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.
- Dull adnabod
- Rhychwant
- Dosbarthiad
- Ansawdd
- Allweddeiriau
- System Cyfeirio Gofodol
- Cynnwys
- Cyfyngiadau
- Cynnal a chadw
- Metadata
Dull adnabod
- Dynodydd
- NRW_DS124865
- Teitl Amgen
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- Phosphorus Sensitive SAC Freshwater Catchments.lyr
- Compliance with NRW River SAC Phosphorus Targets 2017-19 by Catchment Waterbodies.lyr
- Laith Metadata
- English
- Datganiad
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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
- Gwybodaeth ychwanegol
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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
- Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
- 2023-02-22
Ystod amser
- Dyddiad cychwyn
- 2017-01-01
- Dyddiad gorffen
- 2022-08-19
- Categori pwnc
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- Environment
- Inland waters
Rhychwant
Rhychwant
- Hyd
- Wales (WLS)
))
Dosbarthiad
Dosbarthiad
- Fformat - Math a Disgrifiad
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Delimited
()
- Math
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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
()
- Lleolwr Adnoddau
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Download data and Web Service
World Wide Web page
- Lleolwr Adnoddau
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Web Mapping Service
World Wide Web page
Ansawdd
Ansawdd Data
- Cwmpas Ansawdd
- Dataset
- Datganiad
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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
Allweddeiriau
Allweddair
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2008-06-01
Allweddair
- 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)
- Math
- Theme
Dyfyniad
- Dyddiad (Cyhoeddiad)
- 2023-12-31
System Cyfeirio Gofodol
Cynnwys
Gwybodaeth Cynnwys
Proffil CNC
Elfennau CNC
Cyfyngiadau
Cyfyngiadau
Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus
- Math o Gyfyngiad
- Other restrictions
Cyfarwyddeb Cyfyngiadau Mynediad
- Cyfyngiadau
- no limitations
Testun cyfyngiadau mynediad
- Cyfyngiadau eraill
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There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Defnyddiwch gyfyngiadau
- Cyfyngiadau Defnyddio
- Other restrictions
- Cyfyngiadau eraill
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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.
Datganiad Priodoli
- Cyfyngiadau eraill
- Open Government Licence (OGL)
Math o Drwydded
- Cyfyngiadau eraill
- Open Government Licence (OGL)
Metadata
Metadata
- Dynodydd Ffeil
- 4f4c4942-4343-5764-6473-313234383635 XML
- Laith Metadata
- English
- Math o adnodd
- Dataset
- Dyddiad Metadata
- 2024-05-30T15:37:34.608Z
- Enw Safonol Metadata
- NRW
- Fersiwn Metadata
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