Abstract: Technical note discusses a detailed approach to dimensional analysis for the bridge pier scour phenomenon and the introduction of flow intensity. It demonstrates the dependence of critical upstream velocity on the rest of ...

Abstract: A new methodology for the experimental analysis of the equilibrium scour depth at bridge piers is introduced and validated for clear-water conditions. The proposed experimental methodology determines the flow conditions ...

Abstract: This work presents results on riprap sizing for pile group protection against local scour. Shear failure mechanism is addressed, avoiding edge, bed-form undermining, and winnowing modes. The influences of the flow conditions ...

Abstract: A new instrument built to directly measure the bottom shear stress under different conditions of periodic waves is presented. Similar to classical Taylor’s cylindrical viscosimeter, the instrument is formed by two concentric ...

Abstract: The present study focuses on riprap protection at single piers under live-bed conditions. The riprap mattress is displayed so that its top is leveled with the surrounding river bed, for ease in the construction process. ...

Abstract: Properly modeling the sediment transport under water waves is critical to understanding morphodynamic processes such as, e.g., sandbar migration at beaches. In the last two decades, the influence of the wave asymmetries ...

Abstract: An approach for calculating turbulent flows in a wave-current boundary layer over a slowly varying bed is presented. Waves are periodic in time with several harmonics. In this paper, we adopt a time invariant eddy viscosity ...

Abstract: In this paper we experimentally investigate the final scour depth around cylindrical piers under flood waves. Only clear-water conditions are considered. An approach to estimate the final scour depth under a flood wave is ...