Landslide movement in southwest Colorado triggered by atmospheric tides

Schulz, William H.; Kean, Jason W.; Wang, Gonghui

doi:10.1038/ngeo659

Cited by 141 publications

(107 citation statements)

References 11 publications

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“…As the strength along the slip surface is already at, or close to, the residual value the low magnitude velocities illustrated in Figure 13 were expected and are characteristic of a reactivation on an already defined rupture surface. For example, Schulz et al (2009) described how the Slumgullion Landslide displayed daily movement patterns where increased velocity seemingly coincided with the diurnal low tides of the atmosphere as changes in air pressure altered the frictional resistance along the shear surface leading to daily velocity cycles that have a peak of roughly 2-3mm/hour, and Matsuura et al (2008) reported the monitoring of a reactivated landslide under constant creep in Japan that experienced an average hourly displacement of 0.7mm.…”

Section: Ae Rate-and Velocity-time Deformation Event Profilesmentioning

confidence: 99%

Quantification of reactivated landslide behaviour using acoustic emission monitoring

et al. 2014

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Section: Ae Rate-and Velocity-time Deformation Event Profilesmentioning

confidence: 99%

Quantification of reactivated landslide behaviour using acoustic emission monitoring

et al. 2014

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“…Understanding of failure mechanisms of creeping landslides is of critical importance for assessment and mitigation of their hazard (Terzaghi 1950;Chandler & Pook 1971;Glastonbury & Fell 2008;Schulz et al 2009). In general, when a creeping landslide is constrained by an obstacle, either natural (a rock outcrop) or artificial (a retaining wall), it slows down, creating an impression of being stabilized (Bernander & Olofsson 1981;Wiberg et al 1990;Puzrin & Sterba 2006).…”

Section: Introductionmentioning

confidence: 99%

Progressive failure of a constrained creeping landslide

Puzrin

Schmid

2011

Proc. R. Soc. A.

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The ski resort town of St Moritz, Switzerland, is partially constructed on a large creeping landslide, which has been causing damage to buildings and infrastructure. At the town centre, the landslide is constrained by a rock outcrop, creating a compression zone in the sliding mass. After decades of gradual slowing down,s in the beginning of 1990s the landslide started to accelerate, in spite of the fact that the average yearly precipitation and the pore water pressure on the sliding surface remained fairly constant. The paper shows that a constrained creeping landslide experiences progressive failure caused by the propagation of a zone of intense shearing along the slip surface resulting in significant earth pressure increase and visco-plastic yielding of soil in the compression zone. This basic physical mechanism, relying on extensive laboratory and field tests and long-term displacement monitoring, explains the paradox of the St Moritz landslide acceleration. Although the model predicts that the landslide could eventually slow down, its displacements may become excessive for some buildings, requiring an early warning system and further stabilization of the historic Leaning Tower. In general, by predicting the onset of yielding, the model can provide an important timeframe for stabilization of constrained landslides.

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“…However, if surface ponding occurs or the flow in the soil is limited by low permeability layers, these simplifications often do not hold. Another aspect is that the soil air can transmit pressure reactions, which may be an issue for slope stability where pressure differences can trigger landslides (Schulz et al 2009). The limitation of the Richards equation can be overcome using the two-phase flow equations (Bear 1972) for two immiscible fluids (water/air) instead of Richards equation.…”

Section: Introductionmentioning

confidence: 99%

Modeling Macroporous Soils with a Two-Phase Dual-Permeability Model

2012

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Fast water infiltration during heavy rainfall events is an important issue for hillslope hydrology and slope stability. Most hillslopes are strongly heterogeneous and contain macropores and soil pipes, so that infiltrating water can bypass the soil matrix and reach rapidly deeper regions. Water infiltration into macroporous soils is usually simulated with dual-permeability models based on Richards equation (RDPM) which only describes water flow. In this article, we present a two-phase dual-permeability model (TPDPM) for simulating water and air flow in macroporous soils. Water and air flow are simulated in both domains and mass transfer for water and air between the domains is included with first-order transfer terms. The main objectives of this article are to discuss the differences between TPDPM and RDPM and to test the application of the TPDPM on the slope scale. First, the differences between RDPM and TPDPM were studied using a one-dimensional layered soil. For the chosen high infiltration rate, we observed significant differences in the macropore domain and small differences in the matrix depending on the transfer parameter. Second, we applied the model to simulate fast water infiltration and flow through an alpine hillslope, where the water flow mainly occurs in the macropore domain and the matrix domain is bypassed because it is low permeability. A good agreement of simulated and measured travel times of Wienhöfer et al. (Hydrol Earth Syst Sci 13(7):1145-1161, 2009) was obtained. Finally, we recommend using TPDPM for high infiltration in layered macroporous soils.

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Landslide movement in southwest Colorado triggered by atmospheric tides

Cited by 141 publications

References 11 publications

Quantification of reactivated landslide behaviour using acoustic emission monitoring

Quantification of reactivated landslide behaviour using acoustic emission monitoring

Progressive failure of a constrained creeping landslide

Modeling Macroporous Soils with a Two-Phase Dual-Permeability Model

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