Comment on “The reduction of friction in long-runout landslides as an emergent phenomenon” by Brandon C. Johnson et al.
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Abstract
Results from a highly idealized, 2-D computational model indicate that dynamic normal-stress rarefactions might cause friction reduction in long-runout landslides, but the physical relevance of the idealized dynamics has not been confirmed by experimental tests. More importantly, the model results provide no evidence that refutes alternative hypotheses about friction reduction mechanisms. One alternative hypothesis, which is strongly supported by field evidence, experimental data, and the predictions of a well-constrained computational model, involves development of high pore fluid pressures in deforming landslide material or overridden bed material. However, no scientific basis exists for concluding that a universal mechanism is responsible for friction reduction in all long-runout landslides.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Comment on “The reduction of friction in long-runout landslides as an emergent phenomenon” by Brandon C. Johnson et al. |
| Series title | Journal of Geophysical Research F: Earth Surface |
| DOI | 10.1002/2016JF003979 |
| Volume | 121 |
| Issue | 11 |
| Year Published | 2016 |
| Language | English |
| Publisher | American Geophysical Union |
| Publisher location | Washington, D.C. |
| Contributing office(s) | Volcano Science Center |
| Description | 5 p. |
| First page | 2238 |
| Last page | 2242 |
| Google Analytic Metrics | Metrics page |