Author(s): Patrik Andreasson; Lars Hammar; Hung Tao Shen
Linked Author(s): Hung Tao Shen
Keywords: No Keywords
Abstract: Surface turbulence is an important factor influencing the formation of ice pans in rivers. Turbulent eddies are active in resuspending smaller ice particles that may emerge on the free surface. It is also expected that the shape and size of ice pans are related to turbulence at the free surface. However, no systematic observations of, or theoretical approaches to, surface turbulence in relation to ice pan formation exist to the authors knowledge. In this paper a first attempt is made to relate floating ice particles such as ice pans, to the turbulence field that might be expected at the free surface of a river. With the aid of an assumed spectral distribution of turbulent eddy-sizes, analytic expressions for relevant ice particle sizes (i. e. for flocs, pans, floes, etc. ) are derived. In the analysis several different stages are indicated in the process of ice pan formation.
Year: 1998