By analyzing risk sources and those uncertain factors affecting the risk, the diversion risk is defined as the probability of the maximum discharge after being adjusted and held higher than the maximum design flood 通過對導(dǎo)流風(fēng)險來源和引起導(dǎo)流風(fēng)險的各種不確定性因素的論述和分析,把施工導(dǎo)流風(fēng)險定義為天然來(洪)水經(jīng)過調(diào)蓄后,導(dǎo)流泄水建筑物的最大泄水流量超過其設(shè)計最大泄水能力的概率。