河流防凌安全流量分析方法初步探讨

在不能改变河道边界条件和不利气候因素的前提下,通过防凌调度运用,调控河道上游来水量是缓解河道凌灾的重要手段。河流防凌安全流量是进行防凌调度的重要依据之一。通过分析河道凌情基本特点、有无灾害年份流量过程、探索冰凌形成和运动机理、采用理论方法分析河道冰下过流能力等多种方法,对河流的防凌安全流量分析方法进行了初步探索,分析确定的河流防凌安全流量可以作为防凌调度的基本依据。

Discussion on Method for Safety Flow of Ice-flood Prevention

In the condition without change of channel boundary condition and disadvantageous weather factors, the ice -flood prevention regulation and water volume control are important means of decreasing ice -flood disaster. Safety flow of ice -flood prevention is one of the most important bases for ice -flood prevention regulation. Some preliminary exploration on method of solving safety flow of ice prevention has been made, by analyzing the characteristics of ice -floods, comparing the flow processes in the disaster and non-disaster years, exploring the formation and motion mechanism of the ice, and studying the carrying capacity under river ice. The research result of safety flow can be used as basic foundation in ice -flood prevention regulation.