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Article

Investigating the Performance of Enhanced Permeable Groins in Series

1
Department of Civil Engineering, Islamic Azad University Miandoab Branch, Miandoab 5936159351, Iran
2
Department of Water Structures, Shahid Chamran University of Ahvaz, Ahvaz 6135783151, Iran
3
Department of Earth and Marine Science, University of Palermo, Via Archirafi 20, 90128 Palermo, Italy
*
Author to whom correspondence should be addressed.
Water 2020, 12(12), 3531; https://doi.org/10.3390/w12123531
Received: 8 November 2020 / Revised: 6 December 2020 / Accepted: 11 December 2020 / Published: 16 December 2020
(This article belongs to the Section Hydraulics and Hydrodynamics)
The enhanced permeable groin is a novel eco-friendly and cost-effective technique for bank protection and restoration of meander bends. The behavior of bed deformations due to the distance between the structures has to be studied to design enhanced permeable groins in series properly. In this study, scour morphologies around enhanced permeable groins in series, characterized by four different distances and located in a 180° mild flume bend, for clear water conditions were investigated. The analysis indicated that scour geometrical patterns such as the maximum scour depth nearby the structures and the maximum deposition height between them are strongly affected by the distance between the groins. The results revealed that the maximum scour depth around the structures increases with the distance between structures, the scour holes develop towards the outer bank and create a series of pools that can lead to the bank collapse. All experiments, carried out with different structure distances, demonstrated that the location of thalweg effectively shifted towards the middle of the channel and near the inner bank for high and low particle Froude numbers, respectively. As a general result, a distance between enhanced permeable groins equal to four times the effective length of the structure is recommended for a 180° mild flume bend for the investigated particle Froude numbers. Finally, a general design guideline is presented to a proper design of enhanced permeable groins in series. View Full-Text
Keywords: river bend; river restoration; scour; bank protection; enhanced permeable groin river bend; river restoration; scour; bank protection; enhanced permeable groin
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MDPI and ACS Style

Shokrian Hajibehzad, M.; Shafai Bejestan, M.; Ferro, V. Investigating the Performance of Enhanced Permeable Groins in Series. Water 2020, 12, 3531. https://doi.org/10.3390/w12123531

AMA Style

Shokrian Hajibehzad M, Shafai Bejestan M, Ferro V. Investigating the Performance of Enhanced Permeable Groins in Series. Water. 2020; 12(12):3531. https://doi.org/10.3390/w12123531

Chicago/Turabian Style

Shokrian Hajibehzad, Manoochehr, Mahmood Shafai Bejestan, and Vito Ferro. 2020. "Investigating the Performance of Enhanced Permeable Groins in Series" Water 12, no. 12: 3531. https://doi.org/10.3390/w12123531

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