flows from the Rio Grande to the São Francisco River. Preliminary results showed that the CHIRPS precipitation estimates provided good responses in relation to the data observed in conventional surface meteorological stations, providing accurate information in the detection of rain, with excellent ability to represent the spatio-temporal variation of precipitation. A significant reduction in areas of natural vegetation was also observed, especially in forest and grassland formations, in addition to an increase in areas of human activities, especially rainfed agriculture and, more recently, irrigated agriculture.

BANKING MEMBERS:
Externo à Instituição - VINÍCIUS DE AMORIM SILVA
Interno - 1688881 - ALFREDO RIBEIRO NETO
Externa ao Programa - 1510820 - JOSICLEDA DOMICIANO GALVINCIO
Presidente - 1133540 - SUZANA MARIA GICO LIMA MONTENEGRO