ESTUDO GEOHIDROAMBIENTAL COMO FERRAMENTA PARA GESTÃO TERRITORIAL SUSTENTÁVEL DE BACIAS HIDROGRÁFICAS: O CASO DA MICROBACIA DO CÓRREGO BREJO COMPRIDO EM PALMAS – TO

Abstract

Brejo Comprido’s microbasin has a great matter to the city of Palmas, in the state of Tocantins, Brazil because of its multiple utilizations as public water supply, recreation, garden irrigation, wastewater dilution, etc. Therefore, it turns to be necessary to know about its geophysics characteristics in order to help manage the use and occupation of the land, as well as sustainable conserving it for the future generations. The GIS – Geographic Informations System toll, jointed with ArcGIS software, “SEPLAN” – Tocantins’ Budget and Planning Secretary topographic letters (scale 1:250.000) and SRTM – Shuttle Radar Topography Mission images, enabled the raising and processing of the physiographic data for the calculation of physic parameters that constitute this microbasin geologic and geomorphologic characteristics. As conclusive results were found that the Brejo Comprido’ microbasin is classified as 2^nd order, having a tendency to an elongated shape (compactness coefficient of 1.311, shape factor of 0.32 and sinuosity index of 0.931), as well as low susceptibility for flooding, dendritic draining standard and low sinuosity.