天气预报 > 其他 > 河水结冰从边上还是从中间开始
河水结冰从边上还是从中间开始
更新时间: 2020-08-16 00:00:00  

解释:在河流中,每部分的流速都有不同,靠岸的速度要低,水会渗到岸边的土里,水不会继续流动,低温情况下结冰。接触到冰的水,容易结冰,靠岸处的冰会越来越多, 天气寒冷,水的热量被大地和空气夺走,水表面更易结冰,流动的水,边上开始结冰,并逐渐由水面延伸到河流中央。 随着岸边和河流表面的冰越来越厚,导致河流越来越细,导致流速下降,甚至断流,动水开始变成静水,最终彻底冰封。

关键词: 河水 结冰 边上 还是 中间 开始

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