Feedback thresholds between coastal retreat and landslide activity
Feedback thresholds between coastal retreat and landslide activity
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海岸退缩和滑坡活动之间的反馈阈值
DOI：
10.1016/j.enggeo.2022.106620
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发表时间：
2022
影响因子：
7.4
通讯作者：
Leshchinsky, B.
中科院分区：
文献类型：
--
作者：
Alberti, S.;Olsen, M.J.;Allan, J.;Leshchinsky, B.
长期以来，侵蚀作用一直被认为是控制沿海地区滑坡活动的重要因素。尽管海岸侵蚀很重要，近年来发生了许多海岸崩塌，但对海岸侵蚀和相应的活动滑坡推进之间的反馈关系的量化描述有限。从风险评估和地貌角度，特别是考虑到未来海平面上升导致侵蚀加剧的预测，必须从数量上了解侵蚀对沿海滑坡推进的控制作用。采用三维边坡稳定模型，结合质量守恒有限差分分析，约束滑坡在侵蚀和滑坡几何演化过程中的推进。我们发现，对于给定的脚趾后退水平，山体滑坡的体积和推进程度成反比关系。滑坡高宽比和几何形状对海岸侵蚀推进敏感性具有二阶控制作用。此外，与在俄勒冈州观察到的三个特征良好的滑坡的滑坡推进相比，所提出的关系提供了对侵蚀相对于其他干扰的相对重要性的洞察，例如地下水上升。我们的发现提供了对沿海环境中滑坡动态的洞察，以推进区域沿海滑坡灾害和风险评估。
Erosive processes have long been considered an important control on landslide activity in coastal environments. Despite its importance and numerous coastal failures in recent years, there has been limited quantitative characterization of the feedbacks between coastal erosion and the commensurate advance of active landslides. Quantitatively understanding the role of erosion as a control on the advance of coastal landslides is imperative from both hazard assessment and geomorphic perspectives, particularly considering future projections of increased erosion from sea level rise. Using a three-dimensional slope stability model coupled with a mass-conserving finite difference analysis, we constrain landslide advance in response to erosion and evolving landslide geometry. We identified an inversely proportional relationship between landslide volume and magnitude of advance for a given level of toe retreat. Landslide aspect ratio and geometry may exert a second-order control on sensitivity of advance to coastal erosion. Further, in comparison to observed landslide advance of three well-characterized landslides in Oregon, the proposed relationships provide insights towards the relative importance of erosion versus other disturbances, such as groundwater rise. Our findings provide insight towards the dynamics of landslides in coastal environments to advance regional coastal landslide hazard and risk assessments.
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影响因子：
16.6
作者：
Barnard PL;Hoover D;Hubbard DM;Snyder A;Ludka BC;Allan J;Kaminsky GM;Ruggiero P;Gallien TW;Gabel L;McCandless D;Weiner HM;Cohn N;Anderson DL;Serafin KA
通讯作者：
Serafin KA
影响因子：
7.4
作者：
C. Massey;D. Petley;M. McSaveney;G. Archibald
通讯作者：
C. Massey;D. Petley;M. McSaveney;G. Archibald
英国东南部阿克斯茅斯和泰晤士河口之间的层理控制的沿海山体滑坡
DOI：
--
发表时间：
2004
期刊：
影响因子：
--
作者：
E. Bromhead;M. Ibsen
通讯作者：
M. Ibsen
大规模人工海岸滑坡的波浪侵蚀
DOI：
--
发表时间：
1998
期刊：
影响因子：
--
作者：
P. Komar
通讯作者：
P. Komar
胡斯卡纳登山体滑坡：俄勒冈海岸活跃土流的历史和近期涌动行为
影响因子：
6.7
作者：
S. Alberti;A. Senogles;K. Kingen;A. Booth;P. Castro;Jill DeKoekkoek;Kira Glover;Curran Mohney;M. Olsen;B. Leshchinsky
通讯作者：
B. Leshchinsky