洪水流出モデルの確率過程的評価に関する研究

Abstract

Since various kinds of rainfall-runoff models have been developed, the evaluation of themhas become one of the most important problems. What kind of model should be used fora specific hydrological problem? In this paper, a stochastic method of evaluating rainfall-runoff models is presented. First, the properties of stochastic input-output transformationof hypothetical slope and slope-channel systems are studied by using the kinematic wavemodel and the Monte Carlo simulation technique. Second, the so-called storage functionmodels, which are regarded as ones obtained by simplifying the kinematic wave model, are evaluated by the method considering whether the models preserve the stochatic proper-ties of the system or not. Since rainfall-runoff phenomenon is physical and stochatic, the method presented here is appropriate and useful.