2012 年 18 巻 p. 459-464
The parameter optimization method based on observed water surface of flood flows for distributed rainfall-runoff and 2D flood flows simulation model was examined. The design of experiments and response surface method were used for the optimization method. The rain-fall runoffs were simulated by a distributed hydrological model using a high-resolution scheme. The flood flows in the main river and a tributary were simulated simultaneously by the 2D unsteady free-surface flow model with treatment of parallel computation and sink term semi-implicitly. The flooding event in the Onga river basin in July 2003, 2009 and 2010 were simulated by the model. The simulated results were compared with the observed water level. It shows that the optimization method is a useful tool for parameter estimation..
