Quantifying and modeling post-failure sediment yields from laboratory-scale soil erosion and shallow landslide experiments with silty loess

Acharya, G.; Cochrane, Thomas A.; Davies, Tim; Bowman, Elisabeth T.

doi:10.1016/j.geomorph.2011.01.012

Cited by 57 publications

(21 citation statements)

References 62 publications

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“…However, their approach could not quantify the post-failure sediment yields individually. Instead of a field survey, laboratory-scale landslide studies may be conducted to investigate post-failure sediment yield (Acharya et al, 2009(Acharya et al, , 2011. This knowledge could be used to develop a landslide model, but field observations are still required to provide observational evidence.…”

Section: Introductionmentioning

confidence: 99%

Use of a total station to monitor post-failure sediment yields in landslide sites of the Shihmen reservoir watershed, Taiwan

et al. 2012

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Section: Introductionmentioning

confidence: 99%

Use of a total station to monitor post-failure sediment yields in landslide sites of the Shihmen reservoir watershed, Taiwan

et al. 2012

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“…In addition, a method for directly measuring entrainment has been proposed (McCoy et al, 2012). Laboratory experiments have also been carried out to test the effect of entrainment on the characteristics of debris flow (Mangeney et al, 2010;Acharya et al, 2011;Haas and Woerkom, 2016). Numerical experiments have also been conducted to understand the mechanics of debris flow during its movement (Zhou and Sun, 2013).…”

Section: Introductionmentioning

confidence: 99%

A study of a flowslide with significant entrainment in loess areas in China

Zhang

Kang

Chan

et al. 2017

Earth Surf Processes Landf

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Flowslides are a frequent type of natural disaster in loess areas and may result in the significant loss of properties and/or casualties. The Dagou flowslide is a typical event in a loess area and is accompanied by significant sediment entrainment. To analyze the mechanisms responsible for flowslides and to obtain the parameters for a runout analysis, a field investigation was conducted. Specimens were sampled on site to carry out laboratory tests, including a triaxial test, sieve analysis, and chemical component analysis. The parameters were used in the runout study employing an energy‐based runout model. An analytical entrainment model was adopted to calculate the entrainment after considering physical properties and the mechanism of the entrainment process of the loess. Finally, the entrainment model was incorporated into the runout model to simulate the post‐failure process of this case. Energy dissipation due to the deformation of slices was considered as it was thought to be important for a slide with a significant deformation. The simulation results were compared with the measurements, including runout distance, total volume, erosion depth, deposition height at different sections, and velocities at specific locations. The results indicate that the energy‐based runout model, together with the entrainment model, can capture the kinematic characteristics of the Dagou flowslide. Therefore, it is feasible to use this model to predict the runout characteristics of flowslides in similar areas. Copyright © 2017 John Wiley & Sons, Ltd.

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“…Sharma and Nakagawa (2010) used numerical models and conducted flume experiments to examine the relationship between the number of soil horizons and slope stability. Other studies have used laboratory experiments to examine sediment yields from shallow landslides by altering the slope angle (Acharya, Cochrane, Davies, & Bowman, 2011). Such laboratory experiments have been based on review of slope failure literature rather than examination of slope failures in the field.…”

Section: Introductionmentioning

confidence: 99%

Factors influencing the formation of shallow landslides in the Boston Mountains of northwest Arkansas, USA

2015

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Slope failures cause billions of dollars of damage annually and put human lives at risk. This study employed field measurements and observations to provide the framework for laboratory simulations to investigate the effects of environmental characteristics on slope stability in the highly fractured bedrock region of the Boston Mountains, northwest Arkansas. Field measurements, to determine characteristics and possible controls of 10 shallow slope failures along an interstate highway, revealed that slope failures occurred within a relatively narrow range of slope angles (17-36°) and in loamy soils. Based on field observations, flume experiments were conducted to investigate the relationships between soil texture, slope angle, bedrock fractures, soil compaction, and slope instability. Time to failure differed (p < 0.05) among treatment combinations. Generally, slopes composed of loam were more stable than slopes composed of sand. Time to failure decreased more on slopes of 15-20°than on slopes of 20-25°. Flume slopes with sod cover never failed. This study provided a methodology for using field analyses of slope failures to guide laboratory experiments and demonstrated that complex interactions among environmental factors work to stabilize or compromise steep (>20°) slopes.

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Quantifying and modeling post-failure sediment yields from laboratory-scale soil erosion and shallow landslide experiments with silty loess

Cited by 57 publications

References 62 publications

Use of a total station to monitor post-failure sediment yields in landslide sites of the Shihmen reservoir watershed, Taiwan

Use of a total station to monitor post-failure sediment yields in landslide sites of the Shihmen reservoir watershed, Taiwan

A study of a flowslide with significant entrainment in loess areas in China

Factors influencing the formation of shallow landslides in the Boston Mountains of northwest Arkansas, USA

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