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. In addition, SWAT-CUP was recently developed and provides a decision-making framework that incorporates a semi-automated approach (SUFI2) using both manual and automated CALIBRATION and incorporating sensitivity and uncertainty analysis.
tainty analysis and is used to provide statistics for goodness-of-fit. The user interaction or manual component of the SWAT-CUP calibration forces the user to obtain a better understanding of the overall hydrologic processes (e.g., baseflow ratios, ET, sediment sources and sinks, crop yields, and nutrient balances) and of parameter sensitivity.
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