Propriedades das Séries Temporais de NDVI e EVI da Cobertura Vegetal em Áreas de Solos RQo Associadas a Arenização - HAL-SHS - Sciences de l'Homme et de la Société Accéder directement au contenu
Article Dans Une Revue Anuário do Instituto de Geociências Année : 2021

Propriedades das Séries Temporais de NDVI e EVI da Cobertura Vegetal em Áreas de Solos RQo Associadas a Arenização

Résumé

The sandization processes initially conceptualized for the southwestern region of Rio Grande do Sul, also occur in other regions of Brazil. Studies show that the converging point between these areas is the type of soil, the Neossolos Quartzarênicos Órticos (RQo). This article analyzes the properties of the NDVI and EVI time series of vegetation cover in areas of RQo soils in Rio Grande do Sul, Goiás, Tocantins and Piauí, in the period between 2000 and 2015. For this purpose, the proposed methodology uses the following properties: average, trend, interannual variability (IAV) and seasonality of the sensor MODIS, NDVI and EVI time series; soil map and rainfall index of the Tropical Rainfall Measuring Mission (TRMM) satellite. The results show that the behavior of the property values suggests that the vegetation cover in areas with RQo soils in Gilbués / PI and Mateiros / TO are more stable in the time series, without natural or anthropic dynamics that cause major changes in the vegetation’s temporal behavior to be expressed by the trend and IAV properties. Maçambará and Serranópolis with sanding dynamics in the most intense RQo areas, presented more expressive results. Serranópolis for covering extensive areas of pastures and agricultural activities and still conserving a good part of Cerrado remnants stood out with higher values in relation to the trend and seasonality. The variation in seasonality in the four areas is mainly due to seasonal climatic dynamics. The time series of NDVI and EVI MODIS proved to be efficient in showing the temporal variations of the biomass and made it possible to satisfactorily analyze the space-time variation of the greenness of the vegetation cover in areas of RQo soils associated with sanding.

Dates et versions

hal-03214323 , version 1 (01-05-2021)

Identifiants

Citer

Letícia Celise Ballejo da Costa, Laurindo Antonio Guasselli, François Laurent, François Messner. Propriedades das Séries Temporais de NDVI e EVI da Cobertura Vegetal em Áreas de Solos RQo Associadas a Arenização. Anuário do Instituto de Geociências, 2021, 44, ⟨10.11137/1982-3908_2021_44_36729⟩. ⟨hal-03214323⟩
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