The 13 August 2010 catastrophic debris flows after the 2008 Wenchuan earthquake, China
The 13 August 2010 catastrophic debris flows after the 2008 Wenchuan earthquake, China
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DOI：
10.5194/nhess-12-201-2012
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发表时间：
2012-01
影响因子：
4.6
通讯作者：
Qiang Xu;Shuai Zhang;Wei-le Li;T. V. Asch
中科院分区：
文献类型：
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作者：
Qiang Xu;Shuai Zhang;Wei-le Li;T. V. Asch
抽象的。2010年8月12日至14日，四川省中国西南部受2008年汶川地震影响的地区出现大暴雨，引发灾难性泥石流。这次灾害被命名为“8.13泥石流”。研究结果表明，8.13泥石流具有同时发生、快速启动、破坏性影响和灾害链效应的特点。它们位于地震断层上，因为源岩主要来自汶川地震引发的松散滑坡堆积物。斜坡上大量松散物质的存在和高强度降雨事件的发展是形成这些泥石流的主要原因。对8.13泥石流的研究可以为分析这些泥石流的长期演变提供一个基准，以便做出适当的工程决策。本文提出了一种灵活的排水系统，作为一种预防措施，以缓解地震灾区日益增长的泥石流活动。
Abstract. From 12 to 14 August 2010, heavy rainstorms occurred in the Sichuan province in SW China in areas which were affected by the 2008 Wenchuan Earthquake, inducing catastrophic debris flows. This disaster is named as "the 8.13 debris flows". The results of the research presented in this paper show that the 8.13 debris flows are characterized by a simultaneous occurrence, rapid-onsets, destructive impacts, and disaster chain effects. They are located along the seismic fault, because the source materials mainly originate from loose deposits of landslides which were triggered by the Wenchuan Earthquake. The presence of large amounts of these loose materials on the slopes and the development of high intensity rainfall events are the main causes for the formation of these debris flows. The study of the 8.13 debris flows can provide a benchmark for the analysis of the long-term evolution of these debris flows in order to make proper engineering decisions. A flexible drainage system is proposed in this paper as a preventive measure to mitigate the increasing activity of these debris flows in the earthquake-affected area.