Experimental study of flows over Block Ramps on stability of non-cohesive beds

Block ramps are ecofriendly drop structures, which ensure more stability in the downstream riverbed. The scouring stilling basin bed material generated by rapidly varied flow transition affects of ramp structure. In present study, a modified configuration is tested along with uniform conventional arrangements to check non-cohesive beds block ramps. Uniform horizontal configurations and sill arrangement for varying slopes (20% ≤ i ≥ 30%). critical particle densimetric Froude number (Fc*) selected as criteria predict hydraulic conditions incipient sediment motion it compared established literature formulations estimate under macroroughness conditions. Scour volumes from each experimental run quantified intensity determined related number. findings paper also describe effect Fc* on dimensionless scour depth. Spatial shift maximum depth formation toe flows over has been observed. Experimental observations comparison results show gradation pronounced non-uniform configuration, effectively reduce henceforth stabilizes upstream structure relative selected.