@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix gsp: <http://www.opengis.net/ont/geosparql#> .
@prefix locn: <http://www.w3.org/ns/locn#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://ckan.integration.publishing.service.gov.uk/dataset/5e54f6bc-e359-4e7f-9d47-db3974706411> a dcat:Dataset ;
    dct:description "Standardised Precipitation Evapotranspiration Index (SPEI) data for Integrated Hydrological Units (IHU) Hydrometric Areas (Kral et al. [1]). SPEI is a drought index based on the probability of occurrence of the Climatic Water Balance (CWB) - which is equivalent to the amount of precipitation minus the amount of evapotranspiration - for a given accumulation period as defined by Vicente-Serrano et al. [2]. SPEI is calculated for different accumulation periods: 1, 3, 6, 12, 18, 24 months. Each of these is in turn calculated for each of the twelve calendar months. Note that values in monthly (and for longer accumulation periods also annual) time series of the data therefore are likely to be autocorrelated. The standard period which was used to fit the gamma distribution is 1961-2010. The dataset covers the period from 1961 to 2012. [1] Kral, F., Fry, M., Dixon, H. (2015). Integrated Hydrological Units of the United Kingdom: Hydrometric Areas without Coastline. NERC-Environmental Information Data Centre https://doi.org/10.5285/3a4e94fc-4c68-47eb-a217-adee2a6b02b3 [2] Vicente-Serrano, S. M., Beguería, S., & López-Moreno, J. I. (2010) A Multiscalar Drought Index Sensitive to Global Warming: The Standardized Precipitation Evapotranspiration Index. J. Climate, 23, 1696-1718. https://doi.org/10.1175/2009JCLI2909.1 Full details about this dataset can be found at https://doi.org/10.5285/19c230b2-415b-456a-9e93-7b00b730a465" ;
    dct:identifier "19c230b2-415b-456a-9e93-7b00b730a465" ;
    dct:issued "2015-10-14T23:26:24.358141"^^xsd:dateTime ;
    dct:modified "2026-03-27T15:26:30.456687"^^xsd:dateTime ;
    dct:publisher <https://ckan.integration.publishing.service.gov.uk/organization/866f4088-ae4f-43b8-ba8c-6d3141a327f2> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((3.5540 49.7660, -7.5570 49.7660, -7.5570 61.0260, 3.5540 61.0260, 3.5540 49.7660))"^^gsp:wktLiteral,
                "{\"type\": \"Polygon\", \"coordinates\": [[[3.554, 49.766], [-7.557, 49.766], [-7.557, 61.026], [3.554, 61.026], [3.554, 49.766]]]}"^^<https://www.iana.org/assignments/media-types/application/vnd.geo+json> ] ;
    dct:title "Standardised Precipitation Evapotranspiration Index time series for Integrated Hydrological Units Hydrometric Areas (1961-2012)" ;
    dcat:distribution <https://ckan.integration.publishing.service.gov.uk/dataset/5e54f6bc-e359-4e7f-9d47-db3974706411/resource/4d9af86b-b6e0-4af6-98f2-6ad1b9dfcd92>,
        <https://ckan.integration.publishing.service.gov.uk/dataset/5e54f6bc-e359-4e7f-9d47-db3974706411/resource/56bfca65-e390-48a6-b434-d50e32bbdcea> ;
    dcat:keyword "IHU",
        "Integrated Hydrological Units",
        "Meteorological geographical features",
        "SPEI",
        "climatic water balance",
        "indicator",
        "rainfall extremes" .

<https://ckan.integration.publishing.service.gov.uk/dataset/5e54f6bc-e359-4e7f-9d47-db3974706411/resource/4d9af86b-b6e0-4af6-98f2-6ad1b9dfcd92> a dcat:Distribution ;
    dct:description "Supporting information available to assist in re-use of this dataset" ;
    dct:format "ZIP" ;
    dct:issued "2026-03-27T15:26:30.516727"^^xsd:dateTime ;
    dct:modified "2026-03-27T15:26:30.461365"^^xsd:dateTime ;
    dct:title "Supporting information" ;
    dcat:accessURL <https://data-package.ceh.ac.uk/sd/19c230b2-415b-456a-9e93-7b00b730a465.zip> ;
    dcat:mediaType "application/zip" .

<https://ckan.integration.publishing.service.gov.uk/dataset/5e54f6bc-e359-4e7f-9d47-db3974706411/resource/56bfca65-e390-48a6-b434-d50e32bbdcea> a dcat:Distribution ;
    dct:description "Download a copy of this data" ;
    dct:issued "2026-03-27T15:26:30.516725"^^xsd:dateTime ;
    dct:modified "2026-03-27T15:26:30.461291"^^xsd:dateTime ;
    dct:title "Download the data" ;
    dcat:accessURL <https://data-package.ceh.ac.uk/data/19c230b2-415b-456a-9e93-7b00b730a465> .

<https://ckan.integration.publishing.service.gov.uk/organization/866f4088-ae4f-43b8-ba8c-6d3141a327f2> a foaf:Organization ;
    foaf:name "Environmental Information Data Centre" .