Aquifer Designation
Aquifer designation consists of two datasets. These are NRW Aquifer topology superficial [Aquifer Designation Superficial Deposits] and NRW Aquifer topology bedrock [Aquifer Designation Bedrock Geology]. Aquifer designations identify the potential of the geological strata to provide water that can be abstract and have been defined through the assessment of the underlying geology. The designations are attributed directly to British Geological Society (BGS) 1:50K. Bedrock geology (formerly known as 'solid' geology by BGS) is a term used for the main mass of rocks forming the Earth and present everywhere, whether exposed at the surface in outcrops or concealed beneath superficial deposits or water. Geology less than 1.8 million years in age are referred to as Superficial Deposits. Superficial deposits are the youngest geological deposits formed during the most recent period of geological time, the Quaternary, which extends back about 1.8 million years from the present. They rest on older deposits or rocks referred to as Bedrock.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS116698
- Alternative Title
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- NRW Aquifer topology bedrock.LYR
- NRW Aquifer topology superficial.LYR
- NRW Aquifer topology superficial
- NRW Aquifer topology bedrock
- Aquifer Designation Map (Bedrock Geology) (AfA125)
- Aquifer Designation Map (Superficial Deposits) (AfA124)
- Metadata Language
- English
- Lineage
-
The aquifer designations are: Principal Aquifers: geology that exhibit high irregular and/or fracture permeability. They usually provide a high level of water storage. They may support water supply and/or river base flow on a strategic scale; Secondary Aquifers A: permeable strata capable of supporting water supplies at a local rather than strategic scale and in some cases forming an important source of base flow to rivers; Secondary Aquifer B: predominantly lower permeability strata which may in part have the ability to store and yield limited amounts of groundwater by virtue of localised features such as fissures, thin permeable horizons and weathering; Secondary Undifferentiated: In cases where it has not been possible to attribute either category A or B to a rock type; Unproductive Strata: these are geological strata with low permeability that have negligible significance for water supply or river base flow. Unknown: Lakes and Landslips.
- Dataset Reference Date (Publication)
- 2021-07-07
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Distribution
- Format Type and Description
-
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Geographic Information System
()
- Specification
-
ESRI Feature Class
-
Geographic Information System
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
-
The aquifer designations are: Principal Aquifers: geology that exhibit high irregular and/or fracture permeability. They usually provide a high level of water storage. They may support water supply and/or river base flow on a strategic scale; Secondary Aquifers A: permeable strata capable of supporting water supplies at a local rather than strategic scale and in some cases forming an important source of base flow to rivers; Secondary Aquifer B: predominantly lower permeability strata which may in part have the ability to store and yield limited amounts of groundwater by virtue of localised features such as fissures, thin permeable horizons and weathering; Secondary Undifferentiated: In cases where it has not been possible to attribute either category A or B to a rock type; Unproductive Strata: these are geological strata with low permeability that have negligible significance for water supply or river base flow. Unknown: Lakes and Landslips.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- Type
- Theme
Citation
- Date (Revision)
- 2013-04-03
Spatial Reference System
- Code
- NONE
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
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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
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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
- 4f4c4942-4343-5764-6473-313136363938 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-05-30T15:37:28.516Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0