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首页> 外文期刊>Journal of Hydrology >A modelling study of rainfall-induced shallow landslide mechanisms under different rainfall characteristics
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A modelling study of rainfall-induced shallow landslide mechanisms under different rainfall characteristics

机译：不同降雨特征下降雨诱导浅层滑坡机制的建模研究

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Rainfall-induced shallow landslide is a common geological hazard around the world that can pose serious threat to both lives and property. Previous studies suggested that rainfall induced shallow landslides always occurred either above the bottom of a downward wetting front in infiltration, or below a rising water table. This paper proposed a different mechanism of shallow landslides in a modelling approach. The comprehensive physics-based Integrated Hydrology Model (InHM) and the infinite slope stability model were employed on a virtual slope to simulate the hydrologic response and estimate the slope stability. Different failure mechanisms with various characteristics were investigated under diverse rainfall scenarios (i.e., various combinations of rainfall depths, durations and temporal patterns). The results showed a novel mechanism of shallow landslides: a significant vertical change in saturated hydrologic conductivity causes the accumulation of infiltrated water, and subsequently leading to an increase pore pressures and landslides in unsaturated soil layer. More importantly, this kind of landslide would bring larger landslide volume even with smaller total rainfall depths. This study expanded our understanding about landslides and had important application in alleviating the loss of lives and property.
机译：降雨诱导的浅层滑坡是世界各地的常见地质灾害，可能对生命和财产构成严重威胁。以前的研究表明，降雨诱导的浅层滑坡总是发生在渗透下的向下润湿前底部的底部，或在上升水位下方。本文提出了一种在建模方法中的浅层滑坡不同机制。基于综合物理的集成水文模型（INHM）和无限斜坡稳定性模型在虚拟斜坡上采用，以模拟水文反应并估计斜坡稳定性。在各种降雨场景下研究了不同特征的不同故障机制（即降雨量深度，持续时间和时间模式的各种组合）。结果表明，浅层滑坡的新机制：饱和水文导电性的显着垂直变化导致渗透水的积累，随后导致不饱和土层中的孔隙压力和山滑坡。更重要的是，这种滑坡即使具有较小的降雨量深度也会带来较大的滑坡体积。这项研究扩大了我们对山体滑坡的理解，并在减轻生命和财产的损失方面具有重要应用。

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