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The role of advection and stratification in wind-driven diffusion problems of Alpine lakes

Hutter, Kolumban and Wang, Yongqi (1998):
The role of advection and stratification in wind-driven diffusion problems of Alpine lakes.
In: Journal of Lake Sciences, pp. 447-475, 10, ISSN 1003-5427,
DOI: 10.18307/1998.sup46,
[Article]

Abstract

A numerical, high resolution integration technique is applied to the hydrodynamic equations on the rotating Earth to study tracer diffusion in homogeneous and stratified lakes. Spatially uniform wind shear is impulsively applied in the long direction of (i) a rectangular basin with constant depth and (ii) Lake Constance. Tracer mass is released at various locations of the free surface and its spreading under the action of diffusion and advection is studied. In homogeneous waters the tracer mass is quickly spread over the entire depth and inertial wave behaviour is discernable inn the concentration profiles; alternatively, for stratified waters the tracer mass is largely confined to that layer into which it is released with Kelvin and/or Poincare wave behaviour superimposed on it.

Item Type: Article
Erschienen: 1998
Creators: Hutter, Kolumban and Wang, Yongqi
Title: The role of advection and stratification in wind-driven diffusion problems of Alpine lakes
Language: English
Abstract:

A numerical, high resolution integration technique is applied to the hydrodynamic equations on the rotating Earth to study tracer diffusion in homogeneous and stratified lakes. Spatially uniform wind shear is impulsively applied in the long direction of (i) a rectangular basin with constant depth and (ii) Lake Constance. Tracer mass is released at various locations of the free surface and its spreading under the action of diffusion and advection is studied. In homogeneous waters the tracer mass is quickly spread over the entire depth and inertial wave behaviour is discernable inn the concentration profiles; alternatively, for stratified waters the tracer mass is largely confined to that layer into which it is released with Kelvin and/or Poincare wave behaviour superimposed on it.

Journal or Publication Title: Journal of Lake Sciences
Volume: 10
Uncontrolled Keywords: Tracer diffusion; lake circulation; limnology
Divisions: 16 Department of Mechanical Engineering > Fluid Dynamics (fdy)
16 Department of Mechanical Engineering
Date Deposited: 23 Aug 2011 14:49
DOI: 10.18307/1998.sup46
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