The efficiency of perforated screens with square shape openings in dissipating the energy of supercritical flows was investigated in the present study through laboratory experiments. Perforated screens with a porosity of 45% were used and were placed at an angle α (45°, 75°, 90º, 120º, and 135º) with the upstream direction of supercritical flow during the experiments. Furthermore, the screens were employed in single and double layers for each of the angle positions. The two screens were spaced 2.5 cm apart in the case of the double layer. When the supercritical flow strikes the screen, it caused a hydraulic jump just upstream of the screen. The Froude number, F1, was varied from 3 to 19.5 when the supercritical flow collides with upstream of the screen. The relative energy loss between the upstream section 1 and downstream section 2 of the screen was much greater than the classical hydraulic jumps. Furthermore, it was observed non-linearly variation between the relative energy loss with respect to F1, but with respect to the angle α this variation is minor.