Author(s): Hung Tao Shen; A. M. Wasantha Lal; P. Gunaratna
Linked Author(s): Hung Tao Shen
Keywords: No Keywords
Abstract: In this paper, a computer model is developed for simulating ice processes in rivers. In the river hydraulics component, the flow condition is determined by an implicit finite difference solution of one-dimensional unsteady flow equations. In the thermal component, distributions of water temperature and ice concentration are determined by a Lagrangian scheme for equations of transport of thermal energy and ice. The effect of surface ice on ice production as well as skim ice and shore ice formations are considered. The formation of ice cover is formulated according to existing equilibrium ice jam theories with due consideration to the interaction between the ice cover and the flow. The undercover ice accumulation is formulated according to the critical velocity criterion. The growth and decay of the ice cover is simulated using a finite-difference formulation applicable to composite ice covers consisting of snow, ice and frazil layers. The model has been applied to the St. Lawrence River and the Ohio River, with simulated results compared favorably with field observations.
Year: 1988