Banca de DEFESA: LUIZ WAGNER NOVAIS HONORIO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LUIZ WAGNER NOVAIS HONORIO
DATE: 29/08/2022
TIME: 10:30
LOCAL: Plataforma Virtual Google Meet
TITLE:
KEY WORDS:

Rainfall variability, Pluviometry, Influence of the relief, Land use and land cover.

PAGES: 86
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Geografia Física
SPECIALTY: Hidrogeografia
SUMMARY:

This study focuses on the analysis and spatial and temporal characterization of the behavior of rainfall in the southern region of the state of Bahia, and its relationship with the physical elements present in the region, in the period between the years 1989 to 2018. Data from 18 rainfall stations scattered throughout the study area, made available through the HidroWeb portal of the National Water Agency (ANA) and data provided by the Climate Hazards Group InfraRed Precipitation with Station (CHIRPS) platform, were used. The rainfall stations were selected, among others, for better data collection. The relief data were obtained from the Shuttle Radar Topography Mission (SRTM) with images extracted from Earth Explorer of the United States Geological Survey (USGS). For land use and land cover, chronological data from the MapBiomas project were used, and for geomorphology the RadamBrasil. The satellite images were processed and finalized through the Qgis 3.22 software, using shapefiles from the cartographic base of the Brazilian Institute of Geography and Statistics (IBGE) from the year 2019. Interpolated maps of the surface stations were made, generating monthly and annual averages for the time frame analyzed. Among the results obtained during the research, the use of the CHIRPS tool proved to be valid, based on the comparison of the measured values with the values of the surface stations. In relation to the relief, the region is influenced by the orography in its rainfall regime, being more accentuated in the central portion, where it also has the lowest rainfall averages. As for the use and coverage of the land, the changes that have occurred in the last 30 years were observed, noting a decrease in agriculture and a great advance in the planting of eucalyptus in the region. As for the spatial distribution of rainfall in the region, high spatial variability was noted, with the presence of accentuated values to the north of the study area, with an average annual rainfall of 2034 mm, found at the Valença station. And lower average annual values, of 762 mm, in Itajú da Colônia. From one decade to another, a reduction in the average annual rainfall values of about 100 mm was observed. It was also found that the region does not have well-defined periods of rainfall during the year, with a homogeneous distribution for most of the stations, with emphasis on the month of November, the rainiest in all stations.

BANKING MEMBERS:
Presidente - 2029209 - ANDRE BATISTA DE NEGREIROS
Interna - 2172566 - CARLA JUSCELIA DE OLIVEIRA SOUZA
Externo à Instituição - RONALDO LIMA GOMES - UESC