A mathematical model for nonlinear hydrologic systems

摘要: A new type of mathematical model for hydrologic systems is introduced. This decomposition represents nonlinear time-lag systems, in decomposed form, by a series combination parallel linear and no-time-lag systems. Thus the assumption that are no longer postulated. The theory its use prediction system output, given input, discussed. Computational algorithms construction output given. number models have been constructed small watershed. These computational experiments established applicability proposed method practicality terms ease application cost. It also shown how specific parameters can be determined. include length record needed to obtain reasonable quality, maximum time lag degree nonlinearity, details structure. In particular, 2.33-acre watershed it was found 3000 hours suffices derivation, approximately 5 hours, three up fourth-order nonlinear, had included model.