Compliance Assessment of Welsh River SACs against Phosphorus Targets
Revisions to Joint Nature Conservation Committee (JNCC) monitoring guidance have required Natural Resources Wales (NRW) to review its conservation objectives for river Special Areas of Conservation (SACs) in Wales, notably with respect to phosphorus where targets have been substantially tightened. This data was created to identify compliance with the revised phosphorus targets for Welsh river SACs. Phosphorus concentration data were extracted from the NRW water quality database (KiWQM), for a three-year period from January 2017 to December 2019 for all sample points within water bodies in the nine SACs designated for one or more river features. These were Afon Gwyrfai a Llyn Cwellyn; Afon Eden – Cors Goch Trawsfynydd; Meirionnydd Oakwoods (Afon Glaslyn); Afon Teifi; Afon Tywi; Afonydd Cleddau; River Dee & Llyn Tegid; River Usk; and River Wye. In total, 125 water bodies (river sections) were in scope. Data were excluded where (i) detection limits were inadequate to assess compliance with the target or (ii) where the sample exceeded the recommended holding time of three days prior to analysis. Outliers in the data were identified and, if they were considered likely to be causing a failure on their own, data from other nutrient pollution indicators (biochemical oxygen demand, nitrate and ammonia) were checked to corroborate possible pollution events. The data consists of two products: 1. An Excel spreadsheet summarising results and 2. An ArcGIS layer consisting of the WFD catchment area water bodies, clipped to the Welsh border and excluding water bodies not overlapping with river SAC boundaries.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS124865
- Alternative Title
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- Phosphorus Sensitive SAC Freshwater Catchments.lyr
- Compliance with NRW River SAC Phosphorus Targets 2017-19 by Catchment Waterbodies.lyr
- Metadata Language
- English
- Lineage
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1. Summarised from NRW KiWQM database; 2. WFD water bodies catchment layer on X drive. 3. The data was updated in June 2022 to correct mistakes in the original version
- Additional Information
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Hatton-Ellis TW, Jones TG. 2020. Compliance Assessment of Welsh River SACs against Phosphorus Targets. NRW Evidence Report No: 489, 95pp, Natural Resources Wales, Bangor
- Dataset Reference Date (Publication)
- 2023-02-22
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Distribution
Distribution
- Format Type and Description
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Delimited
()
- Specification
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[A] Digital versions of the report: Microsoft Word document(s); and an equivalent Adobe Portable Document Format version. [B] Excel spreadsheets with summary data. [C] ESRI Feature Class
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Delimited
()
- Resource Locator
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Download data and Web Service
World Wide Web page
- Resource Locator
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Web Mapping Service
World Wide Web page
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
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1. Summarised from NRW KiWQM database; 2. WFD water bodies catchment layer on X drive. 3. The data was updated in June 2022 to correct mistakes in the original version
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
- NRW Thesaurus
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- phosphorus
- Special Areas of Conservation (SAC) - SAC monitoring
- rivers (see also specific river names)
- River Wye (Afon Gwy)
- River Usk
- river Tywi (afon Tywi)
- river Gwyrfai (afon Gwyrfai)
- river Glaslyn (afon Glaslyn)
- river Dee (afon Dyfrdwy)
- River Eden
- river Teifi (Afon Teifi)
- river Cleddau
- Habitats Directive (Directive 92/43/EEC) (EC Habitats Directive) (European Community Habitats 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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There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
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© CNC/NRW All rights Reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number AC0000849444. Crown Copyright and Database Right. Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and copyright of the owners. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
Attribution Statement
- Other constraints
- Open Government Licence (OGL)
Licence
- Other constraints
- Open Government Licence (OGL)
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-313234383635 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-05-30T15:37:34.608Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
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1.0