Volume 21, Issue 3 (Fall 2017)                   jwss 2017, 21(3): 243-253 | Back to browse issues page

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Jasemi zargani E, Kashefipour S M. Effect of the Flow and Geometric Parameters of Submerged Spur Dike on Riprap Stability. jwss 2017; 21 (3) :243-253
URL: http://jstnar.iut.ac.ir/article-1-2672-en.html
1. Dept. of Hydraulic Structure, College of Water Eng., Shahid Chamran Univ. of Ahvaz, Ahvaz, Iran. , e.jasemi@yahoo.com
Abstract:   (5244 Views)

Spur dikes are the most common hydraulic structures for river bank protection. Since the construction of this structure causes higher velocities around it, this structure is exposed to erosion. Riprap around the structure nose is one of the most common and economic way to protect spur dike. The main aim of this study is to investigate the riprap stability in a mild 90 degrees bend. Experiments were conducted in a laboratory flume with a 90 degree bend. After specifying the critical spur dike along the bend, this spur and one before and one after it were protected by riprap. The variables were the length of the structure, spur space, riprap size, Froude number, and the amount of submergence, and 205 experiments were carried out in this flume. Finally an experimental equation was developed based on the flow and geometric parameters of submerged spur dike, which can be applied for designing the riprap size. 

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Type of Study: Research | Subject: Ggeneral
Received: 2013/12/15 | Accepted: 2017/02/1 | Published: 2017/11/12

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