Analysis of the formula for ice discharge under ice cover

Ice discharge under ice jam or ice cover is the result from the combined effects of the thermal, hydraulic and boundary conditions.Based on the analysis of the experimental data, the formula for calculating ice discharge is proposed.Meanwhile, compared with the data of stability freezing period from Hequ region in the Yellow River, the result shows that the proposed form of formula is rational and can offer reference to the calculation of ice discharge in the during freeze-up.