PREFIX rdf: PREFIX rdfs: PREFIX skos: PREFIX owl: PREFIX xsd: PREFIX dcterms: PREFIX dcat: PREFIX dcmitype: PREFIX foaf: PREFIX geo: PREFIX vcard: PREFIX prov: PREFIX odrs: PREFIX sosa: PREFIX sdo: PREFIX ef: PREFIX doo: PREFIX adms: PREFIX : :ee577b07-1a2c-4541-bf30-e2ea048e15e1 dcterms:title "UV absorbance of suspended sediments measured in a laboratory using a submersible spectrophotometer" ; dcterms:identifier "https://catalogue.ceh.ac.uk/id/ee577b07-1a2c-4541-bf30-e2ea048e15e1","https://doi.org/10.5285/ee577b07-1a2c-4541-bf30-e2ea048e15e1" ; dcterms:bibliographicCitation "Mignanelli, L., Khamis, K., Bradley, C., Sambrook-Smith, G. (2025). UV absorbance of suspended sediments measured in a laboratory using a submersible spectrophotometer. NERC EDS Environmental Information Data Centre. https://doi.org/10.5285/ee577b07-1a2c-4541-bf30-e2ea048e15e1" ; dcterms:description "This dataset contains information about submersible absorbance sensor responses to varying suspended sediment concentration, grain size and organic content. 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. The work was supported by the Natural Environment Research Council (Grant NE/X011178/1)." ; dcterms:provenance [ a dcterms:ProvenanceStatement ; rdfs:label "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. The 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. Each 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. All 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)." ] ; dcterms:spatial [ a dcterms:Location ; dcat:bbox "POLYGON((-2.092 52.386, -2.092 52.545, -1.733 52.545, -1.733 52.386, -2.092 52.386))"^^geo:wktLiteral ; ] ; dcterms:temporal [ a dcterms:PeriodOfTime ; dcat:startDate "2023-02-01"^^xsd:date ; dcat:endDate "2023-08-31"^^xsd:date ; ] ; dcat:contactPoint :ee577b07-1a2c-4541-bf30-e2ea048e15e1_c0 ; dcterms:publisher ; dcterms:subject , "Suspended sediment", "Optical sensors" ; prov:wasGeneratedBy :ee577b07-1a2c-4541-bf30-e2ea048e15e1_fund0 ; a dcat:Dataset; dcterms:type dcmitype:Dataset ; dcterms:available "2025-04-28"^^xsd:date ; dcat:landingPage , ; dcterms:license ; dcterms:accessRights ; dcterms:theme ; dcat:distribution [ dcat:accessURL ; dcterms:license ; dcterms:accessRights ; dcterms:format [ a dcterms:IMT ; rdf:value "Comma-separated values (CSV)" ; rdfs:label "Comma-separated values (CSV)" ] ; ]; dcterms:creator :ee577b07-1a2c-4541-bf30-e2ea048e15e1_a0, :ee577b07-1a2c-4541-bf30-e2ea048e15e1_a1, :ee577b07-1a2c-4541-bf30-e2ea048e15e1_a2, :ee577b07-1a2c-4541-bf30-e2ea048e15e1_a3 ; dcterms:language . :ee577b07-1a2c-4541-bf30-e2ea048e15e1_c0 a foaf:Person ; foaf:name "Kieran Khamis" ; vcard:hasEmail "k.khamis@bham.ac.uk" ; foaf:member ; . a foaf:Organization ; foaf:name "NERC EDS Environmental Information Data Centre" ; vcard:hasEmail "info@eidc.ac.uk" ; foaf:member ; . :ee577b07-1a2c-4541-bf30-e2ea048e15e1_a0 a foaf:Person ; foaf:name "Mignanelli, L." ; foaf:familyName "Mignanelli" ; foaf:givenName "L." ; vcard:hasEmail "l.mignanelli@bham.ac.uk" ; foaf:member [foaf:name "University of Birmingham"] ; . :ee577b07-1a2c-4541-bf30-e2ea048e15e1_a1 a foaf:Person ; foaf:name "Khamis, K." ; foaf:familyName "Khamis" ; foaf:givenName "K." ; vcard:hasEmail "k.khamis@bham.ac.uk" ; foaf:member [foaf:name "University of Birmingham"] ; . :ee577b07-1a2c-4541-bf30-e2ea048e15e1_a2 a foaf:Person ; foaf:name "Bradley, C." ; foaf:familyName "Bradley" ; foaf:givenName "C." ; vcard:hasEmail "c.bradley@bham.ac.uk" ; foaf:member [foaf:name "University of Birmingham"] ; . :ee577b07-1a2c-4541-bf30-e2ea048e15e1_a3 a foaf:Person ; foaf:name "Sambrook-Smith, G." ; foaf:familyName "Sambrook-Smith" ; foaf:givenName "G." ; vcard:hasEmail "g.smith.4@bham.ac.uk" ; foaf:member [foaf:name "University of Birmingham"] ; . a skos:Concept; skos:prefLabel "Water quality"; rdfs:label "Water quality" . a foaf:Organization ; foaf:name "University of Birmingham" . :ee577b07-1a2c-4541-bf30-e2ea048e15e1_fund0 a prov:Activity ; rdfs:label "OFSTORM" .