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Ass. Lect. Ahmed Shawky Mohamed Awaad Mohamed Soliman :: Publications:

Title:
Minimizing Scour of Contraction Stepped Spillways
Authors: A. Shawky Awad, T. Hemdan Nasr-Allah, Y. Abdallah Mohamed and G. Mohamed Abdel-Aal
Year: 2018
Keywords: Stepped spillways; scour; breakers; openings and divergent angle.
Journal: Journal of Engineering Research and Reports
Volume: Not Available
Issue: Not Available
Pages: Not Available
Publisher: Not Available
Local/International: International
Paper Link: Not Available
Full paper Ahmed Shawky Mohamed Awaad Mohamed Soliman_Awad112018JERR41543.pdf
Supplementary materials Not Available
Abstract:

The scour downstream spillways can endanger the stability of the dams. Hence, determining the scour depth downstream of spillways was vital importance which scours holes formed around and near the foundations of spillways can endanger the stability of dams and may lead to their failure. So, this paper, investigate the scour downstream contraction stepped spillways. The experimental flume used 16.2 m length, 66 cm width and 65 cm depth. The used number of stepped spillways was 4 Sep, contraction ratio was 60% from flume width and the opening area in breaker 10% from the breaker area on all sides putting in down of breakers. The breaker used above the stepped spillway with different shapes of openings as rectangle, triangle and trapezoidal and different numbers by 2, 4, 6 and 8 of beakers. The divergent angle changes by 45º, 30º, 15ºand 10º. The results were showed that the best numbers of openings is 4openings with rectangle shape because it reduces the scour by 54.51%. In finally to improve this scour by divergent angle lead to the best angle is 10º can minimize the scour is 65.38%.

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