Scouring around the bridge pier during the flood events threatens the bridge as an important hydraulic structure. Thus, it is necessary to study and design economical and efficient scour-reduction deceives. The two major countermeasure techniques employed for minimizing local scour at bridge piers can be With measuring the velocities around the bridge pier, we found that in upstream of the pier, the stream-wise component of velocity becomes positive and for which the universal log-law turns out to be valid. Quadrant analysis is used to recognize the susceptible regions for sediment entrainment and deposition. By comparing depth-averaged values of the occurrence probabilities at upstream of the pier, it is found that the occurrence probability of sweep events is more than other events. In downstream of the pier each of the four bursting events contributes to sediment entrainment.
