Dynamic processes in Venice region outlined by environmental isotopes. (Articolo in rivista)

  • Dynamic processes in Venice region outlined by environmental isotopes. (Articolo in rivista) (literal)
  • 2004-01-01T00:00:00+01:00 (literal)
  • 10.1080/10256010310001652007 (literal)
Alternative label
  • Zuppi G.M.; Sacchi E. (2004)
    Dynamic processes in Venice region outlined by environmental isotopes.
    in Isotopes in environmental and health studies
  • Zuppi G.M.; Sacchi E. (literal)
Pagina inizio
  • 1 (literal)
Pagina fine
  • 11 (literal)
  • 40 (literal)
  • ISI Web of Science (WOS) (literal)
  • Dipartimento di Scienze Ambientali, Universita` Ca'Foscari di Venezia, Dorsoduro 2137, 30123, Venezia, Italy; Dipartimento di Scienze della Terra, Universita` degli Studi di Pavia, Italy (literal)
  • Dynamic processes in Venice region outlined by environmental isotopes. (literal)
  • Research carried out in the last 40 years has shown the scientific importance of groundwater circulation both in the Northern Adriatic sea bed and within the uppermost sedimentary layers of the Venice lagoon and of the Venice plain. Hydrodynamic processes are strictly controlled by a well-cemented sedimentary horizon lying under and around Venice ('caranto'), which plays the role of regional aquitard. This layer was attributed to the subaerial cementation of the Flandrian (8-10ka Before Present) sedimentary surface. The caranto is generalised as a continuum horizon, being an easy explanation for several environmental, hydrogeological and geotechnical problems, e.g., a base layer for landfills, a confining layer for deep aquifers and the best substratum for locating the oak wooden pile-dwelling needed to support the largest buildings. The preservation of the isotope signal within the deep aquifers and aquiclude system records the changes in surface and groