Transcription of SWAT: MODEL USE CALIBRATION AND VALIDATION
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SWAT: MODEL USE CALIBRATION AND VALIDATION
Transactions of the ASABE Vol. 55(4): 1491-1508 2012 American Society of Agricultural and Biological Engineers ISSN 2151-0032 1491 SWAT: MODEL USE, CALIBRATION , AND VALIDATION J. G. Arnold, D. N. Moriasi, P. W. Gassman, K. C. Abbaspour, M. J. White, R. Srinivasan, C. Santhi, R. D. Harmel, A. van Griensven, M. W. Van Liew, N. Kannan, M. K. Jha ABSTRACT. SWAT (Soil and Water Assessment Tool) is a comprehensive, semi-distributed river basin MODEL that requires a large number of input parameters, which complicates MODEL parameterization and CALIBRATION . Several CALIBRATION tech-niques have been developed for SWAT, including manual CALIBRATION procedures and automated procedures using the shuf-fled complex evolution method and other common methods.
When calibrating a physically based model like SWAT, it is important to remember that all model input parameters must be kept within a realistic uncertainty range and that no automatic procedure can substitute for actual physical knowledge of the watershed. Keywords. Autocalibration, Hydrologic model, SWAT, Validation.
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