Resumen

The vegetative spaces within an environment undergo changes over the years due to both external and internal agents in a way that is beneficial or detrimental to the ecosystem. This is the case of the eastern region of Tolima, which has been affected mainly by agricultural activities that are developed there as the cultivation of rice, in addition, weather events such as the phenomenon of the child have influenced the evolution of vegetation in this region. The objectives to be developed include determining the behavior of vegetation, analysing the spatial and temporal variability of vegetative behavior and finally identifying the types of vegetation cover within the areas mentioned above. With the help of ArcGIS, software that through the normalized differential vegetation index (NDVI) an analysis was carried out in the department of Tolima, specifically the eastern zone (Coello, Flandes, Espinal, Guamo, Saldaña, Purificación, Prado, Cunday, Suarez, Carmen de Apicalá, Icononzo, Villarrica and Melgar), in such a way that the changes that the vegetal coverage of this zone has undergone between 1970 and 2017 are evidenced. It was evident, in general, that the department of Tolima in the southeast has undergone a series of changes in its vegetation in an irregular manner since they depend on climatic phenomena such as that presented in 2016 by the strong phenomenon of the child or the boom in rice cultivation in the 90's, likewise the efforts to reforest different areas carried out by CORTOLIMA has balanced the percentage of vegetation in the forests.