{"accessLimitation":{"value":"no limitations to public access","code":"Available","uri":"http://purl.org/coar/access_right/c_abf2"},"authors":[{"familyName":"Bloomfield","givenName":"J.P.","organisationName":"British Geological Survey","organisationIdentifier":"https://ror.org/04a7gbp98","role":"author","email":"enquiries@bgs.ac.uk","fullName":"Bloomfield, J.P."},{"familyName":"Marchant","givenName":"B.P.","organisationName":"British Geological Survey","organisationIdentifier":"https://ror.org/04a7gbp98","role":"author","email":"enquiries@bgs.ac.uk","fullName":"Marchant, B.P."},{"familyName":"Wang","givenName":"L.","organisationName":"British Geological Survey","organisationIdentifier":"https://ror.org/04a7gbp98","role":"author","email":"enquiries@bgs.ac.uk","fullName":"Wang, L."}],"availability":"Available","boundingBoxes":[{"westBoundLongitude":-8.648,"eastBoundLongitude":1.768,"southBoundLatitude":49.864,"northBoundLatitude":60.861,"bounds":"{\"type\": \"Feature\",      \"properties\": {},      \"geometry\": {        \"type\": \"Polygon\",        \"coordinates\": [[[-8.648, 49.864], [-8.648, 60.861], [1.768, 60.861], [1.768, 49.864], [-8.648, 49.864]]]      }}","coordinates":"[[[-8.648, 49.864], [-8.648, 60.861], [1.768, 60.861], [1.768, 49.864], [-8.648, 49.864]]]"}],"citation":{"authors":["Bloomfield, J.P.","Marchant, B.P.","Wang, L."],"bibtex":"https://catalogue.ceh.ac.uk/documents/d92c91ec-2f96-4ab2-8549-37d520dbd5fc/citation?format=bib","day":12,"doi":"10.5285/d92c91ec-2f96-4ab2-8549-37d520dbd5fc","month":3,"publisher":"NERC Environmental Information Data Centre","resourceTypeGeneral":"dataset","ris":"https://catalogue.ceh.ac.uk/documents/d92c91ec-2f96-4ab2-8549-37d520dbd5fc/citation?format=ris","title":"Historic Standardised Groundwater level Index (SGI) for 54 UK boreholes (1891-2015) ","url":"https://doi.org/10.5285/d92c91ec-2f96-4ab2-8549-37d520dbd5fc","year":2018},"custodians":[{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"custodian","email":"info@eidc.ac.uk"}],"datasetReferenceDate":{"publicationDate":"2018-03-12","releasedDate":"2019-01-03"},"description":"Monthly Standardised Groundwater level Index (SGI) for observation boreholes across the UK from 1891 to 2015, based on reconstructed groundwater level time series (Bloomfield et al., 2018; https://doi.org/10.5285/ccfded8f-c8dc-4a24-8338-5af94dbfcc16). Standardised groundwater levels have been estimated using a non-parametric normal scores transform of groundwater level data for each calendar month. Probability estimates of an SGI being less than 0, -1, -1.5 and -2 are also provided. ","distributionFormats":[{"name":"Comma-separated values (CSV)","type":"text/csv","version":"unknown"}],"distributorContacts":[{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"distributor","email":"info@eidc.ac.uk"}],"funding":[{"funderName":"Natural Environment Research Council","funderIdentifier":"https://ror.org/02b5d8509","awardTitle":"Analysis of historic drought and water scarcity in the UK: a systems-based study of drivers, impacts and their interactions","awardNumber":"NE/L010151/1 ","orcid":false,"ror":true}],"id":"d92c91ec-2f96-4ab2-8549-37d520dbd5fc","incomingCitationCount":3,"incomingCitations":[{"description":"Barker, L.J., Hannaford, J., Parry, S., Smith, K.A., Tanguy, M., & Prudhomme, C. (2019). Historic hydrological droughts 1891-2015: systematic characterisation for a diverse set of catchments across the UK. Hydrology and Earth System Sciences, 23(11), 4583-4602.","url":"https://doi.org/10.5194/hess-23-4583-2019","type":"academic"},{"description":"British Geological Survey (2021). RSK0066 - Risk Assessment and Risk Planning. UK Parliament Select Committee Publications.","url":"https://committees.parliament.uk/writtenevidence/21952/pdf/","type":"policy"},{"description":"Environment Agency (2023). Review of the research and scientific understanding of drought. The UK Government.","url":"https://www.gov.uk/government/publications/review-of-the-research-and-scientific-understanding-of-drought","type":"policy"}],"infoLinks":[{"url":"https://data-package.ceh.ac.uk/sd/d92c91ec-2f96-4ab2-8549-37d520dbd5fc.zip","name":"Supporting information","description":"Supporting information available to assist in re-use of this dataset","function":"information","type":"OTHER"}],"inspireThemes":[{"theme":"Geology","uri":"http://inspire.ec.europa.eu/theme/ge"},{"theme":"Hydrography","uri":"http://inspire.ec.europa.eu/theme/hy"}],"keywordsOther":[{"value":"Droughts"},{"value":"Water scarcity"},{"value":"Drought inventory"},{"value":"Drought catalogue"},{"value":"Drought indicator"},{"value":"SGI"},{"value":"Standardised Groundwater level Index"},{"value":"Borehole"}],"keywordsPlace":[{"value":"United Kingdom","uri":"http://sws.geonames.org/2635167"}],"keywordsProject":[{"value":"Historic Droughts"}],"licences":[{"value":"This resource is made available under the terms of the Open Government Licence","code":"license","uri":"https://eidc.ac.uk/licences/ogl/plain"}],"lineage":"Monthly standardised groundwater levels have been estimated using a non-parametric normal scores transform for the data for each calendar month. The normal scores transform assigns a value to observations, in this case monthly reconstructed groundwater levels (Bloomfield et al., 2018; https://doi.org/10.5285/ccfded8f-c8dc-4a24-8338-5af94dbfcc16), based on their rank within a data set, in this case groundwater levels for a given month from a given hydrograph. The normal scores transform is undertaken by applying the inverse normal cumulative distribution function to n equally spaced pi values ranging from 1/(2 n) to 1 - 1/(2 n). The values that result are the SGI values.