Monitoring of degradation in the Caatinga biome in the semi-arid northeastern region, Brazil
artículo original
Date
2020Author
Silva, Douglas Alberto de Oliveira
Montenegro, Suzana Maria Gico Lima
Lopes, Pabricio Marcos Oliveira
Silva, Jhon Lennon Bezerra
Santos, José Ediclécio Barbosa dos
da Silva, Edvânia Matias
Correio, Adiel Felipe da Silva Cruz
dos Santos, Wellington Manoel
Acuña Chinchilla, Sisgo Rachith
Silva, Ricardo Barros
Cesar, Dayane do Nascimento
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Show full item recordAbstract
Degradation of Caatinga biome has created desertification processes in several areas, inducing big microclimate and
surface changes. Therefore, it is fundamental develop research methods capable of identifying areas under degradation
process. Satellite images in different spatial, temporal, radiometric and spectral resolutions are being used to monitor big
areas from several biomes worldwide. The objective of this study was to evaluate and quantify the degree of degradation
and preservation of the Caatinga biome, using geoprocessing methods and remote sensing products, using surface data
and Landsat-8 images for 2013, 2014 and 2015. Remote sensing methods were used to estimate the Normalized Difference
Vegetation Index (NDVI), surface albedo (α) and Moving Standard Deviation Index (MDSI). The results showed that the
vegetation indexes and the techniques of degradation and change detection satisfactorily identified the behavior of the
surrounding vegetation in the study area, standing out as good indices for degradation processes in the semiarid. It was
concluded that change detection and classification by decision tree methods were efficient in the identif ication of
anthropized areas during the experimental period. La degradación del bioma Caatinga ha creado procesos de desertificación en varias áreas, induciendo grandes cambios
en el microclima y la superficie. Por lo tanto, es fundamental que se desarrollen métodos de investigación capaces de
identificar áreas en proceso de degradación. Las imágenes de satélite con diferentes resoluciones espaciales, temporales,
radiométricas y espectrales se están utilizando para monitorear grandes áreas de varios biomas en todo el mundo. El
objetivo de este estudio fue evaluar y cuantificar el grado de degradación y preservación del bioma Caatinga, utilizando
métodos de geoprocesamiento y productos de teledetección, usando datos de superficie e imágenes Landsat-8 para 2013,
2014 y 2015. Se utilizaron métodos de teledetección para estimar el Índice de Vegetación de Diferencia Normalizada
(NDVI), el albedo de superficie (α) y el Índice de Desviación Estándar Móvil (MDSI). Los resultados mostraron que los
índices de vegetación y las técnicas de monitoreo de la degradación y detección de c ambios identificaron
satisfactoriamente el comportamiento de la vegetación circundante en el área de estudio, destacándose como buenos índices de los procesos de degradación en el semiárido. Se concluyó que los métodos de detección y clasificación de
cambios por árbol de decisión fueron eficientes en la identificación de áreas antrópicas durante el período experimental.
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- Agronomía [1485]
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