Appendix 8
Summary of inputs
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Drift modelling (COSMOS):
Ø
Holderness (Hornsea)
Refined modelling (TELEMAC) at:
Ø
Winterton Ness (full wave-current modelling)
Ø
Clacton (tidal modelling)
For:
Ø
Different grades of sediment
Ø
Different forcing scenarios (influence of tidal
range and wave stirring)
Ø
Role of storms/surge – surge levels, wind stress,
wave stirring
Predictions of sediment flux (SANDFLOW):
Ø
Tidal residual
Ø
Peak flux and direction
Predictions of sediment mobility
Model Results – area model, local modelling, drift
modelling (HRW - SNS2)
Model for Southern North Sea and English Channel
(TELEMAC)
Velocity field (validated with new Process data and
data from Data archive)
Analysed in collaboration with BGS as part of Humber Estuary SMP2 project
Seabed features:
Ø
CEFAS sidescan – Humber1, Winterton,
Clacton
Ø
HHA/CEFAS sidescan – Harwich
Ø
Dredging surveys
Interpreted sediment transport:
Ø
BGS Sed Trans intepretation (sandwave
asymmetry, megaripple asymmetry, seismic
structure, comet or wreck marks) –
modified and added to in places by SNS2
team
Ø
SNS2 team additional interpretation (sand
streaks, megaripple patches, sandwave
asymmetry)
BGS:
Ø
Seabed sediment distribution (whole
UKCS)
Ø
Seabed sediment distribution (20 km
coastal strip) GIS layer
Ø
Seabed facies GIS layer
Ø
Seabed bedforms GIS layer
Ø
Anglian Sea Defence Management Study
Phase III – Nearshore corridor mapping (16
areas, available from EA Anglian in .dxf
format)
UKHO:
Ø
Seabed topography (bathymetry)
Seabed features
Aggregate extraction records
Sediment deposition centres:
Ø
Estuaries and embayments
Ø
Coastal areas
Ø
Offshore areas including deeps
Area model results
Ø
Waves, currents, sediment transport
Surface water-sediment samples (synoptic):
Ø
Winterton, Clacton, Humber
Data archive:
Ø
Synoptic water-sample
Ø
Current meter time series (moorings)
Ø
Process studies (landers)
Surface-water salinity (synoptic):
Ø
Humber
Seabed erosion
Coastal erosion
Sediment tracer:
Ø
Winterton Ness
Internal structure of sediment bodies (seismics)
Coastal sediment cells
Coastal sediment modelling
Ø
GIS catalogue and interpretation (collated into GIS
layer)
Ø
Graphical representations
Sediment tracers:
Ø
Shingle, sand, fine sediments
Heavy mineral analysis
Seabed drifters
Ø
Humber
Ø
East coast
STA studies:
Ø
Humber
Ø
East coast
Satellite/modelling studies:
Ø
e.g. PROMISE project
Fine sediment flux:
Ø
North Sea Project
Ø
Humber flux curtain
Process study literature
Ø
Waves, currents, sediment transport (flux)
Phase 1, Southern North Sea Sediment Transport Study report
Bedforms and morphology literature
Seabed sediment literature
Other published information
Sediment flux:
Ø
Product of ABS and current meter (at height of
current meter and also ? integrate over height
assuming suitable current profile)
Ø
Product of OBS and current meter (at height of
instruments and also ? integrate over height
assuming suitable current profile and concentration
profile)
Sediment concentration:
Ø
Fines (optical backscatter OBS)
Ø
Sand (acoustic backscatter ABS)
Ø
Booner tube samples (sediment composition)
Bed shear stress due to W+C from measurements of
waves (1. wave pressure record converted to bottom
orbital velocity and 2. from current meter records) and
currents
Velocities:
Ø
Waves and currents from frame mounted
instruments (Winterton, Clacton)
Ø
Time averaged currents from moored current
meters (Winterton, Clacton)
Ø
Time averaged currents from MV ADCP surveys
(Winterton, Clacton)
Process data (CEFAS – SNS2)
Southern North Sea Sediment Transport Study, Phase 2 - Sediment Transport Report – Appendix 8 Summary of inputs
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