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

<https://data.danubius-ri.eu/dataset/4fe2849b-854d-400e-9513-8d41d44ff256> a dcat:Dataset ;
    dct:description """This study evaluated the surface water quality of selected Danube River sectors (km 549-990) in the RO13 Cazane–Călărași area using direct field measurements. The research was conducted within the framework of the national project *“Optimizing the sustainable management of natural resources, enhancing water security, and increasing the resilience of ecosystems in the Lower Danube Basin, impacted by climate change and anthropogenic interventions”* (PN 23 30 03 03).

A multiparameter EXO 2 probe (YSI, USA) was used to analyze key physico-chemical parameters, while hydrocarbon concentrations (Oil in Water and HC micro-g/L) were assessed using PAH probes. Results indicate that most water quality parameters remain within environmental standards, classifying the waters as either "Very Good" or "Good." Temperature (15.03–24.40°C) and pH (7.92–8.36) remained stable, while dissolved oxygen levels (7.01–9.43 mg/L) and chlorophyll concentrations (0.27–1.49 RFU) suggested low risk of eutrophication. Conductivity (262.53–411.56 µS/cm), TDS (207.56–280.80 mg/L), and salinity (0.15–0.21 psu) confirmed freshwater conditions. Turbidity values (2.44–28.75 FNU) and oxidation-reduction potential (-26.59 to 238.79 mV) indicated relatively stable conditions. Hydrocarbon levels (0.03–1.46 mg/L) were within acceptable environmental limits, though localized variations suggested potential pollution sources. These findings emphasize the need for long-term monitoring and transboundary collaboration to address localized pollution concerns and ensure sustainable water management in the Danube Basin
""" ;
    dct:identifier "oai:zenodo.org:17054438" ;
    dct:issued "2026-04-06T14:31:58.846190"^^xsd:dateTime ;
    dct:modified "2026-04-06T14:31:58.846198"^^xsd:dateTime ;
    dct:publisher <https://data.danubius-ri.eu/organization/ec913e37-f6b7-4f2c-8827-17550dc315c5> ;
    dct:title "Physicochemical and Hydrocarbon Data on Surface Water Quality of the Romanian Sector of the Danube River: 2024 Campaign (September-October) PN 23 30 03 03, National Project" ;
    dcat:landingPage <https://doi.org/10.5281/zenodo.17054438> .

<https://data.danubius-ri.eu/organization/ec913e37-f6b7-4f2c-8827-17550dc315c5> a foaf:Agent ;
    foaf:name "GeoEcoMar" .

<https://doi.org/10.5281/zenodo.17054438> a foaf:Document .