Document Type

Thesis - University Access Only

Award Date


Degree Name

Master of Science (MS)

Department / School

Civil and Environmental Engineering


Flow field measurement with Particle Image Velocirnetry (PIV) is a new measurement technique, which gives one non-intrusive, qualitative and quantitative velocity measurements of the flow field. The bow wave is a result of the pier acting as an obstruction to the flow. In this study, the relationship between the water surface profile around a 60-mm diameter circular pier and the Froude number and relative water depth was examined. Open channel PIV flow field measurements were taken around the pier on a smooth bed, focusing on the flow in front and on the side of the pier. The Froude number was in the range of 0.1 to 0.8 and the relative water depth, y1/D, was in the range of 1.0 to 3.0. Velocity vector measurements were taken at two horizontal planes, at a height of9.3-mm and 41-mm from the bed. The approach flow velocity and water depth were varied to show the effects of flow parameters on the flow pattern around the pier. The PIV measurements were compared with the Potential Flow Solution and point measurements from Ahmed and Rajaratnam (1998) and Melville and Raudkivi (1977).

Library of Congress Subject Headings

Bridges -- Foundations and piers Streamflow velocity Particle image velocimetry Scour at bridges



Number of Pages



South Dakota State University