Estimación de la deforestación en una región al sureste de Jalisco, México con el algoritmo BFAST y Collect Earth

Abstract

The forest regions of the state of Jalisco are being impacted by increasingly frequent changes in land use, the southeast region has not been the exception, in recent years the increase in deforestation is more visible due to the increase in the number of avocado crops in forest areas, currently there are no studies that use precise methods to estimate deforestation in the area in recent years. Through the multitemporal analysis of Landsat-NDVI images with the BFAST algorithm, preliminary changes in forest cover were estimated in a period of 18 years starting in the year 2000 and through high-resolution images and the tools contained in Collect Earth were validated these changes, thus recording the coverage after the change, the year, and any other disturbance associated. With the resulting map, the accuracy was calculated by map classes and the deforested area was adjusted, finally the annual deforestation rate was calculated with the FAO equation, in order to make these results comparable with other areas with similar dynamics.  The results show a deforestation of 3,834 ha in a period of eighteen years, which represents a deforestation rate of 0.19% per year, being the largest of these changes towards agricultural land, mainly in the pine and pine-oak covers, in low deciduous forest was only expansion of already existing agricultural areas and frequent fires. The overall accuracy of the map was 82.5 %.