Experimental investigation of clear-water temporal scour variation around bridge pier in gravel

• Published in: Environmental fluid mechanics (Dordrecht, Netherlands : 2001) Vol. 18; no. 4; pp. 871 - 890
• Main Authors: Pandey, Manish, Sharma, P. K., Ahmad, Z., Singh, U. K.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01-08-2018; Springer Nature B.V
• Subjects: Agreements; Bridges; Classical Mechanics; Depth; Earth and Environmental Science; Earth Sciences; Environmental Physics; Gravel; Hydrogeology; Hydrology/Water Resources; Mathematical models; Methods; Oceanography; Original Article; Piers; Planes; Scour; Scouring; Water depth; Scour; Time-dependent scour depth; Circular bridge pier; Non-uniform sediment and gravel bed; Clear-water scour
• ISSN: 1567-7419; 1573-1510
• DOI: 10.1007/s10652-017-9570-8

Variation of temporal scour depth around circular piers under clear-water scour condition was studied experimentally for a variability of configuration studies, including different size of circular piers. A total of 96 experiments were carried out with more than 800 data sets of temporal scour depth in non-uniform gravel bed. The experimental data were used to calculate the temporal scour depth at different planes i.e. 0°, 90°, 180° and 270°, 0° plane indicates the maximum and 180° plane indicates minimum scour zones. Some of the previous methods of estimating temporal scour depth at 0° plane are studied in this study. Three temporal scour depths equations for 0°, 90°, 270° and 180° planes have been proposed in this study. The predictions of the temporal scour depth improved after the revised methods of Kothyari et al. (J Hydraul Eng 133(11):1229–1240,
2007
). Results of the present proposed equation for 0° plane were compared with latest available relationships in literature and found in good agreements with observed values.