之所以要详细叙述一下这座大坝，是因为这次改造设计目的是使它能经受住达到设计震级的地震和巨大洪水漫顶。
The modification was due to the concern with adequacy of the dam when subjected to the design earthquake or overtopping by large floods.
任何时候，只要是在冰川下面的火山爆发，都会有可能发生冰岛人所说的jokulhlaups .基本上，这是一种由快速融化的冰川水形成的巨大洪水。
Anytime there's an eruption under a glacier there's a lot of potential for what Icelanders call a jokulhlaups. It's basically just a giant flood of water from a rapidly melting glacier.
公元前3000年的时候，有一个真实的阿特拉哈西斯曾经统治过苏美尔，并且他所统治的城市的废墟也显示了那时幼发拉底河曾经爆发过巨大洪水的迹象。
A real Atrahasis ruled in Sumeria around 3000 BC and the ruins of his city reveal signs of a gigantic flood of the Euphrates at about that time.
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