USLE C factor determined by multi-temporal AVHRR/NOAA-14 data

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dc.contributor.authorCavalli, Antonio Carlos
dc.contributor.authorGarcia, Gilberto José [UNESP]
dc.contributor.authorZullo Jumor, Jurandir
dc.contributor.authorLombardi Neto, Francisco
dc.contributor.institutionCentro de Solos e Recursos Agroambientais (CSRA)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.date.accessioned2022-04-29T08:27:18Z
dc.date.available2022-04-29T08:27:18Z
dc.date.issued2000-01-01
dc.description.abstractThis paper presents a methodology for the integration of AVHRR/NOAA-14 sensor data and USLE (Universal Soil Loss Equation) for identifying soil degradation and mapping erosion risks. The study area was the Piracicaba river watershed (5,457 km 2) located in São Paulo State, Brazil. Thirty percent of the region is covered with sugarcane plantations, which are the raw-material provider both for cane-sugar mills as for carburant-alcohol distilleries. To apply USLE equation, remote sensing and GIS techniques were used. The USLE C factor (use and management) indicates the soil protection provided by the vegetative cover and it changes gradually with the biomass yield. NDVI (Normalised Difference Vegetation Index) was selected to determine C factor since it is commonly used due its high sensitivity in monitoring green biomass. Channels 1 and 2 digital counts from seven AVHRR multi-temporal images from may/1996 to September/1997 were transformed from grey levels to percent of reflectance, since reflectance data are more suitable to get NDVI. Radiometric calibration was applied following the procedures of NOAA/NESDIS (National Environmental Satellite Data and Information Service). Through the NDVI data it was possible to characterise the sugarcane biomass growth and the values of predicting soil losses in a two-harvest period. Five classes of erosion risks were determined: (Class 1: 50.6% of sugarcane crop area; Class 2: 20.6%; Class 3: 24.3%; Class 4: 4.1%; Class 5: 0.3%). The correlation between erosion risk classes and soil types showed that sugarcane is mostly cultivated on soils with better physical characteristics, preferably on less steep slopes.en
dc.description.affiliationInstituto Agronomico de Campinas Centro de Solos e Recursos Agroambientais (CSRA)
dc.description.affiliationUniversidade Estadual Paulista Centro de Planejamento Ambiental (CEAPLA)
dc.description.affiliationUniversidade Estadual de Campinas Centro de Pesquisas em Agricultura (CEPAGRI)
dc.description.affiliationUnespUniversidade Estadual Paulista Centro de Planejamento Ambiental (CEAPLA)
dc.format.extent165-171
dc.identifier.citationInternational Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives, v. 33, p. 165-171.
dc.identifier.issn1682-1750
dc.identifier.scopus2-s2.0-85046288737
dc.identifier.urihttp://hdl.handle.net/11449/228538
dc.language.isoeng
dc.relation.ispartofInternational Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives
dc.sourceScopus
dc.subjectAgriculture
dc.subjectBiomass
dc.subjectErosion
dc.subjectMulti-temporal
dc.subjectSoil conservation
dc.titleUSLE C factor determined by multi-temporal AVHRR/NOAA-14 dataen
dc.typeTrabalho apresentado em evento

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Rio Claro - CEAPLA - Centro de Análise e Planejamento Ambiental