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#utuadobatholith — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #utuadobatholith, aggregated by home.social.

  1. 💧🌏 Greg Cocks @GregCocks ·

    Impacts of Transient Critical Zone Evolution on Landslide Susceptibility and Hazard Across the Utuado Batholith, Puerto Rico
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    doi.org/10.1029/2025JF008847 <-- shared paper
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    youtu.be/aJFe_1Bzuis?si=VKoDcM <-- shared USGS 2022 presentation video, ‘Landslides triggered by Hurricane Maria - Assessment of an extreme event in Puerto Rico’
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    doi.org/10.5194/nhess-25-1229- <-- shared research article
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    H/T @Jonathan Perkins | Research Geologist at U.S. Geological Survey (USGS)
    “How do changes to critical zone strength and structure change how hillslopes fail during extreme storms?
    Hurricane Maria triggered over 70,000 landslides across Puerto Rico in 2017. Along the hardest-hit region, in the granitic watersheds in the Cordillera Central, [the authors] utilized a natural experiment where a sharp weathering gradient follows a knickzone migrating upstream into an ancient shoreline platform.
    These changes in the local balance between erosion rates and weathering rates let us [all] ask how changes in the critical zone control landslide susceptibility, size, and failure style.
    [They] used an array of methods:
    • Landslide mapping (pre- and post- Hurricane Maria)
    • Field geophysics (seismic/resistivity) and geotechnical (DCP) surveys
    • Stream profile inversion calibrated with cosmogenic 10Be samples
    • 3D back-analysis of hillslope strength
    And found that:
    • Less weathered hillslopes produced more landslides per slope despite being substantially stronger because they store more water in the shallow subsurface that makes them hydrologically responsive during storms
    • Stronger hillslopes lead to steeper first- and second-order streams that enhance debris-flow growth and coalescence, which has significant downstream impacts on communities along the floodplains
    …”.

    @USGS

    #landslides #massmovement #extremeweather #geomorphology #naturalhazards #puertorico