ABSTRACT
This chapter presents a technique for turbulence measurement for clear water scour tests having different shaped piers under different pier widths, densimetric Froude number, inflow depth and pier Reynolds number on a sand bed. Many researchers have conducted various studies to determine the velocity profiles during scour. The horseshoe vortex also pushes the maximum downflow velocity within the scour hole closer to the pier. The discontinuity in the velocity profile from flow to wake leads to the development of concentrated vortices in the interface, the cast-off vortices, which translate with the flow. A sample refers to the collection of several pings to produce a mean estimate of the water velocity. The volume of water in which the Acoustic Doppler Velocimeter (ADV) makes velocity measurements is known as sampling volume. The ADV operates on a pulseto-pulse coherent Doppler shift to provide instantaneous three-dimensional velocity components at a sampling rate of 100 Hz.
