Subsídios para Delimitação de Bacias Hidrográficas
Keywords:
Ottobacia; Bacia Hidrográfica; Topologia, Assimetria da InformaçãoAbstract
: This paper presents the result of a method for watershed’s delimitation, against the background of the Google Road map and the hydrographic network of a selected basin. The user defines, in a digital way, any point on the map, then both the watershed upstream of the selected point and the routing of the flow leaving this watershed will be delimited. Subsidies for the development of an application are presented with the aim of providing the user with knowledge of the boundary of the watershed at the selected point and the destination of the flow and loads generated in this basin. The current version, in addition to the features of the basin and downstream river, presents the area and number of river sections in the selected basin. However, the integration with other databases allows the presentation, for example, of quantitative and qualitative balances throughout the entire selected basin. The application uses the free software QGis, the Python programming language, and BHO Ottobacias 2017_5k made available by the Agência Nacional de Água e Saneamento Básico - ANA. The use of this method with other bases will allow the processing of other information and its replication for any basin on the planet. This functionality reduces the asymmetry of information about the watershed, helping the user to understand the hydrological processes that occur in different parts of the basin, increasing their ability to discuss and give their opinion about the actions in the basin. This fact has great relevance in the discussion of actions and investments in a watershed, whether by the decision-maker, the participants of the committees, or the entire population, which will have a better understanding of the relationship between the actions developed in the basin and the quality and quantity of water resources.
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