In this paper, we report sedimentation and accumulation rates determined from a replicate sediment core collected within a wetland of a lagoon system (Pialassa Baiona) - located in the proximity of the North Adriatic Sea - by using the natural radionuclide 210Pb, along with supporting measurements of total organic carbon (TOC). The vertical profile of excess 210Pb (=210Pbtotal-226Ra) decreased exponentially, resulting in sedimentation rate of 0.20 cm/year in the last decades. The fluctuations in excess 210Pb activities correlate closely to the organic carbon (TOC) content of the sediments, likely reflecting historical variations or changes in sediment delivery into the lagoon system.

Recent patterns of sediment accumulation in a lagoon ecosystem (Pialassa Baiona, Italy): evidence from 210Pb activity and sedimentary organic carbon.

GUERRA, ROBERTA;RIGHI, SERENA
2007

Abstract

In this paper, we report sedimentation and accumulation rates determined from a replicate sediment core collected within a wetland of a lagoon system (Pialassa Baiona) - located in the proximity of the North Adriatic Sea - by using the natural radionuclide 210Pb, along with supporting measurements of total organic carbon (TOC). The vertical profile of excess 210Pb (=210Pbtotal-226Ra) decreased exponentially, resulting in sedimentation rate of 0.20 cm/year in the last decades. The fluctuations in excess 210Pb activities correlate closely to the organic carbon (TOC) content of the sediments, likely reflecting historical variations or changes in sediment delivery into the lagoon system.
ECOMONDO 2007 - La cultura e le tecnologie ambientali in Italia ed in Europa. Gestione e nuove tecnologied di trattamento delle acque e dei fanghi di depurazione - Gestione e bonifica dei siti contaminati - Emissioni industriali ed immissioni: i nuovi problemi posti dalle particelle ultrafini - Monitoraggio e biomonitoraggio. Atti dei seminari.
360
364
Guerra R.; Righi S.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/49801
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