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首页> 外文期刊>Geosciences >Impact of the Rainfall Duration and Temporal Rainfall Distribution Defined Using the Huff Curves on the Hydraulic Flood Modelling Results
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Impact of the Rainfall Duration and Temporal Rainfall Distribution Defined Using the Huff Curves on the Hydraulic Flood Modelling Results

机译：使用霍夫曲线定义的降雨持续时间和时间降雨分布对水力洪水模拟结果的影响

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In the case of ungauged catchments, different procedures can be used to derive the design hydrograph and design peak discharge, which are crucial input data for the design of different hydrotechnical engineering structures, or the production of flood hazard maps. One of the possible approaches involves using a hydrological model where one can calculate the design hydrograph through the design of a rainfall event. This study investigates the impact of the design rainfall on the combined one-dimensional/two-dimensional (1D/2D) hydraulic modelling results. The Glin??ica Stream catchment located in Slovenia (central Europe) is used as a case study. Ten different design rainfall events were compared for 10 and 100-year return periods, where we used Huff curves for the design rainfall event definition. The results indicate that the selection of the design rainfall event should be regarded as an important step, since the hydraulic modelling results for different scenarios differ significantly. In the presented experimental case study, the maximum flooded area extent was twice as large as the minimum one, and the maximum water velocity over flooded areas was more than 10 times larger than the minimum one. This can lead to the production of very different flood hazard maps, and consequently planning very different flood protection schemes.
机译：在没有集水区的情况下，可以使用不同的程序得出设计水位图和设计峰值流量，这对于设计不同的水力工程结构或洪水灾害图是至关重要的输入数据。一种可能的方法涉及使用水文模型，其中可以通过降雨事件的设计来计算设计水文。这项研究调查了设计降雨对一维/二维（1D / 2D）水力模型组合结果的影响。案例研究位于斯洛文尼亚（中欧）的Glin ?? ica流域。比较了10年和100年回报期的10个不同的设计降雨事件，其中我们使用Huff曲线定义了设计降雨事件。结果表明，设计降雨事件的选择应被视为重要步骤，因为不同情况下的水力模拟结果差异很大。在提出的实验案例研究中，最大洪水面积是最小洪水面积的两倍，最大洪水速度是最小洪水面积的十倍以上。这可能导致产生非常不同的洪水灾害图，并因此制定出非常不同的防洪计划。

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