Scouring depth around arch spur dike at river banks

Publisher:
CRC press
Publication Type:
Conference Proceeding
Citation:
Fluvial hydraulics, 2012, pp. 689 - 691
Issue Date:
2012-01
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Spur dikes are structures, which are normally designed to prevent river banks from scouring. In this study, three sequential spur dikes with zero height above the bed were installed at one side of an experimental flume with a rectangular cross-section. The top of spur dikes was set at same level as the bed level. Sequential spur dikes were tested with four different spaces. The bed of the flume was covered with sand particles of median particle size (D50) equals to 0.85 mm. The experimental tests were carried out under different flow conditions and after achieving equilibrium bed scouring condition, the topography of the bed was measured. The velocity of flow at some points was measured using Acoustic Velocimeter (Micro-ADV). According to the results, it was found that the maximum scouring depth varies significantly with the spacing. Additionally, three regression equations were suggested here to determine maximum scouring depth around first, second and third spur dikes. The above findings can be a useful guideline for design of scouring protections in river training works.
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