南水北调中线干渠冰期输水冰情分析及冰害防治措施

Probable ice cases and methods of ice hazards prevention of China's Middle route South-to-North water transfer project in freezing period

南水北调中线总干渠跨越地理纬度大,由南向北气温逐渐降低,由气候温和区走向气候严寒区,沿程流量逐渐减少,流速降低,水深减小,沿岸多交叉建筑物,遇寒冷天气,不可避免地产生冰危害问题。在大量收集资料的基础上,分析了渠道冰期输水可能出现的冰情及其产生条件,并提出了运行过程中的冰害防治措施。

China＇s Middle route South-to-North water transfer project strides across large span of altitude, walking from mild climate area to freezing area, the temperature is lower and lower, along with the decrease of discharge、velocity、depth and all kinds of buildings across the channel, the Middle route channel will suffer from ice disaster inevitably. Based on magnanimous data, this paper demonstrates the necessary conditions for the appearance of ice cases in Hebei area along the route of South-to-North Channel, states probable ice cases of water delivery in freezing period and the creation conditions, analysis the ice cases along the route of South-to-North Channel, puts forward the corresponding measures for ice hazards prevention of South-to-North Channel in the process of running.