Shoreline Management Plan (1997) - Mangement Unit Diagrams



Chainage: 31600 m
37000 m
Tolerance: +/- 400 m
  +/- 400 m
Worthing, South Lancing

Planning Policy

Planning Policy Adminstration:
West Sussex C.C., Worthing B.C., Adur D.C.

Statutory Policy Documents:
West Sussex Structure Plan, 1993
West Sussex Structure Plan, Consultation Draft, 1995
West Sussex Minerals Local Plan, Consultation Draft, 1994
Worthing Local Plan, 1994
Non Statutory Documents:
A Leisure Strategy for Worthing, Draft, January 1994
A Coastal Strategy for West Sussex, June 1994
River Arun and West Sussex Catchment Management Plan

Conservation Designations:
Heene Cemetery SNCI, conservation areas including Seafront and Hinterland,
Pier is a Listed Building, The Lido is a listed building.
Several Environmental Areas of Special Character
Worthing Lumps Marine SNCI (offshore)

Landscape Designations:

Natural Environment

Statutory Designations:
Non-statutory Designations:
Worthing Lumps Marine SNCI.

Terrestrial Habitats:
Vegetated shingle, grassland.
Marine Habitats:
Shallow reef, shallow cobble, chalk cliffs, piers and harbour walls.

Coastal Processes

There has been a long term historical trend of Low Water Line retreat and beach steepening mitigated by groynes (pre-1876). However, the recent average trend has been net accretion within the unit. Net sediment transport is easterly. Sea-level rise is likely to increase the tendency for erosion of the foreshore.

Strategic Defence Options

Do nothing :
Not a viable option because of risk to existing development and infrastructure.

Hold the line : It is necessary to protect infrastructure and existing developments close to the shoreline: this is currently the preferred strategic option.

Retreat the line:
Not viable in the short/medium term because of existing infrastructure and development.

Advance the line :
Not a viable option because accretion is not necessarily a long term trend and advancing the line here could have detrimental consequences for the shoreline to the east.

Coastal Defences
Responsible Organisations:
Worthing B.C.
Defence Length Codes:
3508-3501, 3612-3601, 2601
Existing Types:
Some Seawall, Some Shingle Revetment, Mostly Groynes, Mostly Shingle Embankment
Refer to Appendix 1. The groyne field has mostly short term residual life
Historic Defences:
Groynes (pre-1876)
Timber Breakwater (1930)
Coastal Structures:
East Worthing Outfall, Pier, The Lido.
Recent Recharge/Dredging:
Recharge :
Recycling :
Bypassing :
Dredging :
Proposed Schemes:
New Rock Groynes (1997), near Worthing

Interaction with Adjacent Units

The unit requires a continuing net supply of sediment from the west (MU 8A); similarly, the net drift of sediment out of the unit to the east should be maintained in order to avoid starving downdrift units (MU 9A+). Hold the Line, by maintaining the present regime, will tend to maintain the existing supply of sediment downdrift, subject to an adequate supply of sediment into the unit from updrift.

Future Defence Needs

The urban development and road (A259) which runs close behind the shoreline will require continuing defence in the medium/long term. The historic long term trend of Low Water Line retreat and beach steepening, coupled with the potential impacts of sea-level rise and climatic change, are likely to require continuing reinforcement of the defences.

Management Unit 8B (please refer to 'Management Unit Diagrams' for Map Legend and an explanation of terms in the Chart.)

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