ABSTRACT
The purpose of the historic data is to be used for data analysis and some parameters determination of the ice flood modelling. Ice regime information observation and forecasting is the most important scientific supporting measures for ice flood control, reservoir regulation and decision making. Tracking ice formation from observations and combining them with numerical model predictions for advanced warning requires proper understanding of all scientific issues that play a role. Ice regime is the result of comprehensive influences of temperature, water situation, channel condition and human activities. In the ice flood period, the operation of the reservoir, do not only adjust the discharges on the downstream, but also the releases have higher water temperature and as such increases the water temperature of the downstream river reach, impacting the flow thermal condition. One of the key factors to illustrate the river thermal conditions is water temperature.
