Análisis multitemporal de las coberturas del uso de suelo en la microcuenca río blanco de San José, municipio de Mogotes, Santander

Abstract

Multitemporal analysis of the coverage of land use is carried out in the Río Blanco micro-basin of San José de Mogotes, Santander, as part of the agricultural frontier to which the area of the Guantiva Regional Integrated Management District of Russia is subjected, Oaks forests and surrounding areas, its ecosystem the Andean Forest is one of the hostpots of biodiversity. The aim is to compare coverage over a period of time from 1987 to 2020. Where, through the delimitation of the watershed in the QGIS program, taking images of the Landsat 4 and 5 satellites together with Sentinel 2; these images were processed into spatial analysis, by means of a supervised classification to obtain the coverage established in the Corine Land Cover methodology, with adaptation for Colombia by IDEAM. Four classes of land cover were obtained, for the different periods studied, finding high dense forest of solid ground, dense wooded herbazal, wooded wooded pastures and bare and degraded lands, which were compared between the different periods of study; the study shows that the most extensive cover in the different periods is that of high dense forest of dry land with more than 72% of the total area of the watershed, in the different years; also the land cover with smaller area for the different years of study, was that of the dense Herbazal of mainland; the year 1997 is shown as the period, where better conservation status shows the basin, Possibly it is related to the social factors of that time; the covers that presented greater change of area in the different periods of time analyzed were Matted pastures and Bare and degraded lands.