Data/hora: 12/06/2024 02:21:23

Provedor de dados: | Engenharia Agrícola
País: | Brazil
Título: | Low-flow estimates in regions of extrapolation of the regionalization equations: a new concept
Autores: | Pruski,Fernando F.; Rodriguez,Renata Del G.; Nunes,Aline A.; Pruski,Pedro L.; Singh,Vijay P.
Data: | 2015-10-01
Ano: | 2015
Palavras-chave: | Water availability; Planning and management of water resources; Water safety.
Resumo: | ABSTRACT Knowledge of natural water availability, which is characterized by low flows, is essential for planning and management of water resources. One of the most widely used hydrological techniques to determine streamflow is regionalization, but the extrapolation of regionalization equations beyond the limits of sample data is not recommended. This paper proposes a new method for reducing overestimation errors associated with the extrapolation of regionalization equations for low flows. The method is based on the use of a threshold value for the maximum specific low flow discharge estimated at the gauging sites that are used in the regionalization. When a specific low flow, which has been estimated using the regionalization equation, exceeds the threshold value, the low flow can be obtained by multiplying the drainage area by the threshold value. This restriction imposes a physical limit to the low flow, which reduces the error of overestimating flows in regions of extrapolation. A case study was done in the Urucuia river basin, in Brazil, and the results showed the regionalization equation to perform positively in reducing the risk of extrapolation.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000500808
Editor: | Associação Brasileira de Engenharia Agrícola
Relação: | 10.1590/1809-4430-Eng.Agric.v35n5p808-816/2015
Formato: | text/html
Fonte: | Engenharia Agrícola  v.35 n.5 2015
Fonte: | info:eu-repo/semantics/openAccess