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Three karst springs were investigated. Data were obtained via sensor approach with 15mins time interval between May 2016 to October 2017. ","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","awardNumber":"NE/N007425/1","orcid":false,"ror":true}],"id":"f70596a1-0994-4b08-abab-0c9398af447d","incomingCitationCount":1,"incomingCitations":[{"description":"Yue, F.-J., et al. (2019). Land use interacts with changes in catchment hydrology to generate chronic nitrate pollution in karst waters and strong seasonality in excess nitrate export. Science of the Total Environment 696: 134062.","url":"https://doi.org/10.1016/j.scitotenv.2019.134062"}],"infoLinks":[{"url":"https://data-package.ceh.ac.uk/sd/f70596a1-0994-4b08-abab-0c9398af447d.zip","name":"Supporting information","description":"Supporting information available to assist in re-use of this dataset","function":"information","type":"OTHER"}],"keywordsOther":[{"value":"Hydrochemistry"},{"value":"Sensor"},{"value":"nitrate","uri":"http://www.eionet.europa.eu/gemet/concept/5593"},{"value":"spring (hydrology, land)","uri":"http://www.eionet.europa.eu/gemet/concept/8025"},{"value":"karst","uri":"http://www.eionet.europa.eu/gemet/concept/4545"}],"keywordsPlace":[{"value":"Houzhai"}],"licences":[{"value":"This resource is available under the terms of the Open Government Licence","code":"license","uri":"https://eidc.ac.uk/licences/ogl/plain"}],"lineage":"The pH sonde was calibrated every month by trained operators following standard operating procedures. For nitrate-N sensor calibration, discrete stream water samples for validation were collected manually at weekly or biweekly intervals, with additional samples collected during precipitation event periods using autosamplers at sampling intervals of one to four hours. \nStatistical relationships between the sensor-estimated [NO3−–N] and the laboratory measured [NO3−–N] were generated. To evaluate this calibration processes, the uncertainty (μC) of shorter monitoring period calibration and one single calibration for whole monitoring period at each site was compared. Finally, shorter monitoring period calibration was used for all sensor data.","metadataDate":"2026-06-27T18:49:52","notGEMINI":true,"onlineResources":[{"url":"https://data-package.ceh.ac.uk/data/f70596a1-0994-4b08-abab-0c9398af447d","name":"Download the data","description":"Download a copy of this data","function":"download","type":"OTHER"},{"url":"https://data-package.ceh.ac.uk/sd/f70596a1-0994-4b08-abab-0c9398af447d.zip","name":"Supporting information","description":"Supporting information available to assist in re-use of this dataset","function":"information","type":"OTHER"}],"pointsOfContact":[{"familyName":"Yue","givenName":"F-J.","organisationName":"Tianjin University","organisationIdentifier":"https://ror.org/012tb2g32","role":"pointOfContact","email":"fujun_yue@tju.edu.cn","nameIdentifier":"https://orcid.org/0000-0003-3733-7216","address":{"country":"China"},"fullName":"Yue, F.","pointOfContact":"Tianjin University"}],"publicationDate":"2020-07-16T00:00:00.000Z","publishers":[{"organisationName":"NERC Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"publisher","email":"info@eidc.ac.uk"}],"resourceIdentifiers":[{"code":"https://catalogue.ceh.ac.uk/id/f70596a1-0994-4b08-abab-0c9398af447d"},{"code":"10.5285/f70596a1-0994-4b08-abab-0c9398af447d","codeSpace":"doi"}],"resourceType":{"value":"dataset"},"responsibleParties":[{"familyName":"Yue","givenName":"F-J.","organisationName":"Tianjin University","organisationIdentifier":"https://ror.org/012tb2g32","role":"pointOfContact","email":"fujun_yue@tju.edu.cn","nameIdentifier":"https://orcid.org/0000-0003-3733-7216","address":{"country":"China"},"fullName":"Yue, F.","pointOfContact":"Tianjin University"},{"familyName":"Yue","givenName":"F-J.","organisationName":"Tianjin University","organisationIdentifier":"https://ror.org/012tb2g32","role":"author","email":"fujun_yue@tju.edu.cn","nameIdentifier":"https://orcid.org/0000-0003-3733-7216","address":{"country":"China"},"fullName":"Yue, F."},{"familyName":"Waldron","givenName":"S.","organisationName":"University of Glasgow","organisationIdentifier":"https://ror.org/00vtgdb53","role":"author","email":"Susan.Waldron@glasgow.ac.uk","nameIdentifier":"https://orcid.org/0000-0002-2683-0761","address":{"country":"United Kingdom"},"fullName":"Waldron, S."},{"familyName":"Oliver","givenName":"D.","organisationName":"University of Stirling","organisationIdentifier":"https://ror.org/045wgfr59","role":"author","email":"david.oliver@stir.ac.uk","nameIdentifier":"https://orcid.org/0000-0002-6200-562X","address":{"country":"United Kingdom"},"fullName":"Oliver, D."},{"familyName":"Ding","givenName":"H.","organisationName":"Tianjin University","organisationIdentifier":"https://ror.org/012tb2g32","role":"author","email":"dinghu@tju.edu.cn","nameIdentifier":"https://orcid.org/0000-0001-5749-9445","address":{"country":"China"},"fullName":"Ding, H."},{"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/0/3857","title":"WGS 84 / Pseudo-Mercator"}],"spatialRepresentationTypes":["textTable"],"spatialResolutions":[{"distance":"1000","uom":"urn:ogc:def:uom:EPSG::9001"}],"temporalExtents":[{"begin":"2016-05-01","end":"2017-10-31"}],"title":"Hydrochemistry and nitrate sensor data from three karst sites in SW China, 2016-2017","topicCategories":[{"value":"environment","uri":"http://inspire.ec.europa.eu/metadata-codelist/TopicCategory/environment"}],"type":"dataset","uri":"https://catalogue.ceh.ac.uk/id/f70596a1-0994-4b08-abab-0c9398af447d","useConstraints":[{"value":"This resource is available under the terms of the Open Government Licence","code":"license","uri":"https://eidc.ac.uk/licences/ogl/plain"},{"value":"© Natural Environment Research Council","code":"copyright"},{"value":"© Tianjin University, China","code":"copyright"},{"value":"© University of Glasgow, UK","code":"copyright"},{"value":"© University of Stirling, UK","code":"copyright"},{"value":"© National Natural Science Foundation, China","code":"copyright"}]}