Twenty years of Pallanza Bay history described by analysis of sediment core samples
The recent history of Pallanza Bay has been investigated on the basis of sediment core samples. The observed sedimentation rate corresponds to 15 mm uncompacted sediment per year, and the rate has been estimated using 137-Cs as an indicator. The concentrations of S, C and Cd, Cr, Hg, Ni, Pb and Zn measured in the sliced sediment core samples, indicate a net tendency towards decrease during the five years of sediment deposition. In particular, the mercury concentration decreased from 10.6 to 0.38 mg/kg, most probably due to reduced input from the earlier observed point sources and, in all probability. as a consequence of massive dredgings at the mouth of river Toce. The concentrations of other trace elements show a similar behaviour.
Bibliographic Reference: Article: Cultura e Scuola (1996)
Record Number: 199610473 / Last updated on: 1996-05-20
Original language: it
Available languages: it