<p>It is often necessary to limit flow velocity near steep-sloped transition structures. For this purpose, chutes with increased roughness are used to effectively dissipate flow energy. However, the hydraulic design of rough chutes and the evaluation of the performance of various roughness types remain tasks yet to be accomplished. This study compares the available methods for designing rough chutes and discusses their applicability criteria. Theoretical predictions are compared with experimental data for roughness in the form of ribs perpendicular to the approaching flow</p>