Fluxes of suspended materials in the North Adriatic Sea (Po Prodelta Area)

Two time-series sediment traps were deployed for 6 months south-east of the Po river delta in 23 m of water at depths of 12 m and 21 m. Temperature, conductivity, salinity, pH, Eh, oxygen, transmittance, wave height, wave speed and current direction were measured. Bottom sediments and river suspende...

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Bibliographic Details
Published in:Water, air and soil pollution air and soil pollution, 1997-10, Vol.99 (1-4), p.557-572
Main Authors: MATTEUCCI, G, FRASCARI, F
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geochemistry
Marine
Marine and continental quaternary
Mineralogy
Silicates
Soil and rock geochemistry
Surficial geology
Water geochemistry
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Summary:Two time-series sediment traps were deployed for 6 months south-east of the Po river delta in 23 m of water at depths of 12 m and 21 m. Temperature, conductivity, salinity, pH, Eh, oxygen, transmittance, wave height, wave speed and current direction were measured. Bottom sediments and river suspended matter were also collected for measurements of organic carbon, aluminium, iron and manganese concentrations, and the partitioning of phosphorus to the solid phase. Vertical fluxes were calculated at 2 water levels, then those of sinking particles were separated into fluxes of river input, primary production and resuspension. This was done by concentrating on the behaviour of particulate organic carbon and manganese. Sediment fluxes and biogeochemical characters of suspended matter were in good agreement with seasonal differences and short-term events such as floods, algal blooms and marine storms. Organic carbon decreased in the water column from 5.13 per cent at 12 m to 2.84 per cent at 21 m. Resuspension and reoxygenation increased the mineralization of organic matter. Adsorption and desorption of phosphorus to fine particles varied with level and in bottom sediments.
ISSN:0049-6979
1573-2932
DOI:10.1007/BF02406895