高山和丘陵/亚平宁地区浅层滑坡的诱发因素:以意大利皮埃蒙特地区为例

IF 2.4 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Eva Fedato, G. Fubelli, L. Kurilla, Davide Tiranti
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引用次数: 0

摘要

山体滑坡是皮埃蒙特地区(意大利西北部)最常见的自然灾害。本文研究的浅层滑坡是由降雨引起的地表碎屑-崩积层滑动引起的,其特点是演化突然、快速。本研究将浅层滑坡事件与被认为是主要诱发定性因素的变量(岩性、土壤学和土地利用)进行比较,以获得GIS环境下浅层滑坡易感性的分区。此外,野火的发生也被评价为诱发浅层滑坡的进一步因素。由此得出的敏感性图显示,前三个变量与浅层滑坡发生之间存在很强的相关性,而与野火发生的关系可以忽略不计,或者非常局部。通过诱发因素与滑坡数据点的交集,得到均匀带图;每个确定的带都具有统一的岩性、土壤类型和土地利用特征。计算了各区域浅层滑坡的发生密度,得到了四阶滑坡易感性图。由此产生的易感区可用于确定和评价与浅层滑坡事件有关的危害,以供民事保护和区域规划之用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Predisposing Factors for Shallow Landslides in Alpine and Hilly/Apennines Environments: A Case Study from Piemonte, Italy
Landslides are the most common natural hazard in the Piemonte region (northwestern Italy). This study is focused on shallow landslides caused by the sliding of the surficial detrital-colluvial cover caused by rainfall and characterized by a sudden and fast evolution. This study investigates shallow landslide events compared with variables considered as main predisposing qualitative factors (lithology, pedology and land use) to obtain a zonation of shallow landslide susceptibility in a GIS environment. Additionally, wildfire occurrence is also evaluated as a further predisposing factor for shallow landslide initiation. The resulting susceptibility map shows a strong correlation between the first three variables and shallow landslide occurrence, while it shows a negligible, or very localized, relationship with wildfire occurrence. Through the intersection of the predisposing factors with the landslide data points, a map of homogeneous zones is obtained; each identified zone is characterized by uniform lithological, soil-type, and land-use characteristics. The shallow landslide density occurrence is computed for each zone, resulting in a four-range susceptibility map. The resulting susceptibility zones can be used to define and evaluate the hazard linked to shallow landslide events for civil protection and regional planning purposes.
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来源期刊
Geosciences (Switzerland)
Geosciences (Switzerland) Earth and Planetary Sciences-Earth and Planetary Sciences (all)
CiteScore
5.30
自引率
7.40%
发文量
395
审稿时长
11 weeks
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