Vesuviano, G.; Griffin, A.; Stewart, E.; Cole, S.
Gridded rainfall depth-duration-frequency (DDF) estimates for the state of Kerala, India, 1979-2020
Cite this dataset as:
Vesuviano, G.; Griffin, A.; Stewart, E.; Cole, S. (2022). Gridded rainfall depth-duration-frequency (DDF) estimates for the state of Kerala, India, 1979-2020. NERC EDS Environmental Information Data Centre. https://doi.org/10.5285/4a08e6f1-e508-4bb6-b571-b3145dd1588e
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This dataset is available under the terms of the Open Government Licence
https://doi.org/10.5285/4a08e6f1-e508-4bb6-b571-b3145dd1588e
This data represents twenty-four modelled rainfall depth estimates by GridASCII files across the state of Kerala, India, for four durations (1, 6, 24 and 192 hours) and six return periods (2, 5, 10, 25, 50 and 100 years). The estimates were produced using a similar procedure to the Flood Estimation Handbook statistical method for flood frequency estimation: separately for each duration, the estimated median annual maximum (AMAX) rainfall was used as a standardizing “index” value and the estimated L-moments of the AMAX series were used to fit a generalized logistic distribution “growth curve”. The data are in units of mm at a spatial resolution of 0.12 degrees.
Publication date: 2022-11-22
View numbers valid from 01 June 2023 Download numbers valid from 20 June 2024 (information prior to this was not collected)
Format
ASCII grid
Spatial information
Study area
Spatial representation type
Raster
Spatial reference system
WGS 84
Provenance & quality
1, 6, 24 and 192-hour annual maximum rainfalls were extracted from the gridded Indian Monsoon Data Assimilation and Analysis (IMDAA) hourly rainfall dataset for each year of 1979-2020 inclusive, for each grid cell in the state of Kerala, India. At each point, the median, and L-moments of the 42 annual maxima were calculated separately for each duration. At each location, linear regressions were created for the median using longitude, latitude, duration and mean annual rainfall. Linear regressions were created for the first two L-moments using these descriptors variables plus altitude and modelled median of annual maxima. The generalized logistic distribution was then used with the modelled median and L-moment ratios at each site to estimate the rainfall depths associated with specified durations and return periods.
Licensing and constraints
This dataset is available under the terms of the Open Government Licence
Cite this dataset as:
Vesuviano, G.; Griffin, A.; Stewart, E.; Cole, S. (2022). Gridded rainfall depth-duration-frequency (DDF) estimates for the state of Kerala, India, 1979-2020. NERC EDS Environmental Information Data Centre. https://doi.org/10.5285/4a08e6f1-e508-4bb6-b571-b3145dd1588e
Supplemental information
Correspondence/contact details
Vesuviano, G.
UK Centre for Ecology & Hydrology
Maclean Building, Benson Lane, Crowmarsh Gifford
Wallingford
Oxfordshire
OX10 8BB
UNITED KINGDOM
enquiries@ceh.ac.uk
Wallingford
Oxfordshire
OX10 8BB
UNITED KINGDOM
Authors
Other contacts
Rights holder
UK Centre for Ecology & Hydrology
Custodian
NERC EDS Environmental Information Data Centre
info@eidc.ac.uk
Publisher
NERC EDS Environmental Information Data Centre
info@eidc.ac.uk