现今水坝的数量,高度和长度都在稳步上升,因而提出了更高的技术要求。一个水坝的破坏往往导致很大的灾难,并伴随着生命财产的重大损失。因而坝工建设者十分注意坝的安全,并把安全因素置于经济因素之上。从坝的失事情况来看,在本世纪初失事率最高,近年来由于筑坝技术的提高,失事率明显下降。下表列出了各种原因水坝失事的数 Nowadays, the number, height and length of dams are all steadily rising, thus putting forward higher technical requirements. The destruction of a dam often leads to great disasters, accompanied by heavy losses of life and property. Therefore dam construction workers pay great attention to the safety of the dam, and place the safety factor above the economic factor. From the dam’s accident situation, the highest rate of incidents in the early of this century, due to the improvement of damming technology in recent years, the crash rate dropped significantly. The following table lists the number of dam failures for various reasons