REFERENCE FLOW FOR GRANTING RIGHTS TO USE WATER RESOURCES IN NEGRO RIVER

• DOI: 10.22533/at.ed.3173142302054

• Palavras-chave: Grant of Use, Water Resource, Flow

• Keywords: Grant of Use, Water Resource, Flow

• Abstract:

   Themes related to water resources can be analyzed from different perspectives, among these are the studies that prove that this element has come to be endowed with economic value due to the various uses for human purposes, since this natural asset is non-renewable and has availability finite. One of the ways to verify the water availability among users is through the analysis of the reference flow in a given body of water. Thus, the purpose of this article is to gather data on minimum and maximum flows and reference flow of the Negro River sub-basin from the Serrinha Fluviometric Station, in periods of floods and ebbs of the river. The records used started from a 30-year interval, over the years 1978 to 2019, in which they were used for the composition of the hydrogamma of maximum and minimum flows and elaboration of the permanence curve. Under this parameter, the flow values vary between 28.124,52 m³/s in june and 11.444,56 m³/s, in February. Based on the permanence curve, which is an important resource for granting purposes, it has been shown that the water availability of the Negro River in 95% of the time is maintained at the flow of 7.266,01 m³/s. Based on the results obtained, it is inferred that this sub-basin has great potential for water availability.