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Assessing land-use and carbon stock in slash-and-burn ecosystems in tropical mountain of Laos based on time-series satellite images Inra
Inoue, Y.; Kiyono, Y.; Asai, H.; Ochiai, Y.; Qi, J.; Olioso, A.; Shiraiwa, T.; Horie, H.; Saito, T.; Dounagsavanh, L..
In the tropical mountains of Southeast Asia, slash-and-burn (S/B) agriculture is a widely practiced and important food production system. The ecosystem carbon stock in this land-use is linked not only to the carbon exchange with the atmosphere but also with food and resource security. The objective of this study was to provide quantitative information on the land-use and ecosystem carbon stock in the region as well as to infer the impacts of alternative land-use and ecosystem management scenarios on the carbon sequestration potential at a regional scale. The study area was selected in a typical slash-and-burn region in the northern part of Laos. The chrono-sequential changes of land-use such as the relative areas of community age and cropping (C) + fallow...
Tipo: Journal Article Palavras-chave: STOCK DE CARBONE; BRULIS CARBON SEQUESTRATION; REMOTE SENSING; SHIFTING CULTIVATION; SLASH-AND-BURN.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20104a22ea78&uri=/notices/prodinra1/2010/07/
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Future directions for advanced evapotranspiration modeling: assimilation of remote sensing data into crop simulation models and SVAT models Inra
Olioso, A.; Inoue, Y.; Ortega-Farias, S.; Demarty, J.; Wigneron, J.P.; Braud, I.; Jacob, F.; Lecharpentier, P.; Ottlé, C.; Calvet, J.C.; Brisson, N..
Soil-Vegetation-Atmosphere Transfer Models (SVAT) and Crop Simulation Models describe physical and physiological processes occurring in crop canopies. Remote sensing data may be used through assimilation procedures for constraining or driving SVAT and crop models. These models provide continuous simulation of processes such as evapotranspiration and, thus, direct means for interpolating evapotranspiration between remote sensing data acquisitions (which is not the case for classical evapotranspiration mapping methods). They also give access to variables other than evapotranspiration, such as soil moisture and crop production. We developed the coupling between crop, SVAT and radiative transfer models in order to implement assimilation procedures in various...
Tipo: Journal Article Palavras-chave: ASSIMILATION DE DONNÉES; SIMULATION DE CULTURE; HUMIDITÉ ASSIMILATION OF DATA INTO MODELS; CROP SIMULATION MODEL; EVAPOTRANSPIRATION; IRRIGATION; REMOTE SENSING; SOIL; VEGETATION; ATMOSPHERE TRANSFER MODEL.
Ano: 2005 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB0600036125111436&uri=/notices/prodinra1/2010/11/
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Traceability of slash-and-burn land-use history using optical satellite sensor imagery: a basis for chrono-sequential assessment of ecosystem carbon stock in Laos Inra
Inoue, Y.; Qi, J.; Olioso, A.; Kiyono, Y.; Horie, T.; Asai, H.; Saito, K.; Ochiai, Y.; Shiraiwa, T.; Douangsavanh, L..
This study examined the use of satellite sensor imagery for chronosequential assessment of land use and ecosystem carbon stock in slash-and-burn (S/B) regions of Laos. The segmentation approach was useful because the boundaries of S/B patches are subject to change due to natural or anthropogenic factors. Polygon-based classification using six optical bands of Landsat Enhanced Thematic Mapper Plus (ETM+) imagery showed that S/B patches could be discriminated with high accuracy (0.98). Normalized difference spectral indices, NDSI[i, j] = [Rj -Ri ]/[Rj +Ri ], using reflectances Rj and Ri at j and i nm wavelengths for S/B polygons during four consecutive years (1999-2002) showed that NDSI[2215, 830], NDSI[1650, 830] and NDSI[660, 830] ( = the normalized...
Tipo: Journal Article Palavras-chave: IMAGERIE SATELLITAIRE; CULTURE SUR BRULIS REMOTE SENSING; SATELLITE SENSOR IMAGERY; ECOSYSTEM; CARBON; SLASH AND BURN.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008a4bda9e0&uri=/notices/prodinra1/2008/09/
Registros recuperados: 3
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