A runoff analysis is developed as a clue for estimating prob. lems of the effective rainfall in the multipule land-use basin which is partly developed by field reclamation at improved slope. The outline is as follows.
(1) The runoff model, which is named KiWS Model II (Kinematic Wave Storage Model II), is combined kinematic wave runoff model with LST-II Model (the Long and Short Terms Runoff Model) proposed by Kadoya and Nagai. Namely, the upper zone of the model is composed by kinematic wave model and the lower zone of one is the same with the LST-II model.
(2) The effective rainfall concerned in the surface runoff and/or prompt subsurface runoff is automatically computed in KiWS Model II.
(3) The routine phases of rainwater flow on hillslope and stream flow in stream network are expressed by the kinematic wave model, in which the effective rainfall series are given as input condition corresponding to land use of each basin block.
(4) By a runoff simulation considering the effects of basin development, it is shown that the KiWS Model II is expected to apply as a practical model to runoff analysis for multiple land-use basin.