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首页> 外文期刊>Natural hazards and earth system sciences >The 9 September 2010 torrential rain and flash flood in the Dragonecatchment, Atrani, Amalfi Coast (southern Italy)
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The 9 September 2010 torrential rain and flash flood in the Dragonecatchment, Atrani, Amalfi Coast (southern Italy)

机译：2010年9月9日，阿马尔菲海岸（意大利南部）阿特拉尼的Dragonecatchment暴雨和山洪

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In this paper we use a multi-hazard approach to analyse the 9 September 2010flash flood in the Dragone basin, a 9?km2 catchment located along theAmalfi rocky coastal range, southern Italy. In this area,alluvial fan flooding has been the most frequent and destructive geologic hazardsince Roman times. Sudden torrents of water (flash floods) are caused byhigh-intensity and very localized cloudbursts of short duration, inducingslope erosion and sediment delivery from slope to stream. The elevated bedload transport produces fast-moving hyperconcentrated flows with significantcatastrophic implications for communities living at the stream mouth.The 9 September 2010 rainstorm event lasted 1?h with an intensityrainfall peak of nearly 120?mm?h−1. High topographic relief of theAmalfi coastal range and positive anomalies of the coastal watersconditioned the character of the convective system. Based on geological dataand post-event field evidence and surveys, as well as homemade videos andeyewitness accounts, it is reported that the flash flood mobilized some 25?000?m3 ofmaterials with a total (water and sediment) peak flow of 80?m3?s−1.The estimated peak discharge of only clear water was about 65?m3?s−1.This leads to a sediment bulking factor of 1.2 that corresponds to a flowwith velocities similar to those of water during aflood.
机译：在本文中，我们采用多灾种方法分析了Dragone盆地2010年9月9日的山洪暴发，Dragne盆地是一个9？km 2 集水区，位于意大利南部阿马尔菲多岩石的沿海地区。在该地区，自罗马时代以来，冲积扇洪水一直是最常见和最具破坏性的地质灾害。突如其来的洪水（山洪暴发）是由于高强度，持续时间很短的局部暴发性暴雨引起的，引起了边坡的侵蚀和从边坡到河流的沉积物输送。高架的河床运输产生快速移动的高浓度水流，对生活在河口的社区造成重大灾难性影响。 2010年9月9日的暴雨持续了1？h，强度降雨峰值接近120？mm？h −1 。阿马尔菲沿海地区的高地形起伏和沿海水域的正异常条件决定了对流系统的特征。根据地质数据和事后现场证据和调查，以及自制的录像带和目击者的记录，据报道，山洪暴发动员了约25？000？m 3 的物质，其总量（水和沉积物）峰值流量为80？m 3 ？s -1 。仅清水的估计峰值流量约为65？m 3 ？s -1 。这导致沉积物的膨胀系数为1.2，对应于流速与洪水期间的水流速相似的流速。

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