Catalogue

32 Results


  • The Areas Benefiting from Flood Defences show areas in Wales that benefit from flood defences that protect against flooding from Rivers and the Sea. The areas shown benefit from different levels of flood protection and this is recognised in the risk classification shown in the Flood Risk Assessment Wales (FRAW) map.

    The outer boundary for the Areas Benefiting from Flood Defences is fixed to the

    ...More
    Appears under
    Spatial data Flooding
  • This is part of Coastal Design/Extreme Sea Levels, a GIS dataset and supporting information providing design / extreme sea level and typical surge information around the coastline of the UK, including England, Wales, Scotland, Northern Ireland, Isle of Man and Jersey. The information is relevant under present day (year 2018) conditions and does not account for future changes due to climate

    ...More
  • The Communities at Risk Register (CaRR) has been developed to provide an objective means of identifying risk and prioritising flood risk management activities at a Wales-wide, community level. It applies a standard methodology across all flood sources to calculate a theoretical ‘danger score’ that allows comparative risks to be quantified and ranked (from High to Low).

    The CaRR

    ...More
    Appears under
    Spatial data Flooding
  • The Development Advice Map (DAM) shows areas at risk of flooding from rivers and the sea for the purposes of land-use planning. The DAM supports Planning Policy Wales and Technical Advice Note (TAN) 15 to guide new development away from areas at risk of flooding wherever possible. Together, they form a precautionary framework to guide planning decisions. The DAM should be considered as a trigger

    ...More
  • Flood Alert Areas are geographical areas where it is possible for flooding to occur from rivers or the sea. A single Flood Alert Area may cover the floodplain within the Flood Warning Service Limit of multiple catchments of similar characteristics containing a number of Flood Warning Areas. A Flood Alert Area may also match that of a corresponding Flood Warning Area and warn for the possibility

    ...More
    Appears under
    Spatial data Flooding
  • This dataset shows flood defences that have been built to protect against flooding from rivers and the sea. The defences shown provide different levels of flood protection and this is recognised in the risk classification shown in the Flood Risk Assessment Wales (FRAW) map. Flood defences that are not yet shown, and the areas that benefit from them, will be gradually added.

    Flood defences do not

    ...More
    Appears under
    Spatial data Flooding
  • This dataset shows flood defences that have been built to protect against flooding from rivers and the sea. The defences shown provide different levels of flood protection and this is recognised in the risk classification shown in the Flood Risk Assessment Wales (FRAW) map. Flood defences that are not yet shown, and the areas that benefit from them, will be gradually added

    Flood defences do not

    ...More
    Appears under
    Spatial data Flooding
  • The Flood Map for Planning (FMfP) supports Welsh Government planning policy on flood risk and is the starting point for consideration of flood risk in the planning system. It provides an indication to which land is at risk of flooding from rivers, the sea and surface water and small watercourses, taking account the impacts of climate change over the next 100 years. The FMfP is the key dataset to

    ...More
    Appears under
    Spatial data Flooding
  • The Flood Map for Planning (FMfP) includes climate change information to show how this will affect flood risk extents for rivers, the sea and surface water and small watercourses over the next century. It shows the potential extent of flooding assuming no defences are in place. It also indicates areas at risk from coastal erosion, areas that have flooded in the past and key information on

    ...More
    Appears under
    Spatial data Flooding
  • The ‘NRW Local Model Manager’ shows the location of NRW’s detailed, local flood models which can be requested via datadistribution@naturalresourceswales.gov.uk

    NRW Local Model Manager is updated biannually to show up-to-date coverage of NRW’s flood models. Email datadistribution@naturalresourceswales.gov.uk to see if additional model data is available that is not displayed

    ...More
    Appears under
    Spatial data Flooding
  • The Cycle 1 Flood Risk Areas are those communities in Wales where most significant flood risks exist from surface water flooding only (from surface water run-off, groundwater and ordinary watercourses). These areas were identified for the purpose of the first Preliminary Flood Risk Assessment under the Flood Risk Regulations 2009 using guidance produced by the Welsh Government to identify areas

    ...More
    Appears under
    Spatial data Flooding
  • The Cycle 2 Flood Risk Areas are those communities in Wales where most significant flood risks exist across all sources of flood risk. They were identified for the purpose of the second Preliminary Flood Risk Assessment under the Flood Risk Regulations 2009. The threshold for communities at significant risk of flooding was set by Welsh Government with input from Natural Resources Wales and the

    ...More
    Appears under
    Spatial data Flooding
  • Flood Risk Assessment Wales provides a national assessment of risk flooding from Rivers, the Sea and Surface Water and Small Watercourses (replacing the Risk of Flooding Rivers and Sea, or RoFRS, dataset).

    The assessment takes into account flood defences and combines new, national-scale modelling with detailed local-scale models to categories risk into 3 bands, labelled ‘High’,

    ...More
    Appears under
    Spatial data Flooding
  • Flood Storage Areas show those areas that act as a balancing reservoir, storage basin or balancing pond. Their purpose is to attenuate an incoming flood peak to a flow level that can be accepted by the downstream channel. It may also delay the timing of a flood peak so that its volume is discharged over a longer time interval.

    Flood Storage Areas that are not yet shown will be gradually added as

    ...More
    Appears under
    Spatial data Flooding
  • This spatial Flood Warning Areas dataset are geographical areas where NRW expect flooding to occur and where NRW provide a Flood Warning Service. Flood Warning Areas generally contain properties that are expected to flood from rivers or the sea. Specifically, Flood Warning Areas define locations within the Flood Warning Service Limit that represent a discrete community at risk of flooding. A

    ...More
    Appears under
    Spatial data Flooding
  • Listing of Severe Flood Warnings, Flood Warnings, Update Flood Warnings and Flood Alerts issued since the Floodline Warnings Direct service went live on January 26th 2006 to the present. This dataset includes flood warnings issued by Natural Resources Wales (NRW) from 1 April 2013. Flood Alerts and Warnings are issued for flooding from rivers and the sea . For Flood Alerts this is generally river

    ...More
    Appears under
    Spatial data Flooding
  • This dataset contains details of Large Raised Reservoirs. Natural Resource Wales (NRW) collects and maintains data on all reservoirs designed or capable of holding more than 10,000 cubic metres of water above the natural level of any part of the land adjoining them defined as 'large raised reservoirs' under the Reservoirs Act 1975. Two types of reservoir are maintained within the register:

    ...More
    Appears under
    Spatial data Flooding Water
  • Information about flooding and other environmental alerts from NRW.

    Appears under
    Website Environment Flooding
  • This dataset is a more detailed version of the Coastal Erosion data also available on Lle. 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

    ...More
    Appears under
    Spatial data Marine Flooding
  • National Flood Hazard Maps

    The National Flood Risk Maps are based on generalised modelling created as part of Flood Risk Assessment Wales (FRAW) and published as part of Cycle 2 of the Flood Risk Regulations (2009).

    The National Flood Hazard Maps have been created for 3 sources of flooding, namely,

    1. Flooding from Rivers
    2. Flooding from the Sea
    3. Flooding from Surface Water & Small Watercourse
    ...More
    Appears under
    Spatial data Flooding
  • National Flood Risk Maps

    The National Flood Risk Maps are based on generalised modelling created as part of Flood Risk Assessment Wales (FRAW) and published as part of Cycle 2 of the Flood Risk Regulations (2009).

    The National Flood Risk Maps have been created for 3 sources of flooding, namely,

    1. Flooding from Rivers
    2. Flooding from the Sea
    3. Flooding from Surface Water & Small Watercourse

    The

    ...More
  • If you are a developer, you can now browse and download our data APIs directly from the Natural Resources Wales API Portal. 

    Current available API data sets 

    Flood Risk Forecast API (Open Data) - gives the indication of the potential for flooding for three days: the day on which it is issued and the subsequent two days ahead.

    Live Flood Warnings and Alerts API (Open Data) - provides

    ...More
  • Recorded Flood Extents shows areas that have been recorded to have flooded in the past from rivers, the sea or surface water. The records come from a number of evidence sources including Natural Resources Wales, its predecessors or other Risk Management Authorities.

    It is possible that the pattern of flooding in an area may have changed and would now flood under different circumstances. In

    ...More
    Appears under
    Spatial data Flooding
  • The datasets shows the spatial coastal baseline which is split into ‘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 a benchmark dataset showing erosion extents and rates for three periods:

    • Short Term (0 – 20yr);
    • Medium Term (20 – 50yr); and
    ...More
    Appears under
    Spatial data Marine Flooding
  • A Shoreline Management Plan (SMP) is a large-scale assessment of the risks associated with coastal processes and helps reduce these risks to people and the developed, historic and natural environments. Coastal processes include tidal patterns, wave height, wave direction and the movement of beach and seabed materials. The SMPs set the strategic policy direction for coastal management and identify

    ...More
    Appears under
    Spatial data Flooding
  • Working with Natural Processes (WWNP) Floodplain Reconnection Potential is our best estimate of locations where it may be possible to establish reconnection between a watercourse and its natural floodplain, especially during high flows. The dataset is designed to support signposting of areas where there is currently poor connectivity such that flood waters are constrained to the channel and flood

    ...More
  • Working with Natural Processes (WWNP) Floodplain Woodland Planting Potential is our best estimate of locations where tree planting on the floodplain may be possible, and effective to attenuate flooding. The dataset is designed to support signposting of areas of floodplain not already wooded.

    The information provided is largely based on modelled data and open constraints data, and is therefore

    ...More
  • Working with Natural Processes (WWNP) Riparian Woodland Potential is our best estimate of locations where tree planting may be possible on smaller floodplains close to flow pathways, and effective to attenuate flooding. The dataset is designed to support signposting of riparian areas not already wooded. The dataset is based upon a 50m buffer of available OS Open Data river networks. A set of open

    ...More
  • Runoff Attenuation Features Potential is our best estimate of locations of high flow accumulation across the land surface or in smaller channels, where it may be possible to temporarily store water and attenuate flooding during high flows. The dataset is designed to support signposting of areas where to target enhanced storage. It is based upon the Risk of Flooding from Surface Water datasets and

    ...More
  • Runoff Attenuation Features Potential is our best estimate of locations of high flow accumulation across the land surface or in smaller channels, where it may be possible to temporarily store water and attenuate flooding during high flows. The dataset is designed to support signposting of areas to target enhanced storage. It is based upon the Risk of Flooding from Surface Water datasets and

    ...More
  • Working with Natural Processes (WWNP) Wider Catchment Woodland Potential is our best estimate of locations where there are slowly permeable soils, where scrub and tree planting may be most effective to increase infiltration and hydrological losses. The dataset is designed to support signposting of areas not already wooded.

    Locations identified may have more recent building or land use than

    ...More
  • This dataset comprises a range of land cover types where the woodland potential layers have been masked, owing to existing woodland, watercourses, peat, roads, rail and urban areas. Other constraints data, such as protected habitats and high grade agricultural land, should also be considered.

    Locations identified may have more recent land use change than available at the time of publication.

    ...More
Page 1 of 1 (32 results)