Análisis de la dinámica temporal de la vegetación en zonas impactadas por actividad agrícola, mediante los índices de vegetación evi y ndvi, para el cantón Palora en los años 2000, 2013 y 2022.

Abstract

The objective of the current research work was the analysis of the temporal dynamics of vegetation in areas impacted by agricultural activity through vegetation indices in the Palora County, during the years 2000, 2013, and 2022. It used geographic information systems (GIS) in order to get the acquisition of spatial data from the virtual repository (USGS) Earth Esploret. Applying the ENVI, ArcGIS and QGIS software preprocessed and processed the necessary inputs such as: vegetation covers, land uses, normalized difference vegetation index (NDVI), enhanced vegetation index (EVI,) and meteorological data. Subsequently, it analyzed values: such as change of covers, losses and gains, trend and correlation of vegetation indexes with meteorological variables. The results were as follow: the county presented 39.92% of change from forest to pasture, and from pasture to agriculture, while transient and permanent crops showed losses of 3.9 and 3.57 and gains of 2.20 and 4.31%, respectively. On the other hand, the indices obtained an average of 0.66 with decreasing trends, but the correlation, precipitation has a moderate relationship and temperature is not a significant variable related to the vegetation of the area. It is concluded that vegetation indices allow discriminating the temporal variability of vegetation in agricultural areas taking into account that these changes are due to the invasion of new agricultural areas. Finally, it is recommended to replicate this type of study for the development of projects and policies in the area.