American Society of Civil Engineers


Uncertainties in Sediment Inputs from Coastal Erosion


by Susan Hanson, (Flood Hazard Research Centre, Middlesex University, Enfield. EN3 4SF E-mail: UK. S.Hanson@mdx.ac.uk) and Robert J. Nicholls, (Flood Hazard Research Centre, Middlesex University, Enfield. EN3 4SF. UK E-mail: R.Nicholls@mdx.ac.uk)

pp. 798-807, (doi:  http://dx.doi.org/10.1061/40566(260)82)

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Document type: Conference Proceeding Paper
Part of: Coastal Dynamics ’01
Abstract: The calculation of long term coastal sediment inputs often ignores key components and uncertainties. These issues are analysed using the calculation of fine-grained sediment input from the English East Coast (Margate to Berwick on Tweed) to the North Sea between 1850 and 1994. Error analysis suggests a potential error of up to 21%. A key constituent of this error is sediment production from shoreface erosion below Mean Sea Level (MSL), which is responsible for approximately half of the total inputs. This source has been ignored in many earlier budgets. Therefore, improved estimates of both historic and future sediment inputs require better understanding of shoreface evolution on eroding coasts, as well as the composition of the eroded material.


ASCE Subject Headings:
Beach erosion
Deposition
North Sea
Sediment
Shoreline changes
United Kingdom