NDLI: Stratified flow interactions with a suspended canopy

Content Provider	Springer Nature Link
Author	Plew, David R. Spigel, Robert H. Stevens, Craig L. kes, Roger I. Davidson, Mark J.
Copyright Year	2006
Abstract	Field observations of the interactions between a stratified flow and a canopy suspended from the free surface above a solid boundary are described and analysed. Data were recorded in and around the canopy formed by a large long-line mussel farm. The canopy causes a partial blockage of the water flow, reducing velocities in the upper water column. Deceleration of the approaching flow results in a deepening of isopycnals upstream of the canopy. Energy considerations show that the potential for an approaching stratified flow to be diverted beneath a porous canopy is indicated by a densimetric Froude number. Strong stratification or low-velocities inhibit vertical diversion beneath the canopy, instead favouring a horizontal diversion around the sides. The effect on vertical mixing is also considered with a shear layer generated beneath the canopy and turbulence generated from drag within the canopy. In the observations, stratification is shown to be of sufficient strength to limit the effectiveness of the first mixing process, while the turbulence within the canopy is likely to enhance vertical exchange. Velocity and temperature microstructure measurements are used to investigate the effect of the canopy on turbulent dissipation and show that dissipation is enhanced within the canopy.
Starting Page	519
Ending Page	539
Page Count	21
File Format	PDF
ISSN	15677419
Journal	Environmental Fluid Mechanics
Volume Number	6
Issue Number	6
e-ISSN	15731510
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-10-17
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Canopy Mixing Stratification Stratified flow Turbulence Drag Aquaculture Oceanography Meteorology/Climatology Hydrogeology Mechanics Environmental Physics
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Water Science and Technology

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