EVALUATION OF THE STORAGE FUNCTION MODEL PARAMETER CHARACTERISTICS

The storage function hydrograph model is one of the most commonly used models for flood runoff analysis in Japan, This paper studies the gen erality of the approach and its application to Japanese basins. Throug h a comparison of the basic equations for the models, the storage func tion model parameters, K, Pt and T-1, are shown to be related to the t erms, k and p, in the kinematic wave model, This analysis showed that P and p are identical and K and T-1 can be related to k, the basin are a and its land use. To apply the storage function model throughout Jap an, regional parameter relationships for K and T-1 were developed for different land-use conditions using data from 22 watersheds and 91 flo od events, These relationships combine the kinematic wave parameters w ith general topographic information using Hack's Law. The sensitivity of the parameters and their physical significance are also described. (C) 1997 Elsevier Science B.V.