IMPACT OF PRECIPITATION FLUCTUATIONS ON VEGETATION DYNAMICS: A SPATIOTEMPORAL REMOTE SENSING ANALYSIS IN PERNAMBUCO'S SEMI-ARID REGION, BRAZIL
DOI:
https://doi.org/10.14393/RCG2610676114Keywords:
CHIRPS, MODIS, Seasonally dry forestsAbstract
Vegetation cover in seasonally dry forests, such as the Caatinga, is intrinsically linked to rainfall. Temporal data from sensors like MODIS TERRA-AQUA, combined with the CHIRPS precipitation product, allow for the monitoring of this relationship. This study aimed to evaluate the spatial dynamics of vegetation cover in the Pajeú River watershed (PE), between 2010 and 2022, through land use and land cover analysis and time series of the NDVI, EVI, and Albedo indices derived from MODIS, correlating these variables with CHIRPS data and quantifying vegetation-precipitation relationships. The results showed significant correlations: precipitation had a direct relationship with the mean values of NDVI (wet season: 0.60; dry season: <0.20) and EVI (wet season: >0.40; dry season: <0.20), and an inverse relationship with Albedo (dry season: >0.16). In 2022, there was a 15% reduction in vegetated areas during the dry season, highlighting the vulnerability of vegetation to hydrological seasonality, resulting in reduced vegetation cover and increased areas of exposed soil. It is concluded that the integration of MODIS and CHIRPS data proved to be an effective tool for monitoring vegetation responses to rainfall seasonality, providing valuable support for water resource management in semi-arid regions.
Downloads
Downloads
Published
Issue
Section
License
Copyright (c) 2025 Ubiratan Joaquim da Silva Junior, Murilo Oliveira da Costa, Juarez Antonio da Silva Junior, João Victor de Albuquerque Roberto, Anderson Luiz Ribeiro de Paiva, Sylvana Melo dos Santos, Leidjane Maria Maciel de Oliveira

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Autores que publicam nesta revista concordam com os seguintes termos: a) Autores mantém os direitos autorais e concedem à revista o direito de primeira publicação, com o trabalho licenciado sob a Creative Commons Atribuição-NãoComercial-SemDerivações 4.0 Internacional. b) Autores têm permissão e são estimulados a publicar e distribuir seu trabalho online (ex.: em repositórios institucionais ou na sua página pessoal), já que isso pode gerar alterações produtivas, bem como aumentar o impacto e a citação do trabalho publicado. c) Em virtude de aparecerem nesta revista de acesso público, os artigos são de uso gratuito, com atribuições próprias, em aplicações educacionais e não-comerciais.




