Feasibility Study on the Use of Dispersants in the Bristol Channel in the Event of an Oil Pollution Incident (2002)
Astudiaeth ddichonoldeb ar ddefnyddio gwasgarwyr ym Mor Hafren pe bai damwain olew yn digwydd 2002

  • English
  • wel
  • All

The approval and use of oil spill dispersants is regulated in UK waters. The Food and Environment Protection Act 1985 requires that a licence be issued for the deposit of any substance or article in the sea or that an exemption be granted under the Deposits in the Sea (Exemptions) Order 1985. The licensing authority for England and Wales is DEFRA (Department of Environment, Food and Rural Affairs (formerly MAFF - Ministry of Agriculture, Fisheries and Food).


Specific permission to use oil spill dispersants in shallow water (defined as areas of sea where the water depth is less than 20 metres, as marked on Admiralty charts, or within 1 nautical mile of such area) must be granted by DEFRA. The role of the EG will be to provide information about the sensitivities of resources in the area to oil pollution, so that DEFRA can make a reasoned decision on dispersant use.


The BCSEG considered many different relevant factors including the oil spill risks, likely spilled oil behaviour, characteristics of the Bristol Channel and the shoreline and marine resources that could be affected by spilled oil. The consequences of dispersing or not dispersing spilled oil were also considered. As a result of these deliberations, the areas of the Bristol Channel and Severn Estuary have been designated as dispersant use or non-use zones.


These zones are marked on maps for ease of reference. These zones are:

- Zone A Where dispersants can be used at any time of the tide

- Zone B Where dispersants can be used (but only with DEFRA's specific permission) on an outgoing tide from High Water until High Water + 5 hours

- Zone C Where dispersants can be used (but only with DEFRA's specific permission) on an outgoing tide from High Water until High Water + 2 hours

- Zone D Where dispersants are not to be used at any time .


In the event of oil pollution occurring in the Bristol Channel an Environment Group (EG) will be activated to consider the environmental consequences of the spill and the most suitable ways in which damage can be minimised. The use of oil spill dispersants is a response method that might be used. The Bristol Channel Standing Environment Group (BCSEG) commissioned this report to describe the factors in the Bristol Channel that need to be considered when deciding to use, or not to use, oil spill dispersants.

Identification

Dynodydd
Identifier
NRW_DS113767
Laith Metadata
Metadata Language
English
Lineage

The Bristol Channel has the second largest tidal range in the world and has been the focus of many hydrodynamic studies. A recent study, Bristol Channel Marine Aggregates - Resources and Constraints (Posford Duvivier, 2000) contains comprehensive details of many aspects of the Bristol Channel, including: - Tides (range, flow patterns and residual currents) - Wind (directions and speeds) - Waves (height and direction) - Sediment distributions - Macrofauna distributions The Severn Estuary / Mor Hafren Shoreline Management Plan (Gifford Associated Consultants, 1998) also contains many detailed maps of many physical characteristics such as seabed sediments. No new studies have been carried out on these aspects for the preparation of the report. Data is unique and irreplaceable. Important operational and decision making data.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2002-12-31
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Lewis -
A. Lewis, 121 Laleham Road, Staines, Middlesex, TW18 2EG
http://naturalresourceswales.gov.uk/splash?orig=/
 

Extent

Extent

Hyd
Geographic Extent
Wales (WLS)
Hyd
Geographic Extent
England (ENG)
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword
water column boundary layer
 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Documents ( )

    Specification

    The present report comprises the following:- [A] Published summary report (paper and PDF version) [B] Maps highlighting different management zones - MapInfo GIS layers

 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
Conformity
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
Explanation

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

The Bristol Channel has the second largest tidal range in the world and has been the focus of many hydrodynamic studies. A recent study, Bristol Channel Marine Aggregates - Resources and Constraints (Posford Duvivier, 2000) contains comprehensive details of many aspects of the Bristol Channel, including: - Tides (range, flow patterns and residual currents) - Wind (directions and speeds) - Waves (height and direction) - Sediment distributions - Macrofauna distributions The Severn Estuary / Mor Hafren Shoreline Management Plan (Gifford Associated Consultants, 1998) also contains many detailed maps of many physical characteristics such as seabed sediments. No new studies have been carried out on these aspects for the preparation of the report. Data is unique and irreplaceable. Important operational and decision making data.
 

Keywords

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair
Keywords

NRW Thesaurus
  • Celtic Sea oil developments
  • Oil Pollution, Preparedness, Response and Co-Operation (OPRC)
  • oil pollution
  • feasibility study
  • Bristol Channel
  • oil contamination
  • oil dispersants
  • Oil Pollution Research Unit (OPRU)
  • marine biodiversity
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2025-01-08
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

SeaDataNet Parameter Discovery Vocabulary
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2024-06-19
Code
geonetwork.thesaurus.external.theme.rdf+xml

Allweddair
Keywords

IPSV Subjects List
  • Oil spillage
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2020-11-18
Code
geonetwork.thesaurus.external.theme.subjects
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

NRW Related Title

Feasibility study on the use of dispersants in the Bristol Channel in the event of an oil pollution incident
 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

This data is jointly owned by NRW and English Nature. There are no access restrictions to this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© CNC/NRW and English Nature 2002. There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and the copyright of NRW/ English Nature and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source.
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313133373637 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-03-03T14:39:25.57Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
pointOfContact
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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