The Preservation of Climate‐Driven Landslide Dams in Western Oregon

Struble, William; Roering, Joshua J.; Burns, William J.; Calhoun, Nancy; Wetherell, Logan R.; Black, Bryan A.

doi:10.1029/2020jf005908

Cited by 9 publications

(2 citation statements)

References 111 publications

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“…Our more precise age also facilitates consideration of triggering mechanisms for the landslide. One possibility is a hydrologic trigger, wherein in a wet season or series of wet years help initiate motion, which is a possible factor for the catastrophic Oso slide in Washington State in 2014 (Henn et al, 2015) and for several landslides in Oregon (Struble et al, 2021). Another potential trigger is seismic shaking, which has caused many landslides and landslide dam disasters globally (Fan et al, 2019).…”

Section: Summary and Implicationsmentioning

confidence: 99%

“…More recently, possible triggering mechanisms have spurred research into the Bonneville landslide (e.g., Schuster and Pringle, 2002) and other landslides in the region (e.g., Schuster et al, 1992;Schulz et al, 2012;Leithold et al, 2018Leithold et al, , 2019LaHusen et al, 2020;Struble et al, 2020). These studies have mostly evaluated evidence for initiation by the last Cascadia Subduction Zone earthquake of AD 1700 or by rupture of a shallow crustal fault, but hydrological causes also have been evaluated (e.g., Henn et al, 2015;Struble et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Age of the late Holocene Bonneville landslide and submerged forest of the Columbia River Gorge, Oregon and Washington, USA, by radiocarbon dating

Reynolds¹,

O’Connor

Pringle

et al. 2022

Quat. res.

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The late Holocene Bonneville landslide, a 15.5 km2 rockslide-debris avalanche, descended 1000 m from the north side of the Columbia River Gorge and dammed the Columbia River where it bisects the Cascade Range of Oregon and Washington, USA. The landslide, inundation, and overtopping created persistent geomorphic, ecologic, and cultural consequences to the river corridor, reported by Indigenous narratives and explorer accounts, as well as scientists and engineers. From new dendrochronology and radiocarbon dating of three trees killed by the landslide, one entrained and buried by the landslide and two killed by rising water in the impounded Columbia River upstream of the blockage, we find (1) the two drowned trees and the buried tree died the same year, and (2) the age of tree death, and hence the landslide (determined by combined results of nine radiocarbon analyses of samples from the three trees), falls within AD 1421–1455 (3σ confidence interval). This result provides temporal context for the tremendous physical, ecological, and cultural effects of the landslide, as well as possible triggering mechanisms. The age precludes the last Cascadia Subduction Zone earthquake of AD 1700 as a landslide trigger, but not earlier subduction zone or local crustal earthquakes.

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Section: Summary and Implicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Age of the late Holocene Bonneville landslide and submerged forest of the Columbia River Gorge, Oregon and Washington, USA, by radiocarbon dating

Reynolds¹,

O’Connor

Pringle

et al. 2022

Quat. res.

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A global-scale applicable framework of landslide dam formation susceptibility

Wu,

Trigg,

Murphy

et al. 2024

Landslides

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The formation and failure of landslide dams is an important and understudied, multi-hazard topic. A framework of landslide dam formation susceptibility evaluation was designed for large-scale studies to avoid the traditional dependence on landslide volume calculations based on empirical relationships, which requires comprehensive local inventories of landslides and landslide dams. The framework combines logistic regression landslide susceptibility models and global fluvial datasets and was tested in Italy and Japan based on landslide and landslide dam inventories collected globally. The final landslide dam formation susceptibility index identifies which river reach is most prone to landslide dam formation, based on the river width and the landslide susceptibility in the adjacent delineated slope drainage areas. The logistic regression models showed good performances with area under the receiver operating characteristics curve values of 0.89 in Italy and 0.74 in Japan. The index effectively identifies the probability of landslide dam formation for specific river reaches, as demonstrated by the higher index values for river reaches with past landslide dam records. The framework is designed to be applied globally or for other large-scale study regions, especially for less studied data-scarce regions. It also provides a preliminary evaluation result for smaller catchments and has the potential to be applied at a more detailed scale with local datasets.

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Limits to coseismic landslides triggered by Cascadia Subduction Zone earthquakes

2022

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The Preservation of Climate‐Driven Landslide Dams in Western Oregon

Abstract: In regions of high relief, landsliding is a dominant geomorphic process that dictates landscape response to tectonically driven uplift (

Cited by 9 publications

References 111 publications

Age of the late Holocene Bonneville landslide and submerged forest of the Columbia River Gorge, Oregon and Washington, USA, by radiocarbon dating

Age of the late Holocene Bonneville landslide and submerged forest of the Columbia River Gorge, Oregon and Washington, USA, by radiocarbon dating

A global-scale applicable framework of landslide dam formation susceptibility

Limits to coseismic landslides triggered by Cascadia Subduction Zone earthquakes

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