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Parameterization and uncertainty analysis of stream flow in the Barak River basin – a case study
In this study, estimation of discharge and uncertainty analysis of streamflow estimation is done for the Barak River basin using Soil and Water Assessment Tool (SWAT) and sequential uncertainty domain parameter fitting algorithm (SUFI-2), respectively. Here, the estimation of discharge from the Barak River catchment with an outlet at Badarpurghat is done. Calibration and parameter uncertainty analysis was done using SUFI-2 which is being used for hydrologically distributed model like SWAT. The model was calibrated and validated by means of observed discharge data for the years 2001–2004 and 2011–2012, respectively. Evaluation of the performance of SUFI-2 was carried out considering six objective functions, namely determination coefficient R2, Nash-Sutcliffe efficiency (NSE), per cent bias (PBIAS), p-factor, r-factor, and determination coefficient divided by regression coefficient bR2 calculated on daily basis. In Calibration, the values of R2 and NSE were found to be 0.73 and 0.71, whereas in validation 0.54 and 0.52 on daily basis, respectively. The findings showed that the observed and simulated daily streamflow were not much different at 95PPU (95% level of prediction uncertainty). During calibration process, the efficiency is better, but during the validation process it shows comparatively poor performance considering the uncertainty.
Parameterization and uncertainty analysis of stream flow in the Barak River basin – a case study
In this study, estimation of discharge and uncertainty analysis of streamflow estimation is done for the Barak River basin using Soil and Water Assessment Tool (SWAT) and sequential uncertainty domain parameter fitting algorithm (SUFI-2), respectively. Here, the estimation of discharge from the Barak River catchment with an outlet at Badarpurghat is done. Calibration and parameter uncertainty analysis was done using SUFI-2 which is being used for hydrologically distributed model like SWAT. The model was calibrated and validated by means of observed discharge data for the years 2001–2004 and 2011–2012, respectively. Evaluation of the performance of SUFI-2 was carried out considering six objective functions, namely determination coefficient R2, Nash-Sutcliffe efficiency (NSE), per cent bias (PBIAS), p-factor, r-factor, and determination coefficient divided by regression coefficient bR2 calculated on daily basis. In Calibration, the values of R2 and NSE were found to be 0.73 and 0.71, whereas in validation 0.54 and 0.52 on daily basis, respectively. The findings showed that the observed and simulated daily streamflow were not much different at 95PPU (95% level of prediction uncertainty). During calibration process, the efficiency is better, but during the validation process it shows comparatively poor performance considering the uncertainty.
Parameterization and uncertainty analysis of stream flow in the Barak River basin – a case study
Pathan, Shehnaj Ahmed (Autor:in) / Sil, Briti Sundar (Autor:in)
ISH Journal of Hydraulic Engineering ; 27 ; 460-470
02.10.2021
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
SWAT model , streamflow , calibration , Barak River , SUFI-2
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