Unsteady separated flow behind a structure causes various effects around them hydrodynamically and environmentally. This paper deals with the modeling of discrete vortices induced by a simple inclined flat plate in uniform flow.
　Hydraulic model experiments were conducted so as to obtain the basic information on shedding vortex street behind an inclined flat plate. Due to experiments, shedding vortices formulates Maues vortex street. Observed Strouhal number is 0.15～0.19.
　A discrete vortex model was developed. Four parameters are necessary to assign. The value of each parameter is chosen in order to generate most fitted flow with that by hydraulic model experiments. These parameters are expressed as functions of Reynolds number (Re) by dimensional analysis. These functions can evaluate the value of the parameters for wider range of flow (Re =3000～17000).
　This numerical model was applied to the estimation of flow around a set of double-inclined-plates. The residual flow around double-inclined-plates showed the existence of circulate flow which gives a one-directional residual flow.