پديد آورندگان :
Ghorbani M.A نويسنده , Toomanian M. نويسنده , Najafi M. نويسنده , Cobb L. نويسنده , Van der Maas H. نويسنده
چكيده لاتين :
During the past few decades, simulation of rainfalI-runoff processes has
been transformed into a capability in hydrology with well-established models and
software tools. However, these models transform rainfall into runoff through
continuous mathematical functions overlooking possible discontinuities. The focus
of this paper is on unraveling possible discontinuities to gain a better insight into the
process. It introduces the notion of Cusp Catastrophe developed by Rene Thorn
(1975) to investigate the behavior of rainfalI-runoff processes. The study uses
monthly rainfalI-runoff of the River Aji basin in northwest iran observed for the
period of 1980-2000. The results are strong enough to make a case for applying the
cusp catastrophe model by indicating catastrophic behavior in the rainfall-runoff
hydrology, as the R2 statistic and relative errors for monthly flow discharges are
particularly promising. The simulated results are compared with their corresponding
observed data using a number of performance evaluation criteria. This study
emp.loys the Cuspfit program developed by Cobb, with improvements by Hartelman.
