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Title: Spatiotemporal Patterns of Precipitation-Modulated Landslide Deformation From Independent Component Analysis of InSAR Time Series

Abstract

We present that long-term landslide deformation is disruptive and costly in urbanized environments. We rely on TerraSAR-X satellite images (2009–2014) and an improved data processing algorithm (SqueeSAR™) to produce an exceptionally dense Interferometric Synthetic Aperture Radar ground deformation time series for the San Francisco East Bay Hills. Independent and principal component analyses of the time series reveal four distinct spatial and temporal surface deformation patterns in the area around Blakemont landslide, which we relate to different geomechanical processes. Two components of time-dependent landslide deformation isolate continuous motion and motion driven by precipitation-modulated pore pressure changes controlled by annual seasonal cycles and multiyear drought conditions. Two components capturing more widespread seasonal deformation separate precipitation-modulated soil swelling from annual cycles that may be related to groundwater level changes and thermal expansion of buildings. Lastly, high-resolution characterization of landslide response to precipitation is a first step toward improved hazard forecasting.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [4]
  1. Univ. of California, Berkeley, CA (United States). Department of Civil and Environmental Engineering
  2. Univ. of California, Berkeley, CA (United States). Berkeley Seismology Laboratory and Department of Earth and Planetary Science
  3. State University of New York at Buffalo, NY (United States). Department of Geology
  4. TRE ALTAMIRA, Milan (Italy)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1479390
Alternate Identifier(s):
OSTI ID: 1422634
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 45; Journal Issue: 4; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES; landslide; InSAR; ICA; precipitation; deformation; triggering processes

Citation Formats

Cohen-Waeber, J., Bürgmann, R., Chaussard, E., Giannico, C., and Ferretti, A. Spatiotemporal Patterns of Precipitation-Modulated Landslide Deformation From Independent Component Analysis of InSAR Time Series. United States: N. p., 2018. Web. doi:10.1002/2017GL075950.
Cohen-Waeber, J., Bürgmann, R., Chaussard, E., Giannico, C., & Ferretti, A. Spatiotemporal Patterns of Precipitation-Modulated Landslide Deformation From Independent Component Analysis of InSAR Time Series. United States. doi:10.1002/2017GL075950.
Cohen-Waeber, J., Bürgmann, R., Chaussard, E., Giannico, C., and Ferretti, A. Mon . "Spatiotemporal Patterns of Precipitation-Modulated Landslide Deformation From Independent Component Analysis of InSAR Time Series". United States. doi:10.1002/2017GL075950. https://www.osti.gov/servlets/purl/1479390.
@article{osti_1479390,
title = {Spatiotemporal Patterns of Precipitation-Modulated Landslide Deformation From Independent Component Analysis of InSAR Time Series},
author = {Cohen-Waeber, J. and Bürgmann, R. and Chaussard, E. and Giannico, C. and Ferretti, A.},
abstractNote = {We present that long-term landslide deformation is disruptive and costly in urbanized environments. We rely on TerraSAR-X satellite images (2009–2014) and an improved data processing algorithm (SqueeSAR™) to produce an exceptionally dense Interferometric Synthetic Aperture Radar ground deformation time series for the San Francisco East Bay Hills. Independent and principal component analyses of the time series reveal four distinct spatial and temporal surface deformation patterns in the area around Blakemont landslide, which we relate to different geomechanical processes. Two components of time-dependent landslide deformation isolate continuous motion and motion driven by precipitation-modulated pore pressure changes controlled by annual seasonal cycles and multiyear drought conditions. Two components capturing more widespread seasonal deformation separate precipitation-modulated soil swelling from annual cycles that may be related to groundwater level changes and thermal expansion of buildings. Lastly, high-resolution characterization of landslide response to precipitation is a first step toward improved hazard forecasting.},
doi = {10.1002/2017GL075950},
journal = {Geophysical Research Letters},
number = 4,
volume = 45,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
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Cited by: 1 work
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Figures / Tables:

Figure 1 Figure 1: TerraSAR-X mean line-of sight range-change velocity map of the East Bay Hills area obtained from the SqueeSAR ™ analysis, showing motion relative to the reference point (Ref). The positive values (blue colors) show motion toward the satellite (i.e., uplift or eastward movement), and the negative values (red colors)more » show motion away from the satellite (i.e., subsidence or westward movement).« less

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