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首页> 外文期刊>Bulletin of engineering geology and the environment >Rainfall thresholds for possible landslide initiation in wildfire-affected areas of western Greece
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Rainfall thresholds for possible landslide initiation in wildfire-affected areas of western Greece

机译：希腊西部山火影响地区可能引发滑坡的降雨阈值

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摘要

In August 2007, western Greece suffered one of the most devastating wildfires that has ever happened on a European level. During the 4-year period post-fire, a series of shallow landslides triggered by rainfall occurred in fireaffected areas mainly covered by Neogene sediments (marls and sandstones), causing severe economic damage. Relationships between observed landslide events and associated rainfalls were established in order to define the type of situation favorable to landslide triggering and possible critical thresholds in the rain characteristics. In order to compare the rainfall amount for the possible landslide initiation during both pre-fire and post-fire conditions, rainfall thresholds for possible landslide initiation in the unburned slopes were also proposed using a landslide inventory derived from historical archives and past rainfall data. The results suggest that the critical event rainfall (E) and the rainfall intensity (I) for landslide activity initiation is 20-30 % lower in post-fire than in pre-fire conditions.
机译：2007年8月，希腊西部遭受了欧洲范围内最严重的野火之一。火灾后的四年内，降雨引发的一系列浅层滑坡发生在主要受新近纪沉积物（泥灰岩和砂岩）覆盖的受火影响地区，造成了严重的经济损失。建立了观测到的滑坡事件与相关降雨之间的关系，以便确定有利于滑坡触发的情况类型和降雨特征中可能的临界阈值。为了比较火灾前和火灾后两种情况下可能发生的滑坡引发的降雨量，还使用从历史档案和过去降雨数据中得出的滑坡清单提出了未燃烧斜坡可能发生滑坡的降雨阈值。结果表明，与火灾前相比，火灾后引发滑坡活动的关键事件降雨（E）和降雨强度（I）降低了20-30％。

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