Shallow submarine landslides as a geohazard to coastal infrastructure: examples from NW United Kingdom

Gareth Carter, David Long, Martyn Stoker, David Tappin, John Howe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Subaqueous mass movement events from seven different coastal locations around NW United Kingdom have been investigated, and their failure types have been assigned. Landslide dimensions and volumes were estimated, and debris lobe runout distances were obtained so as to ascertain the approximate area impacted by each event. In the majority of the case studies, shallow gas within the glaciomarine sediments was noted to be a potential trigger mechanism, along with seismic activity associated with isostatic readjustment of the bedrock following deglaciation.

The evidence suggests that there have been several failure events, along slopes composed of unconsolidated sediment to strong bedrock units, within close proximity to the UK coastline. These events have the potential to impact upon infrastructure in the marine environment, for instance pipelines, cables and aquaculture sitesopen system finfish farms, in addition to coastal infrastructure such as transport routes, piers and jetties, and even waterfront commercial and residential developments.
Original languageEnglish
Title of host publicationProceedings of the 8th International Conference, held 12-14 September 2017
Subtitle of host publicationOffshore site investigations and geotechnics: Smarter solutions for future offshore developments
PublisherSociety for Underwater Technology
Volume1
ISBN (Print)ISBN 0 906940 57 5
Publication statusPublished - 2017

Publication series

NameUnderwater Technology
PublisherSociety for Underwater Technology

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  • Cite this

    Carter, G., Long, D., Stoker, M., Tappin, D., & Howe, J. (2017). Shallow submarine landslides as a geohazard to coastal infrastructure: examples from NW United Kingdom. In Proceedings of the 8th International Conference, held 12-14 September 2017: Offshore site investigations and geotechnics: Smarter solutions for future offshore developments (Vol. 1). (Underwater Technology). Society for Underwater Technology.