中文摘要：

对于北方地区的明渠输水工程来说，当冬季气温降低或春季气温回升时，明渠中会产生大量的流冰，在合适的水力条件下，流冰相互堆积形成冰塞，轻则降低渠道的输水能力，重则引发事故。研究了基于虚拟流动法的输水明渠冰水动力学数学模型，解决了冰盖动态发展的计算问题，并对典型输水明渠冰情动态发展的过程进行了模拟、分析。

英文摘要：

In North China,the continuous decrease in air temperature in Winter or increase in Spring may lead to the formation of surface ice in the canal. Under suitable hydraulic conditions, the incoming surface ice will accumulate at its upstream side and extend the ice cover upstream or forms ice jam which would decrease the discharge capacity or lead to accident. This paper studies on a fictitious method to calculate dynamic ice cover processes and uses this method to simulate ice processes for typical canal.