V1.0 Empirical Landslide Runout Relationships, compiled from international examples, for various landslide types
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Estimating the potential runout distance of a landslide and it associated impacted area is an important component of landslide hazard and risk analysis. Empirically-based methods rely on the debris inundation area of past landslides of a given type, to estimate the anticipated debris inundation area of future landslides of a similar type This can be done using empirical runout analysis methods, where the travel distance of landslide is proportional to its fall height. The tangent of the ratio of the fall height (ΔH) to horizontal runout distance (L) between the crest of the source zone and toe of the deposit, known as the “Fahrböschung”, has subsequently been correlated with landslide volume (V) for different landslide types. Here we present datasets of ΔH/L, Fahrböschung, and volume data for 1,100 published examples, compiled from the international literature, with different site conditions (e.g., source geology, local topography, grain-size of failed material, water content of source material and erodible material along travel path, vegetation, buildings, the presence (or not) of mitigation measures). This includes rock avalanches, volcanic debris avalanches, (dry and wet) debris avalanches, and debris flows. The data is presented as csv. files containing information on the landslide location, reference source, volume and all available empirical runout data. The data can be plotted, as relationships between ΔH/L and volume, with the variability in the data used to derive probability of runout exceedance lines. Analysis of this data can provide landslide researchers and practitioners simple tools to conduct a forward-looking empirical-probabilistic runout analysis for debris avalanches, debris flows, and rock avalanches.
估算滑坡的潜在运动距离及其波及范围，是滑坡灾害与风险分析的核心环节之一。基于经验的分析方法依托特定类型既往滑坡的碎屑堆积波及范围，来预测同类未来滑坡的预期碎屑堆积范围。此类预测可通过经验滑距分析方法实现：该类方法假定滑坡的运动距离与其落差呈正比关系。源区顶部与堆积体趾部之间的落差（ΔH）与水平运动距离（L）的比值的正切值，即所谓的滑坡运动摩擦角（Fahrböschung），后续被证实与不同滑坡类型的滑坡体积（V）存在显著相关性。本研究整合国际文献中的1100个已发表滑坡案例，构建了包含ΔH/L、滑坡运动摩擦角（Fahrböschung）以及体积数据的数据集，涵盖了多种场地影响因素：包括源区地质条件、局地地形特征、滑体颗粒级配、源区物质与运移路径上易蚀物质的含水率、植被覆盖情况、建构筑物分布以及是否存在减灾措施等。该数据集涵盖岩崩、火山碎屑崩落、（干湿两类）碎屑崩落以及泥石流四类滑坡类型。数据集以csv文件形式存储，文件内包含滑坡位置、参考文献来源、滑坡体积以及所有可获取的经验滑距相关数据。可基于该数据集绘制ΔH/L与滑坡体积之间的关系曲线，并利用数据的离散性推导滑距超越概率线。对该数据集开展分析，可为滑坡研究人员与工程从业者提供简便易用的工具，用于开展碎屑崩落、泥石流以及岩崩的前瞻性经验概率型滑距分析。
