Abstract The present research aimed to demonstrate the feasibility of using image segmentation for better drainage extraction, automated drainage network hierarchization and main channel definition based on Horton (1945). The test area for the applications was the Bandeirinha Stream Hydrographic Basin (BSHB), which is located in the municipality of Formosa, in the state of Goiás, Brazil. The study used the Shuttle Radar Topography Mission (SRTM), with a spatial resolution of 1" x 1" (one arc second). The SRTM segmentation was performed using the Python language ODR_Obia algorithm, inserted with a QGIS plugin. Through the QGIS platform, the ODR_Hidro plugin was used to perform the delimitation of the BSHB, the extraction of the drainages and the definition of the main channel. The results were validated in the field and evaluated from the manual definition of the main channel. That was done using both the data produced by the application and the drainage data contained in the vector base of the topographic maps of the Army of Geographic Service (AGS), at the scale of 1:100,000 and 1:25,000. From the results obtained, it can be inferred that the ODR_Hidro model used for the delimitation of the BSHB, the automated hierarchization of the drainages and the definition of the main channel from the segmented SRTM image is very efficient. The field validation demonstrated its effectiveness by proving the existence of first-order drainages which are not mapped on the DSG chart at a scale of 1:100.000. This leads to the conclusion that the use of the proposed tools and the inclusion of image segmentation, aiming for the extraction of drainage network and geomorphometric characterization of watersheds, can efficiently contribute to the provision of morphometric data.

The study aimed to draw a first draft of the geo-tourist potential of the region near the Federal District of Brazil, having as parameter the preliminary geological and geomorphologic potential of the region, as well as an analysis of public policy initiatives already underway. The results point to a growing demand technical and professional personnel from the geotourism and especially the need for investments in scientific research for the identification and investigation of criteria for identifying sites Geotourism.

El trabajo tuvo como objetivo central esbozar el potencial geoturístico en la región próxima al Distrito Federal de Brasil, teniendo como parámetros preliminares el potencial geológico y geomorfológico de la región. También se centró en el análisis de las iniciativas de las políticas públicas en curso. Los resultados indican una demanda técnica y profesional creciente considerando el área de geoturismo y principalmente la necesidad de inversiones en investigaciones científicas para identificar y estudiar los criterios para definir los sitios geoturísticos.

Para compreender bacias hidrográficas, é necessário que todos os elementos da paisagem sejam analisados de maneira transversal, no tempo e no espaço. Esse trabalho teve como objetivo analisar a bacia de contribuição direta da Lagoa Mirim por meio dos tipos de uso da terra e seus impactos nas áreas úmidas nela situadas. Utilizando um Sistema de Informações Geográficas, foram calculados, por meio de dois modelos, o MQUAL e o PLOAD, parâmetros de carga poluidora e identificadas áreas mais ameaçadas por poluição, a partir do tipo de uso da terra. As análises revelaram a necessidade de uma gestão compartilhada da bacia.

To understand the river basin, it is necessary to analyze all elements of the landscape in a transversal way, in time and space. The objective of this work was to analyze the basin of direct contribution of the Lagoa Mirim by the types of the land use and its impacts in the wetlands of the basin. Using a Geographic Information System, load polluting parameters were calculated by two models, the MQUAL and the PLOAD, identifying the most threatened areas by pollution. The analyzes revealed the necessity of a shared management of the basin.