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Post-Wildfire Landslide Hazard Assessment: The Case of The 2017 Montagna Del Morrone Fire (Central Apennines, Italy)

机译：野火过后的滑坡灾害评估：2017年蒙塔尼亚·德尔·莫罗纳大火的案例（意大利亚平宁山脉中部）

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This work focused on a post-wildfire landslide hazard assessment, applied to the 2017 Montagna del Morrone fire. This wildfire increased the possibility of landslides triggering, as confirmed by the occurrence of a debris flow, triggered by an intense, short duration rainfall event in August 2018. The study area was investigated through a detailed analysis incorporating morphometric analysis of the topography and hydrography and geomorphological field mapping, followed by the landslide hazard assessment. In detail, the analysis was performed following a heuristic or expert-based approach, integrated using GIS technology. This approach led to the identification of five instability factors. These factors were analyzed for the construction of thematic maps. Hence, each factor was evaluated by assigning appropriate expert-based ranks and weights and combined in a geomorphology-based matrix, that defines four landslide hazard classes (low, moderate, high, and very high). Moreover, the morphometric analysis allowed us to recognize basins prone to debris flows, which, in relevant literature, are those that show a Melton ratio of 0.6 and a watershed length of 2.7 km. Finally, all the collected data were mapped through a cartographic and weighted overlay process in order to realize a new zonation of landslide hazard for the study area, which can be used in civil protection warning systems for the occurrence of landslides in mountainous forested environments.
机译：这项工作的重点是野火后滑坡灾害评估，该评估适用于2017年的Montagna del Morrone大火。这场野火增加了由泥石流的发生触发的滑坡触发的可能性，泥石流的发生是由2018年8月的一次强烈的，持续时间短的降雨事件触发的。研究区域通过详细的分析进行了调查，该分析结合了地形和水文的形态计量学分析，地貌图绘制，然后进行滑坡灾害评估。详细地，分析是采用启发式或基于专家的方法进行的，并使用GIS技术进行了集成。这种方法导致了五个不稳定因素的识别。分析这些因素以构建专题图。因此，通过分配适当的基于专家的等级和权重来评估每个因素，并将其组合到基于地貌的矩阵中，该矩阵定义了四个滑坡灾害类别（低，中，高和非常高）。此外，形态分析使我们能够识别出容易发生泥石流的盆地，在相关文献中，这些盆地的梅尔顿比> 0.6，分水岭长度<2.7 km。最后，通过制图和加权叠加过程对所有收集的数据进行映射，以便为研究区域实现滑坡灾害的新分区，可将其用于民用预警系统中山区森林环境中滑坡的发生。

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