A utilização da curva de permanência de vazões como ferramenta para a gestão sustentável dos recursos hídricos

Abstract

The aim of this paper is to discuss the use of the flow permanence curve in water resources management. The permanence curve is an important tool for water resource management, as it allows critical flows (such as those associated with the Q90 and Q95 percentiles) to be identified and the limits for granting water use to be defined. The methodology applied includes the collection of historical flow data available for the selected stretch of the Rio Preto, and the processing, analysis of the data and generation of the permanence curve were carried out using Microsoft Excel software. The results indicate that the Fazenda Bom Jardim station (46770000), located in the municipality of Formosa do Rio Preto (BA), had reference flows of 24.91m m³/s (Q90) and 23.84 m³/s (Q95). The conclusions highlight the importance of updating hydrological data for the effective management of water resources, especially during periods of drought, and the need for more robust public policies to guarantee the sustainable use of water