\n\nThe quantification of uncertainty in the reconstructed groundwater levels for a given site is based on the Generalised Likelihood Uncertainty Estimation (GLUE) methodology. Parameter sets are considered to be behavioural if their Nash Sutcliffe Efficiency score exceeds 0.5. For each site, all of the behavioural groundwater level reconstructions are converted to SGI series. The probability of the SGI being within an interval on a particular date is equal to the proportion of these behavioural SGI series that fall within this interval and the probability of SGI being less than 0, -1, -1.5 and -2 is reported.","metadataDate":"2026-05-11T17:45:03","notGEMINI":false,"onlineResources":[{"url":"https://data-package.ceh.ac.uk/data/d92c91ec-2f96-4ab2-8549-37d520dbd5fc","name":"Download the data","description":"Download a copy of this data","function":"download","type":"OTHER"},{"url":"https://data-package.ceh.ac.uk/sd/d92c91ec-2f96-4ab2-8549-37d520dbd5fc.zip","name":"Supporting information","description":"Supporting information available to assist in re-use of this dataset","function":"information","type":"OTHER"}],"pointsOfContact":[{"familyName":"Bloomfield","givenName":"John","organisationName":"British Geological Survey","organisationIdentifier":"https://ror.org/04a7gbp98","role":"pointOfContact","email":"enquiries@bgs.ac.uk","address":{"deliveryPoint":"Maclean Building, Benson Lane, Crowmarsh Gifford","city":"Wallingford","administrativeArea":"Oxfordshire","postalCode":"OX10 8BB","country":"United Kingdom"},"fullName":"Bloomfield, J.","pointOfContact":"British Geological Survey"}],"publicationDate":"2018-03-12T00:00:00.000Z","publishers":[{"organisationName":"NERC Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"publisher","email":"info@eidc.ac.uk"}],"relationships":[{"relation":"http://purl.org/dc/terms/isPartOf","target":"af1db516-3411-416f-9c51-5ab99d912f8a"}],"resourceIdentifiers":[{"code":"https://catalogue.ceh.ac.uk/id/d92c91ec-2f96-4ab2-8549-37d520dbd5fc"},{"code":"10.5285/d92c91ec-2f96-4ab2-8549-37d520dbd5fc","codeSpace":"doi"}],"resourceMaintenance":[{"frequencyOfUpdate":"notPlanned"}],"resourceType":{"value":"dataset"},"responsibleParties":[{"familyName":"Bloomfield","givenName":"John","organisationName":"British Geological Survey","organisationIdentifier":"https://ror.org/04a7gbp98","role":"pointOfContact","email":"enquiries@bgs.ac.uk","address":{"deliveryPoint":"Maclean Building, Benson Lane, Crowmarsh Gifford","city":"Wallingford","administrativeArea":"Oxfordshire","postalCode":"OX10 8BB","country":"United Kingdom"},"fullName":"Bloomfield, J.","pointOfContact":"British Geological Survey"},{"familyName":"Bloomfield","givenName":"J.P.","organisationName":"British Geological Survey","organisationIdentifier":"https://ror.org/04a7gbp98","role":"author","email":"enquiries@bgs.ac.uk","fullName":"Bloomfield, J.P."},{"familyName":"Marchant","givenName":"B.P.","organisationName":"British Geological Survey","organisationIdentifier":"https://ror.org/04a7gbp98","role":"author","email":"enquiries@bgs.ac.uk","fullName":"Marchant, B.P."},{"familyName":"Wang","givenName":"L.","organisationName":"British Geological Survey","organisationIdentifier":"https://ror.org/04a7gbp98","role":"author","email":"enquiries@bgs.ac.uk","fullName":"Wang, L."},{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"custodian","email":"info@eidc.ac.uk"},{"organisationName":"NERC Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"publisher","email":"info@eidc.ac.uk"}],"spatialReferenceSystems":[{"code":"http://www.opengis.net/def/crs/EPSG/0/27700","title":"OSGB 1936 / British National Grid"}],"spatialRepresentationTypes":["textTable"],"temporalExtents":[{"begin":"1891-01-01","end":"2015-12-31"}],"title":"Historic Standardised Groundwater level Index (SGI) for 54 UK boreholes (1891-2015) ","topicCategories":[{"value":"environment","uri":"http://inspire.ec.europa.eu/metadata-codelist/TopicCategory/environment"},{"value":"geoscientificInformation","uri":"http://inspire.ec.europa.eu/metadata-codelist/TopicCategory/geoscientificInformation"},{"value":"inlandWaters","uri":"http://inspire.ec.europa.eu/metadata-codelist/TopicCategory/inlandWaters"}],"type":"dataset","uri":"https://catalogue.ceh.ac.uk/id/d92c91ec-2f96-4ab2-8549-37d520dbd5fc","useConstraints":[{"value":"This resource is made available under the terms of the Open Government Licence","code":"license","uri":"https://eidc.ac.uk/licences/ogl/plain"},{"value":"BGS © NERC 2019","code":"copyright"}]}