A5015999002- Geography and Environmental Studies
- Hydrology and Watershed Management Studies
- Soil Moisture and Remote Sensing
- Remote Sensing in Agriculture
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Soil erosion and sediment transport
- Soil Geostatistics and Mapping
- Flood Risk Assessment and Management
- Geochemistry and Geologic Mapping
- Ecology and Vegetation Dynamics Studies
- Remote-Sensing Image Classification
- Precipitation Measurement and Analysis
- Remote Sensing and LiDAR Applications
- Landslides and related hazards
- Fish biology, ecology, and behavior
- Plant Water Relations and Carbon Dynamics
- Remote Sensing and Land Use
- Land Use and Ecosystem Services
- Cryospheric studies and observations
- Spectroscopy and Chemometric Analyses
- Meteorological Phenomena and Simulations
- Climate variability and models
- Water Quality and Pollution Assessment
- Groundwater and Watershed Analysis
- Conservation, Biodiversity, and Resource Management
National Institute for Space Research
2015-2024
Instituto Nacional de Estudos e Pesquisa
1999
Instituto Nacional de Pesca y Acuacultura
1999
Background: Plant composition changes with topography and edaphic gradients that correlate soil-water nutrient availability. Data on soil water for the Amazon Basin are scarce, limiting possibility of distinguishing between influences plant composition. Aim: We tested a new proxy table depth, terrain height above nearest drainage (HAND), as predictor in trees, lianas, palms, shrubs, herbs compared HAND to conventional measures sea level (HASL) horizontal distances from (HDND). Methods:...
This article discusses seasonal and interannual variations of the evapotranspiration (ET) rates in Bananal Island floodplain, Brazil. Measurements included ET sensible heat flux using eddy covariance method, atmospheric forcings (net radiation, Rn, vapor pressure deficit, VPD, wind speed air temperature), soil moisture profiles, groundwater level flood height, taken from November 2003 to December 2006. For hydrological years (October‐September) 2003/2004, 2004/2005 2005/2006, accumulated...
Most previous studies of landslide susceptibility mapping (LSM) have not contemplated spatial heterogeneity and the commonly used models for LSM are aspatial, which could reduce model performance. Therefore, aiming to evaluate applicability algorithms predict susceptibility, performance geographical random forest (GRF) was evaluated, in comparison (RF) extreme gradient boosting (XGBoost). Based on results, GRF presented better (AUC = 0.876), followed by RF 0.748) XGBoost 0.745). also...
A vegetação secundária tem funções relevantes para os ecossistemas, tais como a fixação de carbono atmosférico, manutenção da biodiversidade, o estabelecimento conectividade entre remanescentes florestais, dos regime hidrológico e recuperação fertilidade do solo. O objetivo deste trabalho é, através uma abordagem amostral, estimar área ocupada por na Amazônia Legal Brasileira (AML) em 2006. amostragem se baseia estratificada pelo grau desflorestamento das cenas LANDSAT-TM que recobrem AML....
Abstract Amazonian forests harbor a large variety of understory herbs adapted to areas with different hydrological conditions, ranging from well‐drained seasonally flooded forests. The presence versus absence flooding forms the extremes gradient, various intermediate such as seasonal soil waterlogged areas, in between. We investigated relationship between and conditions Central using eighty‐eight 250 × 2 m plots distributed along 600‐km transect. Hydrological were determined regionally by...
Understanding hydrological extremes and the factors that condition them is crucial to promoting adaptability of urban watersheds. Furthermore, few studies investigate the spatial variability these their explanatory power. This study analyzed the Tamanduateí River Basin, located in São Paulo, Brazil, using data from multiple sources to explore relationships between inundation points occurrence and geo-environmental factors....
Remote sensing allows for the continuous and repetitive measurement of rainfall values. Satellite products such as Tropical Rainfall Measurement Mission (TRMM) 3B42 Hydroestimator (Hydroe) can be potential sources data hydrologic applications, mainly in areas with irregular sparse spatial distributions traditional rain gauge stations. However, accuracy these satellite over different temporal scales is unknown. In this study, we examined TRMM Hydroe to provide reliable estimates a mountainous...
The main objective of this study was to evaluate the monthly mean areal rainfall estimated using Tropical Rainfall Measuring Mission (TRMM) 3B43 version 7 product over an inland area in Central Brazil. Furthermore, we investigated effect TRMM orbit boost (in August 2001) estimates. estimates were compared reference data, collected at 67 rain gauge stations irregularly distributed area. results showed a good agreement between estimations and data (r>0.97). error analysis that tends...
MODerate resolution Imaging Spectroradiometer (MODIS) data are largely used in multitemporal analysis of various Earth-related phenomena, such as vegetation phenology, land use/land cover change, deforestation monitoring, and time series analysis. In general, the MODIS products to undertake composite mosaics best pixels over a certain period time. However, it is common find bad composition that affect We present filtering methodology considers pixel position (location space) (position...
Abstract. We investigated the influence of wintertime cold front activity on physical processes within a large tropical reservoir located in Brazil. The period chosen for this study consisted 49 days between 28 April 2010 and 15 July 2010. This was defined based information from Brazilian Center Weather Forecasting Climate Studies (CPTEC), data collected situ interpretation remotely sensed images. To better understand governing that drive changes heat balance, differential cooling mixing...
A problem that is frequently arising in the spectral mixture analysis how to correctly identify endmembers present scene. In of image data covering natural scenes, vegetation, bare soil, and shade/water are commonly assumed as endmembers, but other may also be present. This paper investigates an approach based on residuals produced by linear mixing model for identifying potential missing endmembers. The basic proposition consists assuming larger caused segmented terms residuals,...
This work proposes a trophic state index based on the remote sensing retrieval of chlorophyll-α concentration. For that, in situ Bidirectional Reflectance Factor (BRF) data acquired Ibitinga reservoir were resampled to match Landsat/TM spectral simulated bands (TM_sim bands) and used run linear correlation with concurrent measurements Monte Carlo simulation was then applied select most suitable model relating concentration TM/Landsat reflectance. TM4_sim/TM3_sim ratio provided best R² value...
Abstract Diurnal variations in surface circulation, heat budget and thermal structure were investigated a tropical reservoir using synergistic approach that combines situ observations, remote‐sensing data numerical modelling. The study area, the I tumbiara R eservoir ( B razil) at beginning of austral winter, is characterized by presence weak stratification passage several cold fronts. Both observations modelling showed circulation wind‐driven. strongest water current was observed 13:00 h,...
O Instituto Nacional de Pesquisas Espaciais (INPE) opera desde 1988 o Projeto Monitoramento do Desmatamento na Amazônia por Satélites (PRODES), cujo principal objetivo é fornecer taxa anual desmatamento florestal da Legal Brasileira utilizando imagens satélite sensoriamento remoto. Esse levantamento envolve mapeamento mais quatro milhões km2 e os resultados obtidos são utilizados pelo governo brasileiro no estabelecimento acompanhamento das políticas públicas relativas ao controle combate...