Get flood risk data

How to access flood risk data

We use a range of datasets to produce flood risk results in the "check your long term flood risk" service.

Technical users can find and download the datasets and put them into their own GIS or internal systems by following the links on this page.

You can also search for the datasets on the Data Services Platform (DSP) .

Once you’ve chosen a dataset you can select an area on the map and download the whole dataset or an area of interest.

What data you can get

You can find and access data on flood risk from:

• rivers and the sea
• surface water
• reservoirs

The datasets are not suitable for identifying whether an individual property will flood.

Rivers and the sea data

The following dataset shows the chance of flooding from rivers and the sea, presented as 4 likelihood categories:

• risk of flooding from rivers and sea

Surface water data

There are a series of surface water datasets available, including:

• extent of flooding
• velocity (including speed, direction and depth of flooding)

The surface water datasets on the DSP do not include the 15 metre marker used on the "check your long term flood risk" service.

Extent of flooding

The following datasets show the extent of flooding from surface water that could result from a flood in low, medium and high risk scenarios:

• low – risk of flooding from surface water extent: 0.1% annual chance
• medium – risk of flooding from surface water extent: 1% annual chance
• high - risk of flooding from surface water extent: 3.3% annual chance

Direction of flood water

The following datasets are based on a 25m grid. They show the direction of flooding from surface water that could result from a flood in low, medium and high risk scenarios:

• low – risk of flooding from surface water direction (25m): 0.1% annual chance
• medium – risk of flooding from surface water direction (25m): 1% annual chance
• high – risk of flooding from surface water direction (25m): 3.3% annual chance

You can also use the following datasets, which are based on a 2m grid:

• low – risk of flooding from surface water direction (2m): 0.1% annual chance
• medium – risk of flooding from surface water direction (2m): 1% annual chance
• high – risk of flooding from surface water direction (2m): 3.3% annual chance

Speed of flood water

The following datasets show the speed of flooding from surface water that could result from a flood in low, medium and high risk scenarios:

• low – risk of flooding from surface water speed: 0.1% annual chance
• medium – risk of flooding from surface water speed: 1% annual chance
• high – risk of flooding from surface water speed: 3.3% annual chance

Depth of flood water

The following datasets show the depth of flooding from surface water that could result from a flood in low, medium and high risk scenarios:

• low – risk of flooding from surface water depth: 0.1% annual chance
• medium – risk of flooding from surface water depth: 1% annual chance
• high – risk of flooding from surface water depth: 3.3% annual chance

About the data modelling

The following dataset shows information about the computer modelling used in an area:

• risk of flooding from surface water input model details

Scale and suitability of the data

The following dataset gives a suitability rating, which tells you what scale the information should be used at:

• risk of flooding from surface water suitability

Reservoir data

The following datasets show the predicted extent of flooding if reservoirs fail when nearby rivers:

• are at normal levels – reservoir flood extents - dry day (national)
• have burst their banks – reservoir flood extents - wet day (national)

Groundwater data

We do not have modelled data for groundwater flooding.

We use flood alert data to check the risk of flooding from groundwater.