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The Role Of Historic Flood Data In Estimating Extreme Floods

机译:历史洪水数据在估计特大洪水中的作用

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摘要

In spite of the advances in runoff modelling and the collection of riverflow records over several decades, estimates of very rare (>200 years) flood events remain very uncertain. The uncertainty can be reduced by the use of historic flood records. These are gathered from newspaper reports, photographs, and other accounts which allow the estimation of the peak discharge and sometimes the volume of floodwater. At three sites in the UK (Brue, Avon, and Till river catchments) the estimates of extreme floods based on historic records exceed those from short term records and the results from the Flood Estimation Handbook (FEH). The results will be useful for engineers planning flood control schemes, and in estimating spillway design floods.
机译:尽管数十年来径流模型的发展和河水记录的收集,但对非常罕见(> 200年)洪水事件的估计仍非常不确定。可以通过使用历史洪水记录来减少不确定性。这些是从报纸的报告,照片和其他帐目中收集的,这些帐目可以估算高峰流量,有时还可以估算洪水量。在英国的三个地点(布劳,雅芳和蒂尔河流域),基于历史记录的极端洪灾估计值超过了短期记录和《洪灾估计手册》(FEH)得出的结果。该结果对于工程师计划防洪计划以及估算溢洪道设计洪水将很有用。

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