2.2 Approach to Coastal Processes 39.


There has been a long history of concern along the Suffolk coast relating to offshore activities, especially marine aggregate extraction, and their perceived effect on coastal processes at the shoreline. This particularly relates to dredging on/near sandbanks, changes in wave climates which may alter nearshore sandbank stability and direct effects from cable landfall at the shore. This concern has led to a number of detailed studies to address these issues. Particularly, the Southern North Sea Sediment Transport Study and the Shoreline Management Plan 2 provide considerable detail on the effects of marine aggregate dredging on nearshore banks, and the East Anglia ZAP and East Anglia ONE ES consider cable landfall effects on the shore at Bawdsey.


40. Given that East Anglia THREE and FOUR are envisaged to have no major effects on wave climate or tidal flows, they will not cause significant changes to the nearshore sandbank systems. This has previously been demonstrated using detailed modelling approaches for East Anglia ONE and East Anglia THREE and FOUR are located further offshore, generally in deeper water and will have no significant effect in this context.


41.


The East Anglia ONE ES presented a detailed assessment of the baseline characteristics of the coastal morphology and processes along Bawdsey and adjacent frontages (Appendix 6.3) and an assessment of the potential effects arising from the offshore cable landfall from that project (Chapter 6). The offshore cables from East Anglia THREE and FOUR are intended to make landfall within the same corridor as has previously been assessed for East Anglia ONE, and shown to have no significant effect. Therefore our approach to the cable landfall assessments for East Anglia THREE and FOUR is to review the existing data and apply expertise based interpretation in the assessments within the context of the construction programmes for each of East Anglia THREE and East Anglia FOUR.


Phys_Proc_background Sept 2013


East Anglia THREE & East Anglia FOUR Page 23


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