Host: Japan Society of Hydrology and Water Resources
Pages 32-
We applied the SCE-UA method to the parameter estimation of distributed runoff model. Target river basin is Toyokawa River, which catchment area is 724 km2. The model is an integrated model of a distributed runoff model and a one-dimensional unsteady flow model. The distributed runoff model incorporates saturation and unsaturated flow, and the mesh size is 100m. We input real river cross section shape into the one-dimensional unsteady flow model at the interval of 200 m. We use DioVISTA Flood for the modeling. We selected 4 parameters to be estimated by SCE-UA. Three flood events in recent years is selected as the target. Parameter estimated took 7 hours 30 minutes by using a PC. The error of the peak discharge was less than 9%, and the error of peak time was less than 5 minutes for the three flood events. A good parameter estimation was achieved by the proposed method.
