4f4c4942-4343-5764-6473-313139313333 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2025-02-04T10:16:46.701Z NRW 1.0 wel British National Grid (EPSG::27700) Water Framework Directive (WFD) River Waterbody Catchments Cycle 1 Water Framework Directive (WFD) River Waterbody Catchments Cycle 1 Dalgylchoedd Cyrff Dŵr Afonol y Gyfarwyddeb Fframwaith Dŵr – Cylchred 1 river catchments.LYR 2013-12-31 NRW_DS119133 The 'WFD River Waterbody Catchments' are a polygon Shapefile dataset collated as defined for the implementation of the Water Framework Directive. Catchments are defined as an area of land from which all surface run-off flows through a series of streams, rivers and, possibly, lakes to a particular point in the water course such as a river confluence. Delineation of the river catchment boundaries primarily utilised the CEH Flow Grid hydrological model run with CEH Integrated Hydrological Digital Terrain Model (IHDTM) data so as to determine water drainage into river stretches. Upstream catchment size was calculated within an ESRI GIS environment using the extension Arc Hydro. The 'WFD River Waterbody Catchments' are a polygon Shapefile dataset collated as defined for the implementation of the Water Framework Directive. Catchments are defined as an area of land from which all surface run-off flows through a series of streams, rivers and, possibly, lakes to a particular point in the water course such as a river confluence. Delineation of the river catchment boundaries primarily utilised the CEH Flow Grid hydrological model run with CEH Integrated Hydrological Digital Terrain Model (IHDTM) data so as to determine water drainage into river stretches. Upstream catchment size was calculated within an ESRI GIS environment using the extension Arc Hydro. Mae 'Dalgylchoedd Cyrff Dŵr Afon y Gyfarwyddeb Fframwaith Dŵr' yn set ddata Shapefile polygon yw sydd wedi'i chasglu fel y diffiniwyd ar gyfer gweithredu'r Gyfarwyddeb Fframwaith Dŵr. Caiff dalgylchoedd eu diffinio fel darn o dir lle y mae'r holl dŵr ffo arwyneb yn llifo trwy gyfres o nentydd, afonydd ac, o bosibl, llynnoedd i bwynt penodol yn y cwrs dŵr, megis cydlifiad afon. Roedd ffiniau dalgylchoedd afonydd yn cael eu dynodi trwy ddefnyddio model hydrolegol Grid Llif CEH yn bennaf, ochr yn ochr â data Model Tir Digidol Hydrolegol Integredig CEH, er mwyn pennu faint o ddŵr oedd yn draenio i mewn i hydoedd afonydd. Cyfrifwyd maint y dalgylch i fyny'r afon o fewn amgylchedd GIS ESRI gan ddefnyddio'r estyniad Arc Hydro. Datganiad priodoli Yn cynnwys gwybodaeth Cyfoeth Naturiol Cymru © Cyfoeth Naturiol Cymru a Chronfa Ddata Hawl. Cedwir pob hawl. Rhai nodweddion o'r wybodaeth hon yn seiliedig ar ddata gofodol digidol a drwyddedwyd oddi wrth y Ganolfan Ecoleg a Hydroleg © NERC (CEH). Yn cynnwys data Arolwg Ordnans © Hawlfraint y Goron a hawl cronfa ddata 2015. 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 Area management/restriction/regulation zones and reporting units GEMET - INSPIRE themes, version 1.0 GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Water Framework Directive (WFD) NRW Thesaurus NRW Thesaurus 2024-06-19 geonetwork.thesaurus.local.theme.converted_nrw-keywords SeaDataNet Parameter Discovery Vocabulary SeaDataNet Parameter Discovery Vocabulary 2024-06-19 geonetwork.thesaurus.external.theme.rdf+xml 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 This data is jointly owned by NRW and CEH There are no access restrictions on this data. NRW may release, publish or disseminate it freely. no limitations © CNC/NRW. Some features of this information are based on digital spatial data licensed from the Centre for Ecology & Hydrology © NERC (CEH). Contains OS data © 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. Some features of this information are based on digital spatial data licensed from the Centre for Ecology & Hydrology © NERC (CEH). Contains OS data © Crown copyright and database right 2015. English inlandWaters SeaVoX Vertical Co-ordinate Coverages SeaVoX Vertical Co-ordinate Coverages 2021-01-06 Wales (WLS) -5.777741 -2.608865 51.240829 53.513067 2008-01-01 2013-12-31 Geographic Information System ESRI Format https://datamap.gov.wales/layers/inspire-nrw:NRW_WFD_RIVERCATCHMENT_C1 WWW:LINK-1.0-http--link View and Download https://datamap.gov.wales/capabilities/layer/560/?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 Delineation of the river catchment boundaries primarily utilised the CEH Flow Grid hydrological model run with CEH Integrated Hydrological Digital Terrain Model (IHDTM) data so as to determine water drainage into river stretches. Upstream catchment size was calculated within an ESRI GIS environment using the extension Arc Hydro. Delineation of the river catchment boundaries primarily utilised the CEH Flow Grid hydrological model run with CEH Integrated Hydrological Digital Terrain Model (IHDTM) data so as to determine water drainage into river stretches. Upstream catchment size was calculated within an ESRI GIS environment using the extension Arc Hydro.