Trimingham Erosion Project: can next decades coastal erosion rates be more accurately assessed?
2017
On the 28/03/2017 BGS was contacted by the Environment Agency (Kellie Fisher ,
FCRM Senior Advisor – Norfolk, Coastal Partnerships & Strategic Overview Team East
Anglia Area) to investigate if erosion rates at Trimingham can be more accurately
assessed?. Overall erosion rates are relatively consistent when averaged over the
years, at any one point along the Trimingham coast there are periods of higher than
usual rates of erosion followed by periods of relative stability. This makes erosion
rate prediction particularly difficult. Report data suggests that between 1966 and
1985 the cliff eroded between 1.5-2.5 metres per year. Historic mapping data
suggests between 50 and 60 metres of erosion over a period of 100 years, which
would indicate an erosion rate between 0.5-0.6 metres per year. Shoreline
Management Plan mapping indicates that 75-150 metres of erosion could be
expected over the next 100 years (0.75-1.5 metres per year). These figures highlight
the difficulties in predicting accurate erosion rates. On the 31/03/2017 BGS coastal
modellers, Andres Payo and Andrew Barkwith discussed over the phone with Kellie
Fisher whether BGS could provide additional evidences to narrow down the
expected future erosion rates at Trimingham for the different SMP epochs (0-20, 20-
50, 50-100 years from now). This document summarizes the activities that BGS has
done, to date 17/09/2017, as part of our National Capabilities to address this issue.
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