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Geosciences 2018, 8(7), 259;

Vegetated Channel Flows: Turbulence Anisotropy at Flow–Rigid Canopy Interface

Department of Civil, Architectural and Environmental Engineering (DICEA), University of Naples Federico II (UNINA), 80125 Napoli NA, Italy
Department of Engineering (DING), University of Sannio (UNISANNIO), 82100 Benevento BN, Italy
Author to whom correspondence should be addressed.
Received: 19 June 2018 / Revised: 2 July 2018 / Accepted: 6 July 2018 / Published: 11 July 2018
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This laboratory study aimed at investigating the mean and turbulent characteristics of a densely vegetated flow by testing four different submergence ratios. The channel bed was covered by a uniform array of aligned metallic cylinders modeling rigid submerged vegetation. Instantaneous velocities, acquired with a three-component acoustic Doppler velocimeter (ADV), were used to analyze the mean and turbulent flow structure. The heterogeneity of the flow field was described by the distributions of mean velocities, turbulent intensities, skewness, kurtosis, Reynolds stresses, and Eulerian integral scales. The exchange processes at the flow–vegetation interface were explored by applying the turbulence triangle technique, a far less common technique for vegetated flows based on the invariant maps of the anisotropic Reynolds stress tensor. View Full-Text
Keywords: vegetated flow; rigid cylinders; ADV; turbulence; anisotropy; invariant maps vegetated flow; rigid cylinders; ADV; turbulence; anisotropy; invariant maps

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Caroppi, G.; Gualtieri, P.; Fontana, N.; Giugni, M. Vegetated Channel Flows: Turbulence Anisotropy at Flow–Rigid Canopy Interface. Geosciences 2018, 8, 259.

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