Predicting the scour depth downstream single step broad crested weirs

The main purpose of broad crested weir used in open channels is to raise and control upstream (U/S) water level. The most important problems for downstream of hydraulic structures are the local scour formed at the downstream of hydraulic structures. Scour control process considered as the main objec...

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Bibliographic Details
Published in:Journal of physics. Conference series 2021-08, Vol.1973 (1), p.12160
Main Authors: Suleiman, Saleh J., Ismael, Adnan A.
Format: Article
Language:English
Subjects:
Broad crested weir
Broad-crested weirs
Hydraulic structures
Hydraulics
Local scour
Open channels
Scour reduction
Scouring
Velocity distribution
Water levels
Weir
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Summary:The main purpose of broad crested weir used in open channels is to raise and control upstream (U/S) water level. The most important problems for downstream of hydraulic structures are the local scour formed at the downstream of hydraulic structures. Scour control process considered as the main objective to ensure safety and economical design of hydraulic structures to prevent any serious failure in the future. In this study, four models of Single-Step-Broad-Crested weirs with different angles were tested under different flow intensity for duration of 6 hours. Acoustic Doppler Velocimeter (ADV) was used to investigate the velocity field. The results showed that, the model C reduces local scour hole volume was about 87.6%, 55.58% and 44.8% and the maximum depth of scour reduced 73.43%, 32.56% and 24.22% as compared with model D at each discharge.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1973/1/012160