Nonlinear Internal Waves in Lakes

1. Front Matter

   Pages i-xv

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2. Internal Waves in Lakes: Generation, Transformation, Meromixis – An Attempt at a Historical Perspective

   • K. Hutter

   Pages 1-22

3. Field Studies of Non-Linear Internal Waves in Lakes on the Globe

   • N. Filatov, A. Terzevik, R. Zdorovennov, V. Vlasenko, N. Stashchuk, K. Hutter

   Pages 23-103

4. Laboratory Modeling on Transformation of Large-Amplitude Internal Waves by Topographic Obstructions

   • N. Gorogedtska, V. Nikishov, K. Hutter

   Pages 105-191

5. Numerical Simulations of the Nonhydrostatic Transformation of Basin-Scale Internal Gravity Waves and Wave-Enhanced Meromixis in Lakes

   • V. Maderich, I. Brovchenko, K. Terletska, K. Hutter

   Pages 193-276

6. Back Matter

   Pages 277-277

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Internal wave dynamics in lakes (and oceans) is an important physical component of geophysical fluid mechanics of ‘quiescent’ water bodies of the Globe. The formation of internal waves requires seasonal stratification of the water bodies and generation by (primarily) wind forces. Because they propagate in basins of variable depth, a generated wave field often experiences transformation from large basin-wide scales to smaller scales. As long as this fission is hydrodynamically stable, nothing dramatic will happen. However, if vertical density gradients and shearing of the horizontal currents in the metalimnion combine to a Richardson number sufficiently small (< ¼), the light epilimnion water mixes with the water of the hypolimnion, giving rise to vertical diffusion of substances into lower depths. This meromixis is chiefly responsible for the ventilation of the deeper waters and the homogenization of the water through the lake depth. These processes are mainly formed as a result of the physical conditions, but they play biologically an important role in the trophicational state of the lake.

• Wave dynamics
• fluid mechanics
• meromixis
• nonlinear waves
• marine and freshwater sciences

• c/ Versuchsanstalt für Wasserbau, Hydrologie und Glaziologie, ETH Zürich, Zürich, Switzerland

  Kolumban Hutter

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