Compliance Assessment of Welsh River SACs against Phosphorus Targets
Asesiad o gydymffurfiaeth Ardaloedd Cadwraeth Arbennig afonydd Cymru yn erbyn targedau ffosfforws

  • English
  • wel
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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.

Mae diwygiadau i ganllawiau monitro'r Cydbwyllgor Cadwraeth Natur wedi’i gwneud yn ofynnol i Cyfoeth Naturiol Cymru (CNC) adolygu ei amcanion cadwraeth ar gyfer Ardaloedd Cadwraeth Arbennig sy’n seiliedig ar afonydd yng Nghymru, yn enwedig o ran ffosfforws, lle mae'r targedau wedi'u tynhau'n sylweddol. Crëwyd y data hwn i nodi cydymffurfiaeth â'r targedau ffosfforws diwygiedig ar gyfer Ardaloedd Cadwraeth Arbennig sy’n seiliedig ar afonydd yng Nghymru. Tynnwyd data crynodiad ffosfforws o gronfa ddata ansawdd dŵr CNC am gyfnod o dair blynedd rhwng Ionawr 2017 a Rhagfyr 2019 ar gyfer yr holl bwyntiau sampl o fewn cyrff dŵr yn y naw Ardal Cadwraeth Arbennig a ddynodwyd ar gyfer un neu fwy o nodweddion afon. Datganiad priodoli Yn cynnwys gwybodaeth Cyfoeth Naturiol Cymru © Cyfoeth Naturiol Cymru a Hawl Cronfa Ddata. Cedwir pob hawl. Yn cynnwys data Arolwg Ordnans. Rhif Trwydded Arolwg Ordnans AC0000849444. Hawlfraint y Goron a Hawl Cronfa Ddata.

Identification

Dynodydd
Identifier
NRW_DS124865
Teitl Amgen
Alternative Title
  • Phosphorus Sensitive SAC Freshwater Catchments.lyr
  • Compliance with NRW River SAC Phosphorus Targets 2017-19 by Catchment Waterbodies.lyr
Laith Metadata
Metadata Language
English
Lineage

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

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)
Dataset Reference Date (Publication)
2023-02-22

Temporal Extent

Begin date
2017-01-01
End date
2022-08-19
 
Categori pwnc
Topic category
  • Environment
    Environment
  • Inland waters
    Inland waters
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 

Extent

Extent

Hyd
Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

Dosbarthiad
Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Delimited ( )

    Specification

    Excel spreadsheets with summary data

  • Geographic Information System ( )

    Specification

    ESRI Feature Class

  • Documents ( )

    Specification

    Digital versions of the report: Microsoft Word document(s); and an equivalent Adobe Portable Document Format version.

Lleolwr Adnoddau
Resource Locator
View and Download ( WWW:LINK-1.0-http--link )
Lleolwr Adnoddau
Resource Locator
Web Mapping Service ( OGC:WMS )
 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
Conformity
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
Explanation

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

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

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair
Keywords

NRW Thesaurus
  • phosphorus
  • river Cleddau
  • river Gwyrfai (afon Gwyrfai)
  • river Teifi (Afon Teifi)
  • River Eden
  • river Glaslyn (afon Glaslyn)
  • Habitats Directive (Directive 92/43/EEC) (EC Habitats Directive) (European Community Habitats Directive)
  • river Dee (afon Dyfrdwy)
  • River Usk
  • River Wye (Afon Gwy)
  • Special Areas of Conservation (SAC) - SAC monitoring
  • rivers (see also specific river names)
  • river Tywi (afon Tywi)
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2024-06-19
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© 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

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number AC0000849444. Crown Copyright and Database Right.
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313234383635 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-10-19T08:26:09.739Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
pointOfContact
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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