Nutrient Review - Risk Maps
Surface water and groundwater risk maps created by combining current and future interpolated nitrate and phosphate surface water and concentrations and the nitrate and phosphate leachate concentrations. Each component was assessed using a scoring and weighting system, and the scores were combined to generate a national risk map for nitrate at a scale of 1 km2.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS125602
- Alternative Title
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- Surface Water Nitrate Risk Map.lyr
- Metadata Language
- English
- Lineage
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Broadly following the approach used for the 2016 review of groundwater NVZs, a GIS-based risk model was used to determine potential risks to surface and groundwater from phosphate/nitrate. The risk model combines national datasets of current and future phosphate/nitrate surface and groundwater concentrations and the leaching models. Each component is assessed using a scoring and weighting system, and the scores are combined to generate a national risk map for phosphate at a 1 km square grid scale. Areas with higher scores indicate potential risk to groundwater from phosphate. The risk model comprises three components derived using national monitoring and land use datasets. Each component was given a score and weightings were applied to these scores. The weighted scores were then combined to yield an overall risk score indicating the strength of evidence that the surface and groundwater is polluted by phosphate/nitrate from modelled land use diffuse sources. The scores and weighting applied are similar to those used for the 2016 review of groundwater NVZs. The GIS model was used to divide Wales into 1km grid squares. The weighted scores for each of the risk components were assigned to each grid square and summed to provide a total risk score to produce a national risk map for phosphate/nitrate.
- Topic category
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- Environment
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Distribution
- Format Type and Description
-
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Geographic Information System
Geographic Information System
()
- Specification
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ESRI Feature Class
-
Geographic Information System
Geographic Information System
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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Broadly following the approach used for the 2016 review of groundwater NVZs, a GIS-based risk model was used to determine potential risks to surface and groundwater from phosphate/nitrate. The risk model combines national datasets of current and future phosphate/nitrate surface and groundwater concentrations and the leaching models. Each component is assessed using a scoring and weighting system, and the scores are combined to generate a national risk map for phosphate at a 1 km square grid scale. Areas with higher scores indicate potential risk to groundwater from phosphate. The risk model comprises three components derived using national monitoring and land use datasets. Each component was given a score and weightings were applied to these scores. The weighted scores were then combined to yield an overall risk score indicating the strength of evidence that the surface and groundwater is polluted by phosphate/nitrate from modelled land use diffuse sources. The scores and weighting applied are similar to those used for the 2016 review of groundwater NVZs. The GIS model was used to divide Wales into 1km grid squares. The weighted scores for each of the risk components were assigned to each grid square and summed to provide a total risk score to produce a national risk map for phosphate/nitrate.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- nitrates (nitrogen)
- phosphates
- nutrients
- phosphorus
- nutrient pollution
- Nitrate directive
- Type
- Theme
Citation
- Date (Publication)
- 2023-12-31
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
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Restriction on this data have not been fully determined, however a preliminary assessment indicate part of this dataset is sensitive, and access may be restricted under relevant legislation. NRW may NOT release, publish or disseminate the sensitive data
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© CNC/NRW NRW does NOT grant permission to third parties to re-use or disseminate the full dataset. Subject to a full assessment, a redacted version of the data may be re-used under provision and in line with the terms of a NRW licence.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313235363032 XML
- Metadata Language
- English
- Parent Identifier
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Nutrients Review 2023
NRW_DS125601
- Resource type
- Dataset
- Metadata Date
- 2024-05-30T15:37:27.265Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0