4f4c4942-4343-5764-6473-313235373037 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2025-03-05T15:46:24.646Z NRW 1.0 wel British National Grid (EPSG:27700) Compliance Assessment of Welsh River Special Areas of Conservation (SACs) Against Water Quality Targets Associated Data (2017-2019) Compliance Assessment of Welsh River Special Areas of Conservation (SACs) Against Water Quality Targets Associated Data (2017-2019) Asesiad Cydymffurfiaeth Ardaloedd Cadwraeth Arbennig (ACAau) Afonydd Cymru yn erbyn Targedau Ansawdd Dŵr (2017-2019) 2024-01-11 NRW_DS125707 These data identify the compliance of Welsh river Special Areas of Conservation (SACs) regarding targets for seven water quality attributes: Dissolved Oxygen, Biochemical Oxygen Demand, Total Ammonia, Unionised Ammonia, Trophic Diatom Index, pH and Acid Neutralising Capacity. The targets and methods of assessment are set at a UK level by the Joint Nature Conservation Committee as published in the Common Standards Guidance for Rivers 2016, and form part of the conservation objectives for the riverine SAC features. There are nine SACs in Wales with riverine features (known in their respective Core Management Plans as): • River Dee and Bala Lake • Afon Gwyrfai a Llyn Cwellyn • Coedydd Derw a Safleoedd Ystlumod Meirion (Afon Glaslyn) • Afon Eden - Cors Goch Trawsfynydd • Afon Teifi • Afonydd Cleddau • Afon Tywi • River Usk • River Wye For the purposes of water quality reporting, Natural Resources Wales (NRW) divides rivers into units called water bodies. A total of 119 (of a possible 127) water bodies, each with a single sampling point, were assessed for one or more attribute. Water quality data collected by NRW’s routine surveillance monitoring programme for a three-year period (1st of January 2017 – 31st December 2019) were extracted from the NRW water quality database (KiWQM) to assess compliance with targets. Data were not available for all attributes for all water bodies due to the risk-based design of NRW’s monitoring programmes. The majority of water bodies were assessed for more than one attribute. All data were subject to robust quality assurance processes. The data consists of two products: 1. An Excel spreadsheet summarising results and 2. GIS layers consisting of the WFD catchment area water bodies, clipped to the Welsh border and excluding water bodies not overlapping with river SAC boundaries. These data identify the compliance of Welsh river Special Areas of Conservation (SACs) regarding targets for seven water quality attributes: Dissolved Oxygen, Biochemical Oxygen Demand, Total Ammonia, Unionised Ammonia, Trophic Diatom Index, pH and Acid Neutralising Capacity. The targets and methods of assessment are set at a UK level by the Joint Nature Conservation Committee as published in the Common Standards Guidance for Rivers 2016, and form part of the conservation objectives for the riverine SAC features. There are nine SACs in Wales with riverine features (known in their respective Core Management Plans as): • River Dee and Bala Lake • Afon Gwyrfai a Llyn Cwellyn • Coedydd Derw a Safleoedd Ystlumod Meirion (Afon Glaslyn) • Afon Eden - Cors Goch Trawsfynydd • Afon Teifi • Afonydd Cleddau • Afon Tywi • River Usk • River Wye For the purposes of water quality reporting, Natural Resources Wales (NRW) divides rivers into units called water bodies. A total of 119 (of a possible 127) water bodies, each with a single sampling point, were assessed for one or more attribute. Water quality data collected by NRW’s routine surveillance monitoring programme for a three-year period (1st of January 2017 – 31st December 2019) were extracted from the NRW water quality database (KiWQM) to assess compliance with targets. Data were not available for all attributes for all water bodies due to the risk-based design of NRW’s monitoring programmes. The majority of water bodies were assessed for more than one attribute. All data were subject to robust quality assurance processes. The data consists of two products: 1. An Excel spreadsheet summarising results and 2. GIS layers consisting of the WFD catchment area water bodies, clipped to the Welsh border and excluding water bodies not overlapping with river SAC boundaries. Mae’r data hwn yn pennu cydymffurfiaeth Ardaloedd Cadwraeth Arbennig (ACA) afonydd Cymru o ran targedau ar gyfer saith nodwedd ansawdd dŵr: Ocsigen Tawdd, Y Galw Biocemegol am Ocsigen, Cyfanswm yr Amonia, Amonia Heb ei Ïoneiddio, Mynegai Diatomau Troffig, pH a’r Gallu i Niwtralu Asidau. Mae’r targedau a’r dulliau asesu wedi’u pennu ar lefel y DU gan y Cyd-bwyllgor Cadwraeth Natur fel y’u cyhoeddwyd yn y ‘Common Standards Guidance for Rivers 2016’, ac maent yn rhan o’r amcanion cadwraeth ar gyfer nodweddion afonol ACAau. Mae naw ACA yng Nghymru sydd â nodweddion afonol (a elwir yn eu Cynlluniau Rheoli Craidd priodol fel a ganlyn): Afon Dyfrdwy a Llyn Tegid Afon Gwyrfai a Llyn Cwellyn Coedydd Derw a Safleoedd Ystlumod Meirion (Afon Glaslyn) Afon Eden - Cors Goch Trawsfynydd Afon Teifi Afonydd Cleddau Afon Tywi Afon Wysg Afon Gwy At ddibenion adrodd ar ansawdd dŵr, mae Cyfoeth Naturiol Cymru (CNC) yn rhannu afonydd yn unedau a elwir yn gyrff dŵr. Aseswyd cyfanswm o 119 o gyrff dŵr (allan o 127 posibl), pob un ag un pwynt samplu, ar gyfer un nodwedd neu fwy. Cafodd data ansawdd dŵr a gasglwyd gan raglen monitro gwyliadwriaeth arferol CNC am gyfnod o dair blynedd (1 Ionawr 2017 - 31 Rhagfyr 2019) ei dynnu o gronfa ddata ansawdd dŵr (KiWQM) CNC er mwyn asesu cydymffurfiaeth â thargedau. Nid oedd data ar gael yn achos pob nodwedd ar gyfer pob corff dŵr oherwydd cynllun seiliedig ar risg rhaglenni monitro CNC. Aseswyd y rhan fwyaf o gyrff dŵr ar gyfer mwy nag un nodwedd. Roedd yr holl ddata yn destun prosesau sicrhau ansawdd cadarn. Defnyddiwyd methodolegau casglu a dadansoddi data yn unol â chanllawiau safonol CNC. Mae’r dulliau llawn wedi’u cyflwyno yn yr adroddiad atodol. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Hydrography GEMET - INSPIRE themes, version 1.0 GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Water Quality Assessment NRW Thesaurus NRW Thesaurus 2025-01-08 geonetwork.thesaurus.local.theme.converted_nrw-keywords SeaDataNet Parameter Discovery Vocabulary SeaDataNet Parameter Discovery Vocabulary 2024-06-19 geonetwork.thesaurus.external.theme.rdf+xml Water quality IPSV Subjects List IPSV Subjects List 2020-11-18 geonetwork.thesaurus.external.theme.subjects NRW SMNR Keywords NRW SMNR Keywords 2024-06-26 geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords There are no access restrictions on this data. NRW may release, publish or disseminate it freely. no limitations © 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. 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. Open Government Licence English environment SeaVoX Vertical Co-ordinate Coverages SeaVoX Vertical Co-ordinate Coverages 2021-01-06 Wales (WLS) -5.777741 -2.608865 51.240829 53.513067 2017-01-01 2019-12-12 Foster H., Jones T.G, Jâms, I.B., Hatton-Ellis T.W. 2024. Compliance Assessment of Welsh River SACs Against Water Quality Targets. NRW Evidence Report No: 729, 106pp, Natural Resources Wales, Bangor. Database [A] NRW Evidence Report in either Pdf or Word Format https://datamap.gov.wales/layergroups/geonode:nrw_sac_rivers_project WWW:LINK-1.0-http--link View and Download Data https://datamap.gov.wales/capabilities/layergroup/5941/?ows_service=wms OGC:WMS Web Mapping Service 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 2010-12-08 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false Data extracted from NRW KiWQM database. Data collection and analysis methodologies undertaken in line with NRW’s standard guidance. All data were subject to robust quality assurance processes. Full methods are presented in the accompanying report. Data extracted from NRW KiWQM database. Data collection and analysis methodologies undertaken in line with NRW’s standard guidance. All data were subject to robust quality assurance processes. Full methods are presented in the accompanying report.