6 documents found, page 1 of 1
Analysis of spectral separability for detecting burned areas using Landsat-8 OL...
Pacheco, Admilson da Penha; Silva Junior, Juarez António da; Ruiz-Armenteros, Antonio Miguel; Henriques, Renato F.; Santos, Ivaneide de OliveiraFire is one of the natural agents with the greatest impact on the terrestrial ecosystem and plays an important ecological role in a large part of the terrestrial surface. Remote sensing is an important technique applied in mapping and monitoring changes in forest landscapes affected by fires. This study presents a spectral separability analysis for the detection of burned areas using Landsat-8 OLI/TIRS images i...
Evaluation of the ability of SLSTR (Sentinel-3B) and MODIS (Terra) images to de...
da Silva Junior, Juarez Antonio; Pacheco, Admilson da Penha; Ruiz-Armenteros, Antonio Miguel; Henriques, Renato F.Forest fires are considered one of the major dangers and environmental issues across the world. In the Cerrado biome (Brazilian savannas), forest fires have several consequences, including increased temperature, decreased rainfall, genetic depletion of natural species, and increased risk of respiratory diseases. This study presents a methodology that uses data from the Sea and Land Surface Temperature Radiomete...
Assessment of k-Nearest Neighbor and Random Forest classifiers for mapping fore...
Pacheco, Admilson da Penha; Junior, Juarez Antonio da Silva; Ruiz-Armenteros, Antonio Miguel; Henriques, Renato F.Forest fires threaten the population’s health, biomass, and biodiversity, intensifying the desertification processes and causing temporary damage to conservation areas. Remote sensing has been used to detect, map, and monitor areas that are affected by forest fires due to the fact that the different areas burned by a fire have similar spectral characteristics. This study analyzes the performance of the k-Neares...
Technical and scientific aspects of dams in Brazil: a theoretical approach
Pacheco, Admilson da Penha; Henriques, Renato F.; Ribeiro, Paulo Marcelo VieiraThe safety of a dam is the result of a series of factors, including structural, geotechnical, hydraulic, operational and environmental aspects. In Brazil, Law No. 12.334 of September 2010 establishes the National Dam Safety Policy, which requires safety reports and monitoring inspections for existing dams. The inspection comprises a set of devices installed on the dam, which are used to assess the structural be...
TÉLÉDÉTECTION APPLIQUÉE À L’ÉTUDE DU BIOME CAATINGA: UNE REVUE DE LA LITTÉRATURE
Pacheco, Admilson da PenhaLe Nord-Est brésilien a à peu près 80% de sa superficie classée comme semi-aride avec environ 845.000 km² de Caatinga (l'équivalent à 11% du territoire du Brésil). Des études sur cet écosystème sont essentielles car ce biome est l'un des plus menacés en raison d’une utilisation inadéquate et non durable des ressources naturelles. Des travaux de recherches scientifique et technique en matière de Télédétection à ...
UMA ABORDAGEM GEOESPACIAL E ESPECTRO-TEMPORAL DA DEGRADAÇÃO AMBIENTAL NO BIOMA ...
FREIRE, Neison Cabral Ferreira; Pacheco, Admilson da PenhaA Caatinga é o tipo de vegetação que cobre a maior parte da área com clima semiárido da região Nordeste do Brasil. Estudos neste ecossistema são imprescindíveis, pois esse bioma é um dos mais ameaçados devido ao uso inadequado e insustentável dos recursos naturais. No Brasil, o semi-árido é uma das regiões mais afetadas pelo problema, ocasionando processos desertificatórios crescentes com graves consequências s...