Abstract
A hybrid runoff model is developed using the 1-D Richards equation and the linear output generator, which is a linear system generating the specific runoff discharge from the pressure head. The model is advantageous because the 1-D Richards equation reflects the physical characteristics of the watershed and because the linear output generator deals with modelling errors and parameter variations. A systematic methodology for identifying the model from observed data series is presented and is applied to a study area. After examining the results of calibration for parameters of the linear output generator, numerical simulations are performed to verify the validity of the model.
