Journal
HYDROLOGICAL PROCESSES
Volume 27, Issue 12, Pages 1691-1700Publisher
WILEY
DOI: 10.1002/hyp.9341
Keywords
multi-site evaluation; ungauged watershed; regionalization; parameter extrapolation; spatial distribution; modelling
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Funding
- Korea Meteorological Institute (KMI) [APCC12-01] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Simulation of watershed scale hydrologic and water quality processes is important for watershed assessments. Proper characterization of the accuracy of these simulations, particularly in cases with limited observed data, is critical. The Soil & Water Assessment Tool (SWAT) is frequently used for watershed scale simulation. The accuracy of the model was assessed by extrapolating calibration results from a well studied Coastal Plain watershed in Southwest Georgia, USA, to watersheds within the same geographic region without further calibration. SWAT was calibrated and validated on a 16.7-km2 subwatershed within the Little River Experimental Watershed by varying six model parameters. The optimized parameter set was then applied to a watershed of similar land use and soils, a smaller watershed with different land use and soils and three larger watersheds within the same drainage system without further calibration. Simulation results with percent bias (PB) +/- 15%PB<+/- 25% and Nash-Sutcliffe efficiency (NSE) 0.50
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