Gridded rainfall depth-duration-frequency (DDF) estimates for the state of Kerala, India, 1979-2020

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. Full details about this dataset can be found at https://doi.org/10.5285/4a08e6f1-e508-4bb6-b571-b3145dd1588e

Identification info

Metadata Language: English (en)

Character set: utf8

Dataset Reference Date (): 2022-11-22

Identifier: https://catalogue.ceh.ac.uk/id/4a08e6f1-e508-4bb6-b571-b3145dd1588e

Identifier: doi: / 10.5285/4a08e6f1-e508-4bb6-b571-b3145dd1588e

Other citation details: 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 10.5285/4a08e6f1-e508-4bb6-b571-b3145dd1588e

UK Centre for Ecology & Hydrology - Vesuviano, G.

UK Centre for Ecology & Hydrology - Griffin, A.

UK Centre for Ecology & Hydrology - Stewart, E.

UK Centre for Ecology & Hydrology - Cole, S.

NERC EDS Environmental Information Data Centre

UK Centre for Ecology & Hydrology - Vesuviano, G.

NERC EDS Environmental Information Data Centre

UK Centre for Ecology & Hydrology

Keywords

Hydrology
rainfall
DDF
depth-duration-frequency
precipitation
Kerala
India

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Other constraints: This resource is available under the terms of the Open Government Licence

Use constraints: otherRestrictions

Other constraints: If you reuse this data, you should cite: 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

Spatial representation type: grid

Topic category

Climatology, meteorology, atmosphere

Code: WGS 84

Distribution Information

Data format

ASCII grid ()

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Quality Scope: dataset

Other: dataset

Report

Dataset Reference Date (): 2010-12-08

Statement: 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.

Metadata

File identifier: 4a08e6f1-e508-4bb6-b571-b3145dd1588e XML

Metadata Language: English (en)

Character set: ISO/IEC 8859-1 (also known as Latin 1)

Resource type: dataset

Hierarchy level name: dataset

Metadata Date: 2022-11-28T10:49:27

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Environmental Information Data Centre

Lancaster Environment Centre, Library Avenue, Bailrigg , Lancaster , LA1 4AP , UK

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