用于评估复杂滑坡系统时空差异运动学的 PS-InSAR 后处理:德贝克峡谷滑坡(美国科罗拉多州)案例研究

IF 2.8 3区 地球科学 Q2 GEOGRAPHY, PHYSICAL
Marta Zocchi, Michele Delchiaro, Francesco Troiani, Gabriele Scarascia Mugnozza, Paolo Mazzanti
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引用次数: 0

摘要

滑坡系统中不同运动学和嵌套区段的复杂叠加,加大了解释其异质位移模式和制定有效缓解方案的难度。DeBeque Canyon 滑坡(美国科罗拉多州)就是这种特殊时空行为的一个例子,它是应用干涉测量后处理分析进行详细远程调查的典范。我们采用了多几何持久散射体(PS)InSAR 数据集来提供时空尺度上的连续信息,并实现了分段运动学和时间的可靠表示。利用最新的滑坡系统地貌图,我们对持久散射体(PS)数据集进行了二维分解,以确定滑坡系统每个内部区域的位移方向和倾斜度。然后,我们对位移矢量特征和时间序列数据进行了统计分析。这些分析使我们能够从空间上描述滑坡系统的分段活动模式,并确定与准备和触发因素相关的趋势突变。仅使用表面位移测量方法,就能明确区分滑坡系统内的旋转或平移运动学。此外,在二维矢量时间序列上应用贝叶斯模型,可以识别出每个区段的变形行为与降水和温度因素之间的显著差异。我们的方法是一种可复制的方法,可用于对表现出复杂时空位移模式的滑坡进行局部特征描述和监测,并从降低风险的角度为交通机构提供有效、低成本的解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

PS-InSAR post-processing for assessing the spatio-temporal differential kinematics of complex landslide systems: A case study of DeBeque Canyon Landslide (Colorado, USA)

PS-InSAR post-processing for assessing the spatio-temporal differential kinematics of complex landslide systems: A case study of DeBeque Canyon Landslide (Colorado, USA)

The complex superimposition of different kinematics and nested sectors within landslide systems amplifies the challenge of interpreting their heterogeneous displacement pattern and targeting effective mitigation solutions. As an example of such peculiar spatio-temporal behaviour, the DeBeque Canyon Landslide (Colorado, USA) is emblematic of the application of interferometric post-processing analysis for a detailed, remotely-based investigation. We employed a multi-geometry Persistent Scatterers (PS) InSAR dataset to provide continuous information on the spatio-temporal scale and achieve a solid representation of the segmented kinematics and timings. Using an updated geomorphological map of the landslide system, we performed a two-dimensional decomposition of the Persistent Scatterers (PS) dataset to determine the displacement orientation and inclination for each internal sector of the landslide system. We then conducted statistical analyses on the displacement vector characteristics and time series data. These analyses enabled us to spatially characterize the segmented activity patterns of the landslide system and identify abrupt changes in trends associated with preparatory and triggering factors. A clear differentiation of the rotational or translational kinematics within the landslide system was accomplished solely using surface displacement measures. Moreover, the application of a Bayesian model on the bi-dimensional vector time series leads to the identification of significant differences in the deformational behaviour of each sector with respect to precipitation and temperature factors. Our approach represents a replicable method for local-scale characterization and monitoring of landslides exhibiting complex spatio-temporal displacement patterns and providing an effective, low-cost solution for transportation agencies from a risk-reduction perspective.

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来源期刊
Earth Surface Processes and Landforms
Earth Surface Processes and Landforms 地学-地球科学综合
CiteScore
6.40
自引率
12.10%
发文量
215
审稿时长
4 months
期刊介绍: Earth Surface Processes and Landforms is an interdisciplinary international journal concerned with: the interactions between surface processes and landforms and landscapes; that lead to physical, chemical and biological changes; and which in turn create; current landscapes and the geological record of past landscapes. Its focus is core to both physical geographical and geological communities, and also the wider geosciences
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