Abstract: By conceptual flume experiments,the longitudinal,lateral and vertical time-average velocity and lateral distribution of turbulent intensity around a!pier are presented by using a Micro Acoustic-Doppler Velocimeter(MicroADV) to measure the instantaneous velocity.Comparison of time-average velocity and lateral distribution of turbulent intensity with and without piers is carried out,influences of the pier on time-average velocity and turbulent intensity are presented,turbulent width at the edge of a pier and the relationship between the maximum width of turbulent and mean velocity in section are also presented.