Model for Estimating the Time of Concentration in Watersheds

Isabel Kaufmann Almeida (), Aleska Kaufmann Almeida, Jorge Luiz Steffen and Teodorico Alves Sobrinho
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Isabel Kaufmann Almeida: Universidade Federal de Mato Grosso do Sul (UFMS)
Aleska Kaufmann Almeida: Universidade Federal de Mato Grosso do Sul (UFMS)
Jorge Luiz Steffen: Universidade Federal de Mato Grosso do Sul (UFMS)
Teodorico Alves Sobrinho: Universidade Federal de Mato Grosso do Sul (UFMS)

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), 2016, vol. 30, issue 12, No 4, 4083-4096

Abstract: Abstract The time of concentration for a watershed is an essential parameter to the design of any hydrological project. In this study, a time of concentration estimation-model that uses variables obtained by monitoring rainfall-runoff events in a rural watershed of a tropical climate is proposed. In developing the model, the relationship between the time of concentration and independent variables was verified using a linear correlation matrix. Two variables with the highest correlation coefficient were selected to derive a model that can estimate the time of concentration. The Harmony Search (HS) optimization algorithm was employed to optimize the model parameters. The performance of the model was evaluated based on the Nash–Sutcliffe (NS) coefficient, which yielded a value greater than 0.80. The proposed model allows one to estimate the time of concentration using only the hydrograph of an event at the base level of a watershed, without the use of rainfall data.

Keywords: Hydrographs; Surface runoff; Time factors; Hydrology; Parameters; Harmony search (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1007/s11269-016-1383-x

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