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Griffin, A.; Kay, A.; Bell, V.A.; Stewart, E.J.; Sayer, P.; Carr, S.

Peak flow and probability of exceedance data for Grid-to-Grid modelled widespread flooding events across mainland GB from 1980-2010 and 2050-2080

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PLEASE NOTE: By accessing or using this dataset, you agree to the terms of the relevant licence agreement(s). You will ensure that this dataset is cited in any publication that describes research in which the data have been used.

This dataset is available under the terms of the Open Government Licence

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https://doi.org/10.5285/26ce15dd-f994-40e0-8a09-5f257cc1f2ab
This dataset is a set of 24 gridded netcdf files, each including data describing a total of 14,400 widespread flooding events across mainland GB, with event selection based on a peaks-over-threshold approach. The data describes peak river flow in m3/s and the associated annual probability of exceedance for each 1km grid-square on the GB river network. The data is extracted from daily time series data from the Grid-to-Grid model, using UKCP18 12km regional projections from 12 members of a perturbed parameter ensemble, over the periods Dec 1980 – Nov 2010 and Dec 2050 – Nov 2080 (based on 360-day years). Multi-day events were summarised by taking cell-wise flow maxima.

This data was generated for use in analysis of risk through catastrophe modelling using the Future Flows Explorer. It was generated and interpreted by UKCEH, working with Sayers & Partners Consultancy, as part of the AquaCAT project, part of the UK Climate Resilience Programme.
Publication date: 2022-06-27
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More information

View numbers valid from 01 June 2023 Download numbers valid from 20 June 2024 (information prior to this was not collected)

Formats

Comma-separated values (CSV), Shapefile

Spatial information

Study area
Spatial representation types
Tabular (text)
Vector
Spatial reference system
OSGB 1936 / British National Grid

Temporal information

Temporal extent
1980-12-01    to    2080-11-30

Provenance & quality

Hydrological flow records were generated using Grid-to-Grid and UKCP18 12km regional projections. Widespread events were selected for which daily flow exceeded a 99.5% percentile simultaneously over at least 20km^2. Multi-day events (consecutive days for which the above conditions were met) are summarised by pointwise maxima of flow.

Probabilities of exceedance are computed pointwise using a mixed distribution, with an empirical distribution used for non-extreme values (below the 99.5% percentile) and a Generalised Pareto distribution used above, both fitted to the full time series of daily flow.

Licensing and constraints

This dataset is available under the terms of the Open Government Licence

Cite this dataset as:
Griffin, A.; Kay, A.; Bell, V.A.; Stewart, E.J.; Sayer, P.; Carr, S. (2022). Peak flow and probability of exceedance data for Grid-to-Grid modelled widespread flooding events across mainland GB from 1980-2010 and 2050-2080. NERC EDS Environmental Information Data Centre. https://doi.org/10.5285/26ce15dd-f994-40e0-8a09-5f257cc1f2ab

Citations

Griffin, A., Kay, A., Stewart, E., & Sayers, P. (2022). Spatially coherent statistical simulation of widespread flooding events under climate change. Hydrology Research, 53(11), 1428-1440 https://doi.org/10.2166/nh.2022.069
Griffin, A., Kay, A.L., Sayers, P., Bell, V., Stewart, E., & Carr, S. (2024). Widespread flooding dynamics under climate change: characterising floods using grid-based hydrological modelling and regional climate projections. In Hydrology and Earth System Sciences (Vol. 28, Issue 12, pp. 2635–2650). Copernicus GmbH. https://doi.org/10.5194/hess-28-2635-2024

Correspondence/contact details

Dr Adam Griffin
UK Centre for Ecology & Hydrology
Maclean Building, Benson Lane, Crowmarsh Gifford
Wallingford
Oxfordshire
OX10 8BB
UNITED KINGDOM
 enquiries@ceh.ac.uk

Authors

Griffin, A.
UK Centre for Ecology & Hydrology
Kay, A.
UK Centre for Ecology & Hydrology
Bell, V.A.
UK Centre for Ecology & Hydrology
Stewart, E.J.
UK Centre for Ecology & Hydrology
Sayer, P.
Sayers and Partners Consultancy
Carr, S.
Sayers and Partners Consultancy

Other contacts

Rights holders
UK Centre for Ecology & Hydrology, Sayers and Partners Consultancy
Custodian
NERC EDS Environmental Information Data Centre
 info@eidc.ac.uk
Publisher
NERC EDS Environmental Information Data Centre
 info@eidc.ac.uk

Additional metadata

Topic categories
environment
INSPIRE theme
Environmental Monitoring Facilities
Keywords
Environmental risk , Flood frequency , Hydrology
Last updated
19 July 2024 10:10