Banca de DEFESA: MARIA RENATA MARIANO DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARIA RENATA MARIANO DA SILVA
DATE: 29/06/2022
TIME: 09:00
LOCAL: CAMPUS ARAPIRACA - ON LINE
TITLE:

IDENTIFICATION OF CAATINGA DEGRADED AREAS IN THE CAPIÁ RIVER HYDROGRAPHIC BASIN, SEMIARIDO OF BRAZIL.

KEY WORDS:

Degraded areas, Hydrographic basins, Caatinga, Vegetation indices, Remote sensing.

PAGES: 80
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Conservação da Natureza
SPECIALTY: Conservação de Bacias Hidrográficas
SUMMARY:

The Caatinga biome is the main set of terrestrial ecosystems in the Brazilian Northeast region. The Caatinga vegetation domain is diversified in landscapes and vegetation types; however, it is advancing in a stage of degradation with few conserved remnants. To understand the dynamics of such a diverse environment, it is important to consider watersheds as units. In this way, we sought to identify degraded areas in the Capiá River Basin, during the period from 2001 to 2021, inserted in the Caatinga Biome, Brazilian semi-arid region. For this, remote sensing products were used, where, through SRTM, LANDSAT 5/TM and 8/OLI images , data from MapBiomas Brazil and CHIRPS ; used in Google Earth Engine and Quantum gis ( Qgis ) allowed to evaluate the slope, Vegetation Indexes - IVs , land use and cover and precipitation. In addition, 10 targets were selected on the ground of the watershed, where data collection was carried out in the field. The study showed that most of the region has very low and low slopes (0-3% and 3-6%); the IVs used showed similar results with greater expression of vegetation cover for the last years of the time series, the spatial variation of vegetation is mainly related to slope and precipitation. With regard to land use and occupation, for the last decade, reductions were registered in the area (%) of the class’s natural forest, non-forest formation and water bodies, in contrast, an increase in agriculture and livestock and urban areas. The on-site visit represented a fundamental step for verifying the remote data, with images of each point being recorded. The data show that environmental monitoring studies are necessary to understand the dynamics of changes over time, the use of remote sensing offers many options as study tools, however, when validated in the field, they provide greater integrity.

BANKING MEMBERS:
Presidente - 1181648 - JOSE VIEIRA SILVA
Interna - 2187545 - FLAVIA DE BARROS PRADO MOURA
Externo à Instituição - PEDRO LUCAS COSMO DE BRITO