IDENTIFICATION OF AREAS SUITABLE TO DESERTIFICATION IN SEASONAL INTERMITTENT BASIN IN THE SEMI-ARID BRAZILIAN

Abstract

This research has the mainly objective to evaluate the geoenvironmental bases to identify and to map the suitable degraded areas to desertification in the Hydrographic Basin of the Acaraú River, in the northeast of Brazil. The integrated geoenvironmental analysis was the methodological north achieved. It was used as techniques the digital process of satelite images (TM e ETM+ LANDSAT data 5 e 7, scenes 217/63, 218/62 218/63. 1:250.000using Land-sat TM data). The river basin was improved as unit of planning and geoenvironmental management. The most suitable areas to desertification are in the geoenvironmental unit of upstream region, medium-high river in the semi-arid. Downstream, medium-down although it has with geomorphological process of accumulation it was observed that there are areas suffering with environmental changes that can damage the ecosystems. The detailed empirical investigations displayed that there are impacts humans activities on the physical environment happen about urbanization, deforestation, irrigation, land use changes and mining. For combat a desertification is need connecting science and publics politic with community-based organization action in this hydrographic basin.