Table of Contents 8


8.1 8.2 8.3


8.3.1 8.3.2 8.3.3


8.4


8.4.1 8.4.2 8.4.3 8.4.4 8.4.5


8.5


8.5.1 8.5.2 8.5.3


8.6


8.6.1 8.6.2 8.6.3


8.7 8.8


Marine Water and Sediment Quality.............................................................1 Introduction .................................................................................................1 Consultation.................................................................................................1


Scope ...........................................................................................................3 Study Area.............................................................................................................3 Worst Case............................................................................................................4 Embedded Mitigation Specific toMarine Water and Sediment Quality..............9


Assessment Methodology.............................................................................9 Guidance...............................................................................................................9 Data sources .......................................................................................................13 Impact Assessment Methodology ......................................................................15 Cumulative Impact Assessment..........................................................................20 Transboundary Impact Assessment ...................................................................20


Existing Environment .................................................................................. 21 Background.........................................................................................................21 Suspended Sediment Concentration..................................................................22 Site Specific Survey.............................................................................................22


Potential Impacts........................................................................................ 27 Potential Impacts during Construction...............................................................27 Potential Impacts during Operation...................................................................31 Potential Impacts during Decommissioning.......................................................32


Cumulative Impacts .................................................................................... 32 Transboundary Impacts .............................................................................. 33


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm Chapter 8 Marine Water and Sediment Quality


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