Brooks, Susan

Schuerch, M.

Spencer, T.

Tempest, J.

Name not available

Geophysical Research AbstractsVol. 20, EGU2018-15912, 2018EGU General Assembly 2018© Author(s) 2018. CC Attribution 4.0 license.Barrier dynamics in Disaster Risk Reduction: storm impacts and recoveryassessment from Remote SensingSue Brooks (1), James Tempest (2), Mark Schuerch (3), and Tom Spencer (3)(1) University of London, Birkbeck, Geography, Environment and Development Studies, London, United Kingdom(s.brooks@bbk.ac.uk), (2) CH2M Jacobs, Burderop Park, Swindon, SN4 0QD, United Kingdom, (3) Cambridge CoastalResearch Unit, Department of Geography, University of Cambridge, United KingdomSoft mobile sediment shorelines with barrier island systems, such as are found around East Anglia, UK, are highlyvulnerable to storm impacts, yet play a vital role in protecting the immediate landward zone. Barriers composedof sand and gravel typify the North Norfolk coast and while they have their own internal dynamics in relation tostorms and recovery, they also interact with changes in the back-barrier marshes to landward and the dynamics ofseaward-located onshore migratory inter-tidal bars. Over the past 20 years, system interactions and dynamics hasbeen assessed solely using 2-dimensional airborne aerial photographs, tracking changes in the vegetated edges ofthe barriers and marshes. This has been supplemented with cross-shore profile data to provide patchy but useful3-dimensional insight into the interactions of the different cross-shore settings. More recently, however, a consider-ably enhanced 3-dimensional picture of storm impacts and barrier/marsh recovery is made possible using airborneand terrestrial LiDAR. Monitoring the nature and extent of changes to barrier and marsh systems during and fol-lowing a major storm (occurring in December 2013) is now possible at a high level of spatial coverage, as well asthrough time. With this capability we can now unravel in greater detail than ever previously possible the capacityfor natural barrier systems to grow to withstand the impact of high magnitude events that are likely to occur infuture under changing storminess. This paper uses the example of Holkham, North Norfolk (a strong sedimentsink or region of positive diffusivity) to explore and quantify these natural shoreline defence dynamics.

Barrier dynamics in disaster risk reduction: storm impacts and recovery assessment from remote sensing

Birkbeck Institutional Research Online

http://eprints.bbk.ac.uk/22029/1/EGU2018-15912.pdf

Barrier dynamics in disaster risk reduction: storm impacts and recovery assessment from remote sensing

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