Groundwater Vulnerability (2018)
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
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS120494
- Alternative Title
-
- Simplified Groundwater Vulnerability
- Combined Groundwater Vulnerability
- 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.
- Dataset Reference Date (Publication)
- 2021-07-07
Temporal Extent
- Begin date
- 2018-01-01
- End date
- 2018-02-01
- Topic category
-
- Geoscientific information
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Distribution
- Format Type and Description
-
-
Geographic Information System
()
- Specification
-
ArcMap feature class
-
Geographic Information System
()
Quality
Data quality
- Quality Scope
- Dataset
- 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
Keywords
Keywords
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- 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
- Use constraints type
- 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
- File Identifier
- 4f4c4942-4343-5764-6473-313230343934 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-05-30T14:08:36.955Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0