Curve of permanence of flows of the river Timbó, State of Santa Catarina, Brazil

Acta Brasiliensis

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Title Curve of permanence of flows of the river Timbó, State of Santa Catarina, Brazil

Streamflow permanence curve of the river Timbó, Santa Catarina, Brazil
 
Creator Back, Álvaro José
Zambrano, Gustavo José Deibler
Corseuil, Cláudia Weber
 
Description A curva de permanência é utilizada como informação de disponibilidade hídrica, sendo adotadas como referência nos processos de gestão de recursos hídricos. No presente estudo foi avaliada e modelada a curva de permanência de vazões do rio Timbó, localizado no Planalto Norte de Santa Catarina. Foram utilizados os dados diários de vazão da estação fluviométrica Santa Cruz do Timbó (Código 65295000) referente ao período de 1975 a 2005. Desta forma, pode-se estabelecer as curvas de permanência para vazões mensais e vazões diárias. Os valores foram adimensionalizados pela vazão média de longo termo e ajustados ao modelo Racional. Também foram determinadas as curvas de permanência de vazões diárias para cada mês, e ajustados os modelos para estas vazões adimensionalizadas pelas vazões médias mensais. Os resultados obtidos mostram que a utilização da curva de permanência mensal superestima os valores de vazão com frequências superiores a 20%. Os modelos ajustados permitem estimar a vazão com pequeno erro padrão de estimativa, sendo os valores do coeficiente de determinação superior a 0,99.
The permanence curve is used as a source of information on water availability. It is adopted as a reference in the processes of management of water resources. In the present study, the streamflow permanence curve of the Timbó River, located in the Northern Plateau of Santa Catarina, was evaluated and modeled. Daily streamflow data of the fluvial station Santa Cruz do Timbó (Code 65295000) were used for the period from 1975 to 2005. Thus, permanence curves can be established for monthly streamflows and daily streamflows. The values were rendered dimensionless by the average long-term streamflow, and adjusted to the Rational model. The daily streamflow permanence curves were also determined for each month, and the models for these non-dimensioned streamflows were adjusted by the average monthly streamflows. The results show that the use of the monthly permanence curve overestimates the streamflow values by frequencies higher than 20%. The adjusted models allow estimating the streamflow with a small estimation standard error. The coefficient of determination is higher than 0.99.
 
Publisher Universidade Federal de Campina Grande - UFCG
 
Date 2019-05-27
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
 
Format application/pdf
 
Identifier http://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/182
10.22571/2526-4338182
 
Source Acta Brasiliensis; Vol 3 No 2 (2019): Acta Brasiliensis; 56-62
Acta Brasiliensis; Vol 3 No 2 (2019): Acta Brasiliensis; 56-62
Acta Brasiliensis; Vol 3 No 2 (2019): Acta Brasiliensis; 56-62
2526-4338
2526-432X
 
Language por
 
Relation http://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/182/64
 
Rights Copyright (c) 2019 Acta Brasiliensis
 

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