4f4c4942-4343-5764-6473-313231383532 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-03-03T13:06:37.416Z NRW 1.0 wel British National Grid (EPSG::27700) National Coastal Erosion Risk Management (NCERM) National Coastal Erosion Risk Management (NCERM) Rheoli Risg Erydiad Arfordirol Cenedlaethol (NCERM) 2023-06-29 NRW_DS121852 The National Coastal Erosion Risk Management (NCERM) map shows the spatial NCERM coastal baseline. This baseline is split to 'frontages'. These are defined as lengths of coast with consistent characteristics based on the cliff behaviour characteristics and the defence characteristics. It is intended as an up-to-date and reliable benchmark dataset showing erosion extents and rates for three periods from a base date of 2005: - Short Term (0 - 20yr i.e. 2005 to 2025); - Medium Term (20 - 50yr i.e. 2025 to 2055); and - Long Term (50 - 100yr i.e. 2055 to 2105). The data extents are based on 50%ile confidence levels, whilst the data attributes highlight the 5-95%ile confidence range, of erosion predictions for the following two scenarios (NB All distances are cumulative over time and given in metres): - No Active Intervention Policy Scenario; and - With the implementation of Shoreline Management Plan 2 Policies. Defence type and SMP policies for each of the three periods described above are included. The National Coastal Erosion Risk Management (NCERM) map shows the spatial NCERM coastal baseline. This baseline is split to 'frontages'. These are defined as lengths of coast with consistent characteristics based on the cliff behaviour characteristics and the defence characteristics. It is intended as an up-to-date and reliable benchmark dataset showing erosion extents and rates for three periods from a base date of 2005: - Short Term (0 - 20yr i.e. 2005 to 2025); - Medium Term (20 - 50yr i.e. 2025 to 2055); and - Long Term (50 - 100yr i.e. 2055 to 2105). The data extents are based on 50%ile confidence levels, whilst the data attributes highlight the 5-95%ile confidence range, of erosion predictions for the following two scenarios (NB All distances are cumulative over time and given in metres): - No Active Intervention Policy Scenario; and - With the implementation of Shoreline Management Plan 2 Policies. Defence type and SMP policies for each of the three periods described above are included. Mae'r map Rheoli Risg Erydiad Arfordirol Cenedlaethol (NCERM) yn dangos gwaelodlin arfordirol ofodol NCERM. Mae'r waelodlin hon wedi'i rhannu’n ‘ffryntiadau’. Diffinnir y rhain fel darnau o arfordir sydd â nodweddion cyson yn seiliedig ar nodweddion ymddygiad clogwyni a'r nodweddion amddiffyn. Fe'i bwriedir fel set ddata meincnodi gyfredol a dibynadwy sy'n dangos graddfa a chyfraddau erydiad ar gyfer tri chyfnod o un dyddiad sylfaenol, sef 2005: Tymor Byr (0 – 20 mlynedd h.y. 2005 hyd 2025); Tymor Canolig (20 – 50 mlynedd h.y. 2025 hyd 2055); a Tymor Hir (50 – 100 mlynedd h.y. 2055 hyd 2105). Mae’r data ar raddfa’r erydiad yn seiliedig ar lefelau hyder o 50 canradd, ac mae gwerthoedd ar gael ar lefelau hyder o 5-95 canradd ar gyfer rhagfynegiadau erydiad yn y ddau senario isod (Noder – mae’r holl bellterau’n gronnus dros amser ac wedi’u nodi mewn metrau). Heb unrhyw bolisi ymyrraeth weithredol; a Gan weithredu Polisïau Cynllun Rheoli Traethlin 2. Mae polisïau math Amddiffyn a CRhT ar gyfer pob un o'r tri chyfnod a ddisgrifir uchod wedi'u cynnwys. Mae'r data a'r wybodaeth gysylltiedig wedi'u bwriadu at ddibenion cyfarwyddyd - ni all y rhain ddarparu manylion ar gyfer eiddo unigol. Mae gwybodaethNCERM yn ystyried y prif risg yn yr arfordir, er bod prosesau llifogydd ac erydiad yn aml yn gysylltiedig, ac nid yw data ar erydu nodweddion y blaendraeth yn cael eu cynnwys yn gyffredinol. Mae'r data yn disgrifio'r amcangyfrifon uchaf ac isaf o risg erydu mewn lleoliad penodol y disgwylir i leoliad gwirioneddol yr arfordir orwedd ynddo. Nid yw'r data yn amcangyfrif lleoliad absoliwt arfordir y dyfodol. Yn gyffredinol, nid yw manylion ardaloedd daearegol cymhleth, a elwir yn "glogwyni cymhleth", wedi'u cynnwys yn gyffredinol yn y set ddata oherwydd yr ansicrwydd cynhenid sy'n gysylltiedig â rhagfynegi amseriad a maint yr erydiad yn y lleoliadau hyn. 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 Natural risk zones GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme coastal erosion coastal floodplains COASTAL coast changes (coastal change) erosion rates NRW Thesaurus 2025-01-08 geonetwork.thesaurus.local.theme.converted_nrw-keywords Coastal geomorphology SeaDataNet Parameter Discovery Vocabulary 2024-06-19 geonetwork.thesaurus.external.theme.rdf+xml There are no access restrictions on this data. NRW may release, publish or disseminate it freely. no limitations © CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. 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. English environment SeaVoX Vertical Co-ordinate Coverages 2021-01-06 unknown Wales (WLS) -5.777741 -2.608865 51.240829 53.513067 SeaVoX Vertical Co-ordinate Coverages 2013-02-05 creation unknown 2012-01-01 2012-12-31 Geographic Information System ESRI Feature Class https://datamap.gov.wales/capabilities/layergroup/4142/?ows_service=wms OGC:WMS Web Mapping Service https://datamap.gov.wales/layergroups/geonode:nrw_ncerm WWW:LINK-1.0-http--link View and Download 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 The data and associated information is intended for guidance purposes - it cannot provide details for individual properties. The NCERM information considers the predominant risk at the coast, although flooding and erosion processes are often linked, and data on erosion of foreshore features are, in general, not included. The data describes the upper and lower estimates of erosion risk at a particular location, within which the actual location of the coastline is expected to lie. The data does not estimate the absolute location of the future coastline. Details of geologically complex areas, known as 'complex cliffs' are, in general, not included within the dataset due to the inherent uncertainties associated with predicting the timing and extent of erosion at these locations. The data and associated information is intended for guidance purposes - it cannot provide details for individual properties. The NCERM information considers the predominant risk at the coast, although flooding and erosion processes are often linked, and data on erosion of foreshore features are, in general, not included. The data describes the upper and lower estimates of erosion risk at a particular location, within which the actual location of the coastline is expected to lie. The data does not estimate the absolute location of the future coastline. Details of geologically complex areas, known as 'complex cliffs' are, in general, not included within the dataset due to the inherent uncertainties associated with predicting the timing and extent of erosion at these locations.