Historic Standardised Streamflow Index (SSI) using Tweedie distribution with standard period 1961-2010 for 303 UK catchments (1891-2015)
This dataset contains the Standardised Streamflow Index (SSI) data for 303 catchments across the United Kingdom from 1891 to 2015. The SSI is a drought index based on the cumulative probability of a given monthly mean streamflow occurring for a given catchment. Here, the SSI is calculated for the following accumulation periods: 1, 3, 6, 9, 12, 18 and 24 months. Each accumulation period is calculated for calendar end-months. The standard period used to fit the Tweedie distribution is 1961-2010. The SSI was produced by the RCUK-funded Historic Droughts project in order to characterise and explore hydrological drought severity over the period 1891-2015. This dataset is an outcome of the Historic Droughts Project (grant number: NE/L01016X/1). Full details about this dataset can be found at
https://doi.org/10.5285/58ef13a9-539f-46e5-88ad-c89274191ff9
Simple
- Date (Publication)
- 2018-03-12
- Date (Creation)
- 2017-03-01
- Identifier
- doi: / 10.5285/58ef13a9-539f-46e5-88ad-c89274191ff9
- Other citation details
- Barker, L.J., Smith, K.A., Svensson, C., Tanguy, M., Hannaford, J. (2018). Historic Standardised Streamflow Index (SSI) using Tweedie distribution with standard period 1961-2010 for 303 UK catchments (1891-2015). NERC Environmental Information Data Centre 10.5285/58ef13a9-539f-46e5-88ad-c89274191ff9
- Maintenance and update frequency
- notPlanned Not planned
- GEMET - INSPIRE themes, version 1.0
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- Hydrography
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- no limitations
- Use constraints
- otherRestrictions Other restrictions
- Use constraints
- otherRestrictions Other restrictions
- Other constraints
- © UK Centre for Ecology & Hydrology
- Use constraints
- otherRestrictions Other restrictions
- Other constraints
- If you reuse this data, you should cite: Barker, L.J., Smith, K.A., Svensson, C., Tanguy, M., Hannaford, J. (2018). Historic Standardised Streamflow Index (SSI) using Tweedie distribution with standard period 1961-2010 for 303 UK catchments (1891-2015). NERC Environmental Information Data Centre https://doi.org/10.5285/58ef13a9-539f-46e5-88ad-c89274191ff9
- Spatial representation type
- textTable Text, table
- Metadata language
- EnglishEnglish
- Character set
- utf8 UTF8
- Topic category
-
- Inland waters
- Environment
- Begin date
- 1891-01-01
- End date
- 2015-11-01
N
S
E
W
))
- Unique resource identifier
- OSGB 1936 / British National Grid
- Distribution format
-
-
Comma-separated values (CSV)
()
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Comma-separated values (CSV)
()
- OnLine resource
-
Download the data
Download a copy of this data
- OnLine resource
-
Supporting information
Supporting information available to assist in re-use of this dataset
- Hierarchy level
- dataset Dataset
- Other
- dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Statement
- The SSI is calculated as defined in Svensson, et al., (2017 https://doi.org/ 10.1002/2016WR019276) and is based on the cumulative probability of a given monthly mean streamflow occurring for a given catchment. Here the SSI is calculated for the following accumulation periods: 1, 3, 6, 9, 12, 18 and 24 months. The Tweedie distribution was fitted to each accumulated time series of monthly mean flows. The 'SCI' package for R was used to calculate the SSI and a new function was written to enable the SCI package to call the 'tweedie' package for R. The input data used is monthly mean streamflow derived from modelled reconstructed streamflow (Smith et al., 2018 https://doi.org/10.5285/f710bed1-e564-47bf-b82c-4c2a2fe2810e ). Data were exported in comma separated value files (.csv format) and ingested into the EIDC.
- File identifier
- 58ef13a9-539f-46e5-88ad-c89274191ff9 XML
- Metadata language
- EnglishEnglish
- Character set
- ISO/IEC 8859-1 (also known as Latin 1) 8859 Part 1
- Hierarchy level
- dataset Dataset
- Hierarchy level name
- dataset
- Date stamp
- 2025-03-21T13:35:37
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3
Point of contact
NERC EDS Environmental Information Data Centre
Lancaster Environment Centre, Library Avenue, Bailrigg
,
Lancaster
,
LA1 4AP
,
UK
https://eidc.ac.uk/
Overviews
Spatial extent
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W
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Associated resources
Not available