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McGinnis et al. 2004
McGinnis, D.F., Lorke, A., Wüest, A., Stöckli, A. and Little, J.C. (2004). Interaction between a bubble plume and the near field in a stratified lake. Water Resources Research 40: doi: 10.1029/2004WR003038. issn: 0043-1397.

A steady state bubble-plume model is evaluated using full-scale temperature, salinity, and dissolved oxygen data collected in a Swiss lake. The data revealed a plume-generated near-field environment that differed significantly from the ambient far-field water column properties. A near-field torus of reduced stratification developed around the plume, the extent of which is on the same lateral scale as the horizontal dislocations generated by persistent first-mode seiching. The plume fallback water was found to penetrate much deeper than expected, thereby maintaining reduced vertical gradients in the near-field torus. The plume entrains a portion of the fallback water leading to short-circuiting, which generates a complex plume-lake interaction and reduces far-field downwelling relative to the upward plume flow. As the integral plume model incorporates the entrainment hypothesis, it is highly sensitive to the near-field environmental conditions. After identifying appropriate near-field boundary conditions the plume model predictions agree well with the field observations.

BACKGROUND DATA FILES

Abstract

Keywords
Oceanography, Physical, Turbulence, diffusion, and mixing processes, Hydrology, Limnology, Hydrology, Reservoirs (surface), Hydrology, Surface water quality, aeration, bubble plume, buoyancy, hypolimnion, oxygen transfer, reservoir
Journal
Water Resources Research
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Publisher
American Geophysical Union
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