2024 Volume 80 Issue 16 Article ID: 23-16162
This study examined the following (A) and (B): (A) the reproducibility of subsurface and surface flows in a rainfall-runoff and flood inundation model; (B) the usefulness of parameter estimation methods using Bayesian optimization. We also conducted experiments on subsurface and surface flows. The following (1)-(4) were confirmed through the examinations: (1) Under conditions of small suction, the model can reproduce the water level and flow rate fluctuation process; (2) the model parameters can be estimated when surface flow occurs, and suction is small; (3) the model can reproduce the experimental results using the optimal parameters in (2); ( 4) parameter estimation for actual soils may be possible under small suction and surface flow conditions. In other cases, soil tests are necessary to determine the parameters.
