Shaft spillways are a common type of spillways used in dam engineering projects. Vertical circular shaft spillways are often prone to create swirling flow and vortices. These vortices result in air entrainment, causing several operational problems such as; fluctuations of water free-surface, structural vibrations, flow separation, negative pressure and reduction of the efficiency of turbines and pumping systems. Therefore, researchers have investigated various methods for controlling the vortices and swirling flow, changing the inlet by means of Morning glory, Piano key, Daisy (Marguerite)–shape and other reliable inlets. Daisy (Marguerite)–shape inlet increases the discharge capacity and reduces the strength of swirling flow. There is a lack of comprehensive studies of the flow hydraulic aspects over the Daisy (Marguerite)–shape inlets. Thus more investigations are essential to study the effects of these intakes on flow hydraulic characteristics, changing the effective geometric parameters. In the present study, hydraulic characteristics of flow over the Daisy (Marguerite)–shape inlets are investigated based on model experimentation. The study subjects to investigate the effects of a cavity on the bottom of the blades of Daisy (Marguerite)–shape inlets, Namely Modern Daisy (Marguerite)–shape inlets, making the spillway to behave likewise the labyrinth weirs, on the hydraulic characteristics of flow and vortex formation. Experiments were performed in a galvanized cylindrical reservoir in which a circular shaft spillway has been attached over the reservoir bottom at the center for a wide range of geometric and hydraulic parameters of Modern Daisy (Marguerite)–shape entrances. Results show that among all the studied models, a model with an external length ratio of 3.41, an external height ratio of 1.14 and an internal width ratio of 0.32 have the best hydraulic performance. Finally, applying the statistical software, different correlations were derived for the threshold and critical submergence depths as well as the free and orifice flow discharge coefficients, with the highest correlation coefficient and the least error values. Keywords : Vertical shaft spillway; Swirling flow; Modern Daisy (Marguerite)–shape spillway, Threshold submergence depth; Critical submergence depth; Flow discharge coefficient.