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Water Resources

, Volume 41, Issue 5, pp 512–521 | Cite as

A mathematical model of channel deformations in permafrost zone rivers

  • E. I. Debol’skayaEmail author
Hydrophysical Processes

Abstract

A mathematical model is presented, allowing the calculation of channel deformations of permafrost zone rivers caused by thermo-erosional niching under the effect of waves of different origin under the conditions of growing ambient temperature. The model is based on equations of transient fluid motion in two-dimensional formulation, Stefan equation for determining the displacement of water-ice phase transition interface, and mass conservation equations for transported sediments (deformation equations). The model was tested against a particular case of steady flow based on data of a laboratory experiment. Numerical experiments revealed the key factors of the process and allowed the impact of waves with different duration and intensity (spring floods and releases from engineering structures) on river channel to be analyzed.

Keywords

channel deformations melting waves mathematical modeling 

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Copyright information

© Pleiades Publishing, Ltd. 2014

Authors and Affiliations

  1. 1.Water Problems InstituteRussian Academy of SciencesMoscowRussia

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