Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/50006
Title: Hydrological regionalization of streamflows for the Tocantins River Basin in Brazilian Cerrado biome
Other Titles: Regionalização hidrológica de vazões para a bacia do rio Tocantins no bioma Cerrado brasileiro
Keywords: L-Moments method
Statistical hydrology
Water use rights concessions
Concessões de direitos de uso de água
Hidrologia estatística
Issue Date: 2021
Citation: RODRIGUES, J. A. M. Hydrological regionalization of streamflows for the Tocantins River Basin in Brazilian Cerrado biome. Revista Ambiente e Água, Taubaté, v. 16, n. 6, 2021.
Abstract: The Brazilian Cerrado biome is the largest and richest tropical savanna in the world and is among the 25 biodiversity hotspots identified worldwide. However, the lack of adequate hydrological monitoring in this region has led to problems in the management of water resources. In order to provide tools for the adequate management of water resources in the Brazilian Cerrado biome region, this paper develops the regionalization of maximum, mean and minimum streamflows in the Tocantins River Basin (287,405.5 km2), fully located in the Brazilian Cerrado biome. The streamflow records of 32 gauging stations in the Tocantins River Basin are examined using the Mann-Kendall test and the hydrological homogeneity non-parametric index-flood method. One homogeneous region was identified for the estimate of the streamflows Qltm (long-term mean streamflow), Q90% (streamflow with 90% of exceeding time), Q95% (streamflow with 95% of exceeding time) and Q7,10 (minimum annual streamflow over 7 days and return period of 10 years). Two homogeneous regions were identified for maximum annual streamflow estimation and the Generalized Extreme Value distribution is found to describe the distribution of maximus events appropriately within the both regions. Regional models were developed for each streamflow of each region and evaluated by cross-validation. These models can be used for the estimation of maximum, mean and minimum streamflows in ungauged basins within the Tocantins River Basin within the area boundaries identified. Therefore, the results provided in this paper are valuable tools for practicing water-resource managers in the Brazilian Cerrado biome.
URI: http://repositorio.ufla.br/jspui/handle/1/50006
Appears in Collections:DEG - Artigos publicados em periódicos



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