Combining InSAR and GPS to determine transient movement and thickness of a seasonally active low-gradient translational landslide

Geophysical Research Letters
By: , and 

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Abstract

The combined application of continuous Global Positioning System data (high temporal resolution) with spaceborne interferometric synthetic aperture radar data (high spatial resolution) can reveal much more about the complexity of large landslide movement than is possible with geodetic measurements tied to only a few specific measurement sites. This approach is applied to an ~4 km2 reactivated translational landslide in the Columbia River Gorge (Washington State), which moves mainly during the winter rainy season. Results reveal the complex three-dimensional shape of the landslide mass, how onset of sliding relates to cumulative rainfall, how surface velocity during sliding varies with location on the topographically complex landslide surface, and how the ground surface subsides slightly in weeks prior to downslope sliding.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Combining InSAR and GPS to determine transient movement and thickness of a seasonally active low-gradient translational landslide
Series title Geophysical Research Letters
DOI 10.1002/2017GL076623
Volume 45
Issue 3
Year Published 2018
Language English
Publisher American Geophysical Union
Contributing office(s) Volcano Science Center
Description 10 p.
First page 1453
Last page 1462
Country United States