, Volume 346, Issue 1–3, pp 119–128 | Cite as

Boundary-layers around bladed aquatic macrophytes

  • Craig L. StevensEmail author
  • Catriona L. Hurd


This paper describes a model of the diffusive boundary-layer around anaquatic macrophyte blade. Nutrient uptake at the base of the modelledboundary-layer was examined using previously published laboratory data. Theanalysis showed that, over the outer velocity range 0.01–0.16ms−1, nutrient uptake varied between that predicted byflat-plate boundary-layer theory and that expected with no mean advection. Aratio of theoretical and actual nutrient uptake rates was defined as a meansof categorising the transition between the two transport models. Themodelling was extended to show how fluctuating boundary conditions mayenhance nutrient uptake by the macrophyte; the scenario examined heresuggested that at otherwise low outer velocities, periodic stripping of theboundary-layer by passing waves increased nutrient uptake by a factor of 10.

boundary-layers nutrient uptake diffusion macrophyte kelp for submission to Hydrobiologia as a paper 


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Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  1. 1.Environmental Fluid Mechanics Group, Dept. of Civil EngineeringThe University of British ColumbiaCanada
  2. 2.BamfieldCanada
  3. 3.Dept. of OceanographyThe University of British ColumbiaCanada

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