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Open AccessArticle

Experimental Analysis of Scour Features at Chevrons in Straight Channel

1
Department of Energy, Systems, Territory and Construction Engineering, University of Pisa, 56122 Pisa, Italy
2
Department of Civil and Environmental Engineering, Imperial College London, South Kensington, London SW7 2AZ, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Jihn-Sung Lai
Water 2021, 13(7), 971; https://doi.org/10.3390/w13070971
Received: 18 February 2021 / Revised: 15 March 2021 / Accepted: 31 March 2021 / Published: 1 April 2021
(This article belongs to the Special Issue Erosion Processes in Hydraulic Engineering)
Eco-friendly river restoration structures are used to create localized scour pools which serve as fish nurseries and promote biodiversity. In this category, chevrons are relatively new structures designed to maintain navigability in rivers. The scour hole formed in the wake region of chevrons can either act as a disposal site for dredged material or as a resting spot for different fish species. However, only few studies are present in the literature dealing with the scour mechanism due to chevrons. Therefore, this work aims to analyze the scour features at equilibrium, under different hydraulic conditions and transversal locations in a straight channel. Tests were conducted with both isolated and multiple chevrons in series arrangement. Scour morphology types were classified and their fields of existence were established as well. A detailed dimensional analysis was conducted, allowing us to identify the main parameters governing the scour phenomenon and derive a novel equivalent densimetric Froude number. Finally, empirical equations were developed to predict the maximum scour depth and length as well as the maximum dune height. View Full-Text
Keywords: chevron; hydraulics; physical model; river restoration; scour morphology chevron; hydraulics; physical model; river restoration; scour morphology
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MDPI and ACS Style

Roy, D.; Pagliara, S.; Palermo, M. Experimental Analysis of Scour Features at Chevrons in Straight Channel. Water 2021, 13, 971. https://doi.org/10.3390/w13070971

AMA Style

Roy D, Pagliara S, Palermo M. Experimental Analysis of Scour Features at Chevrons in Straight Channel. Water. 2021; 13(7):971. https://doi.org/10.3390/w13070971

Chicago/Turabian Style

Roy, Deep; Pagliara, Simone; Palermo, Michele. 2021. "Experimental Analysis of Scour Features at Chevrons in Straight Channel" Water 13, no. 7: 971. https://doi.org/10.3390/w13070971

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