esmaeli, P., Boudaghpour, S., Mirzaee, M. (2021). Experimental study of the flow pattern around simple series spur dikes in meandering channel with erodible sloping wall. , 13(2), 355-367. doi: 10.22092/ijwmse.2020.127612.1711
pedram esmaeli; siamak Boudaghpour; mehdi Mirzaee. "Experimental study of the flow pattern around simple series spur dikes in meandering channel with erodible sloping wall". , 13, 2, 2021, 355-367. doi: 10.22092/ijwmse.2020.127612.1711
esmaeli, P., Boudaghpour, S., Mirzaee, M. (2021). 'Experimental study of the flow pattern around simple series spur dikes in meandering channel with erodible sloping wall', , 13(2), pp. 355-367. doi: 10.22092/ijwmse.2020.127612.1711
esmaeli, P., Boudaghpour, S., Mirzaee, M. Experimental study of the flow pattern around simple series spur dikes in meandering channel with erodible sloping wall. , 2021; 13(2): 355-367. doi: 10.22092/ijwmse.2020.127612.1711

Experimental study of the flow pattern around simple series spur dikes in meandering channel with erodible sloping wall

مهندسی و مدیریت آبخیز
Article 9, Volume 13, Issue 2, July 2021, Pages 355-367    PDF (1.83 M)
Document Type: Research Paper
DOI: 10.22092/ijwmse.2020.127612.1711
Authors
pedram esmaeli1; siamak Boudaghpour2; mehdi Mirzaee3
1PhD Student Civil Engineering water, South Tehran Branch, Islamic Azad University, Tehran, Iran,
2Assistant Professor, K.N. Toosi University of Technology, Tehran, Iran
3Assistant Professor, Central Tehran Branch, Azad University, Tehran, Iran
Abstract
The spur dike has been known as one of the most common organizing constructs of the river to reduce the erosion of coasts and river banks. These structures are developed with the right lengths and angles towards the flow of the natural walls of the river that cause flow deviation from the sides and lead it toward the central river axis. In this experimental study, the flow pattern around the simple series spur dike in the meandering channel with a sloped erodible wall consisting of three consecutive arches with angles of 45, 90 and 45 degrees, has been studied for 40, 35 and 30 liter/sec rates. The results indicate that the collision position of the first line of flow in the near bed to the inner wall of bend no. 2 in discharge 40 liters per second earlier than discharge 35 liters per second and in discharge 35 liters per second earlier than the discharge 30 liter per second. So that the collision position of the first line of flow in the near bed to the inner wall of bend no. 2 in discharge, 40, 35 and 30 liters per second, respectively, in the -18, -15 and -10 degree sections compared to the central arc of the mentioned bend. In conditions of the presence of spur dikes, the vortex dimensions change with the depth of movement, so that moving towards the surface of the water in a fixed discharge, due to the tendency of flow to the outer wall, the slope of the bend wall and increasing the level of contact surface of the spur dike length, the vortex dimensions are increased.
Keywords
Bank erosion; Bend channel; Experimental investigation; Secondary flow; Series spur dikes
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