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Overtopping is one of major factors of dam failure, and overtopping risk analysis is one important part of dam risk assessment. 摘要洪水漫頂是導(dǎo)致大垻潰垻的主要原因之一，大垻洪水漫頂風(fēng)險評估是大垻風(fēng)險評估的重要組成部分。