工程坝前年最高水位Hm的频率可以表征工程潜在的洪水风险。在洪水过程线概化为三角形基础之上，推导出最高水位Hm和洪峰x，洪量y的定量关系式。借助概化关系式，以随机模拟法推求符合防洪标准的年最高水位(Hm)N。在此基础上分析了符合达标要求下洪峰x和洪量y的匹配情况，并明确指出，当前广泛应用的同频率洪峰x和洪量y为一组特殊匹配，其防洪计算结果超标，研究表明，工程防洪特性的改变对Hm有影响，且以上主要内容均有实例分析论证。
Abstract
Engineering potential destruction risk caused by flood can be presented by the frequency of annual highest stages in front of engineering (Hm). A quantificational relational expression among annual highest stages，flood peak discharge (x) and flood volume (y) was established, which was based on the condition that flood hydrograph was generalized into triangle. And then, based on stochastic simulation method, the annual highest stages (Hm)N were calculated according with flood prevention standard. Therewith, the combinations of flood peak discharge and flood volume are analysed at the request of satisfying the standard. Result has shown that its calculation was above the flood prevention standard on the condition of the combination that flood peak discharge and flood volume are same frequency, in addition, The variation of engineering’s characters of flood prevention have impact on Hm, which above can be demonstrated.
关键词
防洪标准 /
概化洪水过程线 /
随机模拟 /
峰量匹配
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Key words
flood prevention standard /
generalized flood hydrograph /
stochastic simulation /
combination of flood peak discharge ( x) and
flood volume ( y)
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基金
国家重点研发计划资助项目“枢纽暴雨洪水预报及应急
调控技术”( 2016YFC0401903)
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