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QSWAT Model Calibration and Uncertainty Analysis for Stream Flow Simulation in the Patapur Micro- Watershed Using Sequential Uncertainty Fitting Method (SUFI-2)

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Title QSWAT Model Calibration and Uncertainty Analysis for Stream Flow Simulation in the Patapur Micro- Watershed Using Sequential Uncertainty Fitting Method (SUFI-2)
Not Available
 
Creator B. D. Premanand, U. Satishkumar, B. Maheshwara Babu, S. K. Parasappa, Mallikarjuna M. Dandu, Ibrahim Kaleel, N.L. Rajesh and S.A. Biradar
 
Subject Patapur microwatershed, Soil and Water Assessment Tool (SWAT)
 
Description Not Available
The Patapur micro-watershed situated in semi-arid region needs effective management of resources
for sustainable agriculture. The Soil and Water Assessment Tool (SWAT), a semi distributed
physically based model, was chosen and set up in the Patapur micro-watershed for hydrologic
modeling. SWAT-CUP (SWAT-Calibration and Uncertainty Programs) was used for model
calibration, sensitivity and uncertainty analysis, following the Sequential Uncertainty Fitting (SUFI2) technique. The model calibration was performed for the period (2009–2014), with initial 3 years
of warm up (2009–2012), then, the model was validated for the subsequent 2 years of data (2014–
2006). To assess the competence of model calibration and uncertainty, two indices, the p-factor
(observations bracketed by the prediction uncertainty) and the r-factor (achievement of small
uncertainty band), were taken into account. The results had shown that p-factor for daily, monthly
and annual time step were 0.07 (7%), 0.11(11%), 1.0 (100%), respectively while r-factor for daily,
monthly and annual were 0.07 (7%), 0.33 (33%) and 0.0 (0%), respectively, while during the
validation p factor and r-factor for daily, monthly and annual were 0.85, 0.17 and 1, respectively.
Whereas r-factor for daily, monthly and annual time step were 0.05 (5%), 0.24(24%) and 0,
respectively. After a rigorous calibration and validation, the goodness of fit was further assessed
through the use of the coefficient of determination (R2
) and the Nash–Sutcliffe efficiency (NS)
between the observed and the final simulated values. The results indicated that R2
and NS were 0.88
and 0.87, respectively, during the daily calibration. The validation also indicated a satisfactory
performance with R2
of 0.63 and NS of 0.64. The results would be useful to the hydrological
community, water resources managers involved in agricultural water management and soil
conservation, as well as to those involved in mitigating natural hazards such as droughts and floods.
Not Available
 
Date 2019-11-13T03:56:27Z
2019-11-13T03:56:27Z
2018-04-10
 
Type Article
 
Identifier B. D. Premanand, U. Satishkumar, B. Maheshwara Babu, S. K. Parasappa, Mallikarjuna M. Dandu, Ibrahim Kaleel, N.L. Rajesh and S.A. Biradar, 2018. QSWAT Model Calibration and Uncertainty Analysis for Stream Flow Simulation in the Patapur Micro- Watershed Using Sequential Uncertainty Fitting Method (SUFI-2), International Journal of Current Microbiology and Applied Sciences7, 831-852.
ISSN: 2319-7706
http://krishi.icar.gov.in/jspui/handle/123456789/24672
 
Language English
 
Relation Not Available;
 
Publisher E P Excellent Publishers