Caracterização hidrogeomorfológica do entorno da jazida fósforo-uranífera de Itataia, Ceará, Brasil

Abstract

The occurrence of uranium and phosphate in the repository of Itataia launches naturally radionuclides in the environment through the erosive action of wind and rain. The economic importance of ore and the impacts of its mining generate polemics in relation to the environmental cost of the activity. The surface erosion and transport of material is directly related to the amplitude and steepness of the reliefs and the materials and processes involved, thereby hydrology plays an important role in the study of radioactive contaminant transport. The recognition of terrain features is important to determine the stability of the environment and the use of geotechnology has facilitated the acquisition and processing of spatial information, collaborated with research on management and monitoring uses. This research aims to provide information about the relief features, drainage and defining the perimeter of the sub basin of Cunha Moti river, Ceará, Brasil. For processing were used SRTM 1Arc images obtained via free download and ArcGis software 10. Results generated cartograms enabled the recognition of hydro geomorphological factors that act to the dispersion of radioactive material in the vicinity of the mine.