Groundwater Vulnerability (2018)

  • English
  • wel
  • All

Groundwater vulnerability maps reflect improvements in data mapping and understanding of the factors affecting vulnerability. The maps show the vulnerability of groundwater at a location based on the hydrological, geological, hydrogeological and soil properties within a 1 kilometre square grid. The maps provide a separate assessment of the vulnerability of groundwater in overlying 'superficial', rocks, and those that comprise the underlying 'bedrock'. The main aim of the maps is as a high level screening tool to give NRW, planners, consultants and other users an indication of whether a proposed development or activity is likely to be acceptable (e.g. located in an area of low vulnerability or over unproductive strata) or of potential concern (e.g. located in an area of high vulnerability). The maps can also be used to inform and target environmental management and incident response so that preventative and/or remedial actions can be taken as early as possible to protect groundwater. Two main rock types are recognised: - Superficial (drift): permeable unconsolidated (loose) deposits, such as sands and gravels. - Bedrock: solid permeable formations such as sandstone, chalk and limestone. The vulnerability of these two rock types may differ due to their structure and location. Where both types are present, the maps display the most vulnerable category of the two.

Identification

Dynodydd
Identifier
NRW_DS120494
Teitl Amgen
Alternative Title
  • Simplified Groundwater Vulnerability
  • Combined Groundwater Vulnerability
Laith Metadata
Metadata Language
English
Lineage

For the first time the maps provide a separate assessment of the vulnerability of groundwater in overlying (or 'superficial') rocks and those that comprise the underlying 'bedrock'. Previously only bedrock was assessed. Some rock types have been reclassified from non-aquifers to secondary aquifers in recognition of their importance for local water supplies and baseflow to rivers. The maps identify areas where solution features that enable rapid movement of a contaminant may be present and show where NRW hold local information that would affect vulnerability in that area. These changes have resulted in an increase in the area of land that is considered to require protection and an increase in the area that is more vulnerable.
Additional Information

The aquifer designation data used in the new maps is based on geological mapping provided by the British Geological Survey. The maps also include Soil Map data licensed from Cranfield University.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2021-07-07
Perchennog
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Perchennog
Owner
  British Geological Survey (BGS)
British Geological Survey (BGS), Central Enquiries, Kingsley Dunham Centre, Keyworth, Nottingham, NG12 5GG
http://www.bgs.ac.uk/
Cychwynnwr
Originator
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 

Extent

Extent

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


 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Geographic Information System ()

    Specification

    ArcMap feature class

 

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
Degree
false
Lineage

For the first time the maps provide a separate assessment of the vulnerability of groundwater in overlying (or 'superficial') rocks and those that comprise the underlying 'bedrock'. Previously only bedrock was assessed. Some rock types have been reclassified from non-aquifers to secondary aquifers in recognition of their importance for local water supplies and baseflow to rivers. The maps identify areas where solution features that enable rapid movement of a contaminant may be present and show where NRW hold local information that would affect vulnerability in that area. These changes have resulted in an increase in the area of land that is considered to require protection and an increase in the area that is more vulnerable.
 

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
  • groundwater pollution
  • groundwater
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

 

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 BGS There are no access restrictions on this data. However, there are third party use restrictions.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

NRW does NOT grant permission to third parties to re-use or disseminate this dataset. In some cases the dataset maybe made available for non-commercial purposes . For commercial use please contact the British Geological Survey.
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313230343934 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-05-30T14:08:36.955Z
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

Access the portal