角屋・永井法の長短期流出両用モデルの適応性

The parameters of the model proposed by Kadoya and Nagai are rewritten by means of a conversion coefficient and mean slope length of basin model, aiming at relation with the parameters of the kinematic wave runoff model. Runoff analysis by the model uses two calculation techniques. The one is to give the first upper tank the rainfall intensity as a state of pulse. And the other is to solve differential storage equations under the condition of uniform rainfall intensity in every time interval of calculation.
Simulated hydrographs are examined for the data observed at three basins. In River Hii, the optimum parameters of the model are identified for the daily and flood data of the period of 1971-1973. The results of flood analys is at the area of land reclamation in Masuda and Shimokari river basin show that maximum interception of rain water is over 5mm and introducing the effect of depression storage on the land surface is necesarry for the model. Simulated flood hydrographs by the second calculation technique, which is used the improved Euler method, agree well with observed one and prove usefullness of the model proposed by Kadoya and Nagai beyond the Sugawara's tank model.