Identified Model Parameterization, Calibration, and Validation of the Physically Distributed Hydrological Model WASH123D in Taiwan
Publication: Journal of Hydrologic Engineering
Volume 16, Issue 2
Abstract
Typhoon-induced flood and inundation are among the major natural disasters in Taiwan. To understand and mitigate these hydrological hazards, adequate modeling tools on watershed scales are necessary. This paper describes the calibration and validation of a river basin using a physics-based watershed model, WASH123D. The key objective is to demonstrate the enable technology of using physics-based watershed models rather than lump parameter or statistical models. An ad hoc calibration procedure based on our understanding of the target river basin was employed. Systematic parameter optimizations would be addressed in subsequent studies. The Lanyang Creek basin situated in northeastern Taiwan is chosen as the study area. Two years of data (2004 and 2005) were used to examine event-based responses and long-term predictions. Both parametric work and hydrology issues are discussed. The simulated magnitude and time lag of the flow peak are compared with the observation. The results indicate that the proposed model could indeed provide Taiwan Typhoon and Flood Research Institute with a useful protocol for research, prediction, and forecast related to watershed hydrology.
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Acknowledgments
The writers are grateful to the Water Resource Agency, Central Geological Survey, Soil and Water Conservation Bureau, and Forestry Bureau in Taiwan for providing us with valuable data.
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Information
Published In
Journal of Hydrologic Engineering
Volume 16 • Issue 2 • February 2011
Pages: 126 - 136
Copyright
© 2011 ASCE.
History
Received: Nov 2, 2009
Accepted: Jun 14, 2010
Published online: Jul 19, 2010
Published in print: Feb 2011
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