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Laboratory tests were conducted at the University of Birmingham, UK, during 2023 as part of a wider study developing methods for urban storm flow characterization. Two sediment types were assessed along with three size fractions across concentration ranges from 0 mg/L to 5000 mg/L. Absorbance was recorded at key wavelengths between 190 – 360 nm and particle size distribution and organic content (loss on ignition) measured for each sediment type and size fraction.  \n\nThe work was supported by the Natural Environment Research Council (Grant NE/X011178/1).\n","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":"OFSTORM","awardNumber":"NE/X011178/1","orcid":false,"ror":true}],"hasOnlineServiceAgreement":true,"id":"ee577b07-1a2c-4541-bf30-e2ea048e15e1","incomingCitationCount":0,"infoLinks":[{"url":"https://data-package.ceh.ac.uk/sd/ee577b07-1a2c-4541-bf30-e2ea048e15e1.zip","name":"Supporting information","description":"Supporting information available to assist in re-use of this dataset","function":"information","type":"OTHER"}],"inspireThemes":[{"theme":"Environmental Monitoring Facilities","uri":"http://inspire.ec.europa.eu/theme/ef"}],"keywordsOther":[{"value":"Suspended sediment"},{"value":"Optical sensors"}],"keywordsTheme":[{"value":"Water quality","uri":"http://onto.nerc.ac.uk/CEHMD/topic/16"}],"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":"Measurements were taken using a commercially available absorbance sensor, Trios Opus (TriOS GmbH, Germany) at 1 minute intervals. Sediments were sieved into size fractions and particle size was quantified using  a Malvern Mastersizer 2000  (Malvern, UK) and organic content was assessed using the Loss on Ignition method.\n\nThe experimental setup consisted of a 5 L beaker filled with 4 L of deionized water, a large stirrer set to a constant rpm, and an opaque surround to minimize interference from ambient light on sensor measurements. The sensor was placed in the centre of the beaker, ~5 cm above the stirrer blade. To verify uniform mixing, subsamples were taken directly beside the optical window of the sensor and at two other locations within the beaker. These subsamples were analysed using a commercial handheld turbidimeter (Sper Scientific Portable Turbidity Meter 860040) at predefined calibration points to confirm consistent turbidity. Turbidity readings were stable and comparable across all sample positions at each calibration point.\n\nEach measurement cycle consisted of 15 calibration points spanning SSC concentrations from 0 to 5000 mg/L. During calibration, sensors recorded data continuously for 20 minutes, and once measurements had stabilized, 10 readings were randomly selected for further analysis.\n\nAll absorbance data were recorded by the TriOS Opus sensor and exported in CSV format, LOI data (weight measurements) were initially recorded on paper, then transferred into an Excel spreadsheet and particle size  data from the Mastersizer were exported as CSV files and imported into statistical software for analysis.  Records were screened for  any missing or null values and data points were checked to ensure they fell within expected ranges (e.g. in case of data entry errors). \n\n\n","metadataDate":"2026-06-29T18:20:47","notGEMINI":false,"onlineResources":[{"url":"https://data-package.ceh.ac.uk/data/ee577b07-1a2c-4541-bf30-e2ea048e15e1","name":"Download the data","description":"Download a copy of this data","function":"download","type":"OTHER"},{"url":"https://data-package.ceh.ac.uk/sd/ee577b07-1a2c-4541-bf30-e2ea048e15e1.zip","name":"Supporting information","description":"Supporting information available to assist in re-use of this dataset","function":"information","type":"OTHER"}],"pointsOfContact":[{"displayName":"Kieran Khamis","organisationName":"University of Birmingham","organisationIdentifier":"https://ror.org/03angcq70","role":"pointOfContact","email":"k.khamis@bham.ac.uk","fullName":"Kieran Khamis","pointOfContact":"University of Birmingham"}],"publicationDate":"2025-04-28T00:00:00.000Z","publishers":[{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"publisher","email":"info@eidc.ac.uk"}],"resourceIdentifiers":[{"code":"https://catalogue.ceh.ac.uk/id/ee577b07-1a2c-4541-bf30-e2ea048e15e1"},{"code":"10.5285/ee577b07-1a2c-4541-bf30-e2ea048e15e1","codeSpace":"doi"}],"resourceType":{"value":"dataset"},"responsibleParties":[{"displayName":"Kieran Khamis","organisationName":"University of Birmingham","organisationIdentifier":"https://ror.org/03angcq70","role":"pointOfContact","email":"k.khamis@bham.ac.uk","fullName":"Kieran Khamis","pointOfContact":"University of Birmingham"},{"familyName":"Mignanelli","givenName":"L.","organisationName":"University of Birmingham","role":"author","email":"l.mignanelli@bham.ac.uk","fullName":"Mignanelli, L."},{"familyName":"Khamis","givenName":"K.","organisationName":"University of Birmingham","role":"author","email":"k.khamis@bham.ac.uk","fullName":"Khamis, K."},{"familyName":"Bradley","givenName":"C.","organisationName":"University of Birmingham","role":"author","email":"c.bradley@bham.ac.uk","fullName":"Bradley, C."},{"familyName":"Sambrook-Smith","givenName":"G.","organisationName":"University of Birmingham","role":"author","email":"g.smith.4@bham.ac.uk","fullName":"Sambrook-Smith, G."},{"familyName":"Khamis","givenName":"Kieran","organisationName":"University of Birmingham","role":"rightsHolder","fullName":"Khamis, K."},{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"publisher","email":"info@eidc.ac.uk"},{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"custodian","email":"info@eidc.ac.uk"}],"rightsHolders":[{"familyName":"Khamis","givenName":"Kieran","organisationName":"University of Birmingham","role":"rightsHolder","fullName":"Khamis, K."}],"spatialReferenceSystems":[{"code":"http://www.opengis.net/def/crs/EPSG/0/27700","title":"OSGB 1936 / British National Grid"}],"spatialRepresentationTypes":["textTable"],"temporalExtents":[{"begin":"2023-02-01","end":"2023-08-31"}],"title":"UV absorbance of suspended sediments measured in a laboratory using a submersible spectrophotometer","topicCategories":[{"value":"inlandWaters","uri":"http://inspire.ec.europa.eu/metadata-codelist/TopicCategory/inlandWaters"}],"topics":["http://onto.nerc.ac.uk/CEHMD/topic/16"],"type":"dataset","uri":"https://catalogue.ceh.ac.uk/id/ee577b07-1a2c-4541-bf30-e2ea048e15e1","useConstraints":[{"value":"This resource is available under the terms of the Open Government Licence","code":"license","uri":"https://eidc.ac.uk/licences/ogl/plain"}]}