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首页> 外文期刊>International Journal of Environmental Research and Public Health >Assessment of Vulnerability to Extreme Flash Floods in Design Storms
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Assessment of Vulnerability to Extreme Flash Floods in Design Storms

机译：评估设计风暴中极端山洪的脆弱性

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摘要

There has been an increase in the occurrence of sudden local flooding of great volume and short duration caused by heavy or excessive rainfall intensity over a small area, which presents the greatest potential danger threat to the natural environment, human life, public health and property, etc. Such flash floods have rapid runoff and debris flow that rises quickly with little or no advance warning to prevent flood damage. This study develops a flash flood index through the average of the same scale relative severity factors quantifying characteristics of hydrographs generated from a rainfall-runoff model for the long-term observed rainfall data in a small ungauged study basin, and presents regression equations between rainfall characteristics and the flash flood index. The aim of this study is to develop flash flood index-duration-frequency relation curves by combining the rainfall intensity-duration-frequency relation and the flash flood index from probability rainfall data in order to evaluate vulnerability to extreme flash floods in design storms. This study is an initial effort to quantify the flash flood severity of design storms for both existing and planned flood control facilities to cope with residual flood risks due to extreme flash floods that have ocurred frequently in recent years.
机译：由小范围的强降雨或过强降雨引起的大流量，持续时间短的局部洪水突然增加的发生，对自然环境，人类生命，公共健康和财产构成最大的潜在危险威胁，这种山洪暴发的径流迅速，泥石流​​迅速上升，几乎没有或根本没有预警来防止洪灾破坏。这项研究通过平均规模的相对严重性因子的平均值来建立山洪指数，该平均值对由降雨径流模型生成的水文图特征进行量化，以计算小型无灌区的长期降雨数据，并提出了降雨特征之间的回归方程以及山洪指数。这项研究的目的是通过结合降雨强度-持续时间-频率关系和概率降雨数据中的暴洪指数来建立暴雨指数-持续时间-频率关系曲线，以评估设计暴雨对极端暴雨的脆弱性。这项研究是对现有和计划中的防洪设施的设计暴雨暴雨严重程度进行量化的初步工作，以应对近年来频繁发生的极端暴雨造成的残留洪水风险。

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