IDEAS home Printed from https://ideas.repec.org/a/spr/nathaz/v82y2016i2d10.1007_s11069-016-2217-0.html
   My bibliography  Save this article

Object-based image analysis for mapping earthquake-induced liquefaction ejecta in Christchurch, New Zealand

Author

Listed:
  • Justin Morgenroth

    (University of Canterbury)

  • Matthew W. Hughes

    (University of Canterbury
    University of Canterbury)

  • Misko Cubrinovski

    (University of Canterbury)

Abstract

Earthquake-induced liquefaction poses significant risks to the urban environment and infrastructure lifelines. Following significant liquefaction, surface ejecta can impact facilities, impede transportation systems and complicate emergency response. Few studies have applied remote sensing technologies to map the spatial extent of liquefaction ejecta across entire affected urban areas. Here, we use object-based image analysis (OBIA) of aerial photography and light detection and ranging (LiDAR) data to map the occurrence of liquefaction ejecta following the 22 February 2011 earthquake in Christchurch, New Zealand. The OBIA achieved an 81.8 % overall accuracy for an initial classification that identified the presence or absence of liquefaction ejecta. The overall accuracy decreased to 74.8 % when attempting to distinguish between liquefaction ejecta deposited over differing land covers; this was due to the spectral and textural variation amongst these being insufficiently unique. We suggest that OBIA is useful for efficient determination of the spatial extent of post-disaster liquefaction ejecta in urban environments. This is significant for its potential to support emergency response and clean-up operations as well as longer-term ground performance and infrastructure impact assessments.

Suggested Citation

  • Justin Morgenroth & Matthew W. Hughes & Misko Cubrinovski, 2016. "Object-based image analysis for mapping earthquake-induced liquefaction ejecta in Christchurch, New Zealand," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 82(2), pages 763-775, June.
    • Handle: RePEc:spr:nathaz:v:82:y:2016:i:2:d:10.1007_s11069-016-2217-0
    DOI: 10.1007/s11069-016-2217-0
    as

    Download full text from publisher

    File URL: http://link.springer.com/10.1007/s11069-016-2217-0
    File Function: Abstract
    Download Restriction: Access to the full text of the articles in this series is restricted.
    File URL: https://libkey.io/10.1007/s11069-016-2217-0?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:spr:nathaz:v:82:y:2016:i:2:d:10.1007_s11069-016-2217-0. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.springer.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.