4f4c4942-4343-5764-6473-313134353634 English Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2024-12-09T14:38:10.453Z NRW 1.0 wel Latitude and Longitude (EPSG::4326) Morphodynamic Modelled Outputs for the Mawddach Estuary Morphodynamic Modelled Outputs for the Mawddach Estuary Canlyniadau ar sail model morffodynamig ar gyfer Aber Mawddach Development of a morphodynamic model of the Mawddach Estuary to inform future management decisions 2011-06-30 NRW_DS114564 This report summarises the third stage of a modelling research study undertaken by Bangor University, investigating the hydrodynamic and morphodynamic response of representative Welsh estuaries (which include both past and potential future changes to the estuaries, as well as their present form) to a range of mean and extreme climatic conditions. In particular, coastal flood risk and potential for erosion and accretion has been assessed through the medium of high resolution computational models. The Mawddach estuary lies within the Snowdonia National Park, north Wales, and its landscape and environment represents one of the key natural assets which Wales possesses. The purpose of this data capture was to investigate the response of the estuary to future tidal and atmospheric changes. The model has also been used to investigate the response of the estuarine dynamics to potential management strategies such as embankment re-alignment and re-location. This report summarises the third stage of a modelling research study undertaken by Bangor University, investigating the hydrodynamic and morphodynamic response of representative Welsh estuaries (which include both past and potential future changes to the estuaries, as well as their present form) to a range of mean and extreme climatic conditions. In particular, coastal flood risk and potential for erosion and accretion has been assessed through the medium of high resolution computational models. The Mawddach estuary lies within the Snowdonia National Park, north Wales, and its landscape and environment represents one of the key natural assets which Wales possesses. The purpose of this data capture was to investigate the response of the estuary to future tidal and atmospheric changes. The model has also been used to investigate the response of the estuarine dynamics to potential management strategies such as embankment re-alignment and re-location. Centre for Applied Marine Sciences (CAMS) Centre for Applied Marine Sciences, Marine Science Laboratories, Bangor University, Menai Bridge, Ynys Mon, LL59 5AB enquiries@cams.bangor.ac.uk http://www.cams.bangor.ac.uk/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Centre for Applied Marine Sciences (CAMS) Centre for Applied Marine Sciences, Marine Science Laboratories, Bangor University, Menai Bridge, Ynys Mon, LL59 5AB enquiries@cams.bangor.ac.uk http://www.cams.bangor.ac.uk/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Centre for Applied Marine Sciences (CAMS) Centre for Applied Marine Sciences, Marine Science Laboratories, Bangor University, Menai Bridge, Ynys Mon, LL59 5AB enquiries@cams.bangor.ac.uk http://www.cams.bangor.ac.uk/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Elevation Elevation GEMET - INSPIRE themes, version 1.0 GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme modelling Mawddach Estuary morphodynamics TELEMAC NRW Thesaurus NRW Thesaurus 2023-12-31 geonetwork.thesaurus.local.theme.converted_nrw-keywords Coastal geomorphology Bathymetry and Elevation SeaDataNet Parameter Discovery Vocabulary SeaDataNet Parameter Discovery Vocabulary 2021-01-06 geonetwork.thesaurus.external.theme.rdf+xml This data is jointly owned by NRW and the Centre for Applied Marine Sciences (CAMS). There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations © CNC/NRW and CAMS 2011 There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and the copyright of NRW/CAMS and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source. 10.0 English elevation SeaVoX Vertical Co-ordinate Coverages SeaVoX Vertical Co-ordinate Coverages 2021-01-06 water column GWYNEDD - GWYNEDD -4.09321189 -3.90952571 52.6741221 52.7704157 1977-01-01 2010-12-31 10 -20 Documents [A] Report in word and pdf format. [B] Modelled output grid files in .r2d format 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 false A mathematical model of the Mawddach Estuary has been developed to reproduce the interactions of tidal and fresh water hydrodynamics within the estuary and surrounding low lying areas. The model is based on a TELEMAC Modelling System which calculates the temporal and spatial variations in hydrodynamics (e.g. elevations, velocities, pressure, density) and sediment transport through a finite-element model grid (an unstructured mesh of nodes connected in a triangular framework) which represents the bathymetry of the area. Input data to the model includes bathymetric data from Admiralty charts and LIDAR data. Three grids have been produced against which different scenarios can be modelled. 1) 2-D model of the present day Mawddach Estuary 2) Alterations to represent the past and future 3) Alterations to remove the embankments upstream of Penmaenpool The project extends two previous modelling studies in other representative Welsh estuaries, namely the Dyfi Estuary in mid Wales (Robins, 2009a) and the Burry Inlet in south Wales (Robins, 2009b). A mathematical model of the Mawddach Estuary has been developed to reproduce the interactions of tidal and fresh water hydrodynamics within the estuary and surrounding low lying areas. The model is based on a TELEMAC Modelling System which calculates the temporal and spatial variations in hydrodynamics (e.g. elevations, velocities, pressure, density) and sediment transport through a finite-element model grid (an unstructured mesh of nodes connected in a triangular framework) which represents the bathymetry of the area. Input data to the model includes bathymetric data from Admiralty charts and LIDAR data. Three grids have been produced against which different scenarios can be modelled. 1) 2-D model of the present day Mawddach Estuary 2) Alterations to represent the past and future 3) Alterations to remove the embankments upstream of Penmaenpool The project extends two previous modelling studies in other representative Welsh estuaries, namely the Dyfi Estuary in mid Wales (Robins, 2009a) and the Burry Inlet in south Wales (Robins, 2009b).