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:: Volume 12, Issue 43 (12-2018) ::
jwmseir 2018, 12(43): 61-69 Back to browse issues page
Experimental Investigation of Impact of Radial Deflecting Arrangement of Permeable Groyns on Maximum Scour Rate of Nose
Fateme Maleki , Saeed Abbasi *
Abstract:   (4681 Views)
Groyns are some structures which are constructed in flow path to protect the river bank. One of the most significant challenges in groyns operation is production of scour hole at the nose. In this study; new arrangement is proposed for permeable groyns and effect of this arrangement on maximum depth of scour hole at the nose of the groyn is investigated experimentally. Amount of permeability for the groyn is selected to be 40%, 60% and 80% and the experiments were performed in clear water. The Froude number is considered to be constant in all experiments and the depth of scour hole was measured with laser meter with an accuracy of 1 mm. Impact of number of groyns in each permeability was investigated as well. Then behavior of groyns because of change of permeability and also maximum depth of produced scour hole in the situation of nose of groyn with various numbers of bars was compared. Scrutiny of experiments show that between performed experiments for groyn with radial deflecting arrangement, the scour hole depth is minimum on permeability of 80% and groyn with seven bars.
Keywords: Scouring, Radial permeable groyne, Scouring pattern, Scouring control, Experimental model
Full-Text [PDF 977 kb]   (11 Downloads)    
Type of Study: Research | Subject: Special
Received: 2017/09/19 | Accepted: 2018/07/15 | Published: 2019/11/4
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Maleki F, Abbasi S. Experimental Investigation of Impact of Radial Deflecting Arrangement of Permeable Groyns on Maximum Scour Rate of Nose. jwmseir 2018; 12 (43) :61-69
URL: http://jwmsei.ir/article-1-756-en.html


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Volume 12, Issue 43 (12-2018) Back to browse issues page
مجله علوم ومهندسی آبخیزداری ایران Iranian Journal of Watershed Management Science and Engineering
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