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Regular version of the site

Article

Estimates of the parameters of nonlinear internal waves in a stratified lake

Wulfenia. 2015. Vol. 22. No. 4. P. 7-16.
Pelinovsky E., Kurkina O. E., Kurkin A. A., Talipova T., Rouvinskaya E.

The characteristics of nonlinear internal waves in a shallow stratified lake are considered on the example of the Sankhar Lake (Vladimir region, Russia). It is shown that natural variations of temperature in the lake affect the kinematic characteristics of internal waves, especially the coefficient of the quadratic nonlinearity. The theoretical model based on the extended Korteweg–de Vries equation – the Gardner equation is used to estimate the characteristics of internal waves. It is shown that the first mode soliton is a wave of negative polarity. Its amplitude is less than 3 m (depth of the lake up to 15 m). Solitons of the second mode may be of any shape and polarity (compression or depression wave).