<p>Submerged vanes can be used to deflect sediments transverse to the flow and thus have ability to develop inland navigation fairway. This work investigates how utilising macro roughness and tapering angle on the leading edge of submerged vanes affects the lift force that enhances the variation in riverbed morphology. The effects of tapering on the flow field are studied numerically by FLOW- 3D Hydro software, while the leveraging impacts on river bed dredging are investigated experimentally. Further, the effectiveness of the vanes was tested for two different arrangements such as pair arrangement and array arrangement. When tapered submerged vanes are leveraged by adding macro roughness to the pressure zone and employed at a high angle of attack, a strong leading edge vortex (LEV) is formed. This enhances the maximum lift coefficient that the submerged vanes can produce, and it plays a crucial role in maximizing the productivity of dredging river beds. Results showed that the highest strength of LEV was seen while employing an array of 18° tapered submerged vanes oriented at 40° angle of attack. Tapering angle of 18° exhibits an 8.6% higher moment of momentum (M.O.M) in the near-bed region compared to the tapering angle of 33.7°. Additionally, presence of macro roughness inside the pressure zone further strengthens the LEV. Consequently, this configuration holds potential to enhance the development of inland navigation fairways.</p>