Simple rules to minimise exposure to coseismic landslide hazard

Milledge, David G.; Densmore, Alexander L.; Bellugi, Dino; Rosser, Nick J.; Watt, Jack; Li, Gen; Oven, Katie J.

doi:https://doi.org/10.5194/nhess-19-837-2019

Articles | Volume 19, issue 4

https://doi.org/10.5194/nhess-19-837-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/nhess-19-837-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 4

Research article

|

17 Apr 2019

Research article |

| 17 Apr 2019

Simple rules to minimise exposure to coseismic landslide hazard

David G. Milledge, Alexander L. Densmore, Dino Bellugi, Nick J. Rosser, Jack Watt, Gen Li, and Katie J. Oven

Supplement

https://doi.org/10.5194/nhess-19-837-2019-supplement

Data sets

Landslide inventories USGS https://www.sciencebase.gov/catalog/item/586d824ce4b0f5ce109fc9a6

SRTM-30m DEM data Global Data Explorer https://gdex.cr.usgs.gov/gdex/

Lidar DEM data OpenTopography http://opentopo.sdsc.edu/datasetMetadata?otCollectionID=OT.072016.32611.1

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Short summary

Mitigating landslide risk requires information on landslide hazards on a suitable scale to inform decisions. We develop simple rules to identify landslide hazards and the probability of being hit by a landslide, then test their performance using six existing landslide inventories from recent earthquakes. We find that the best rules are "minimize your maximum look angle to the skyline" and "avoid steep (> 10˚) channels with many steep (> 40˚) areas that are upslope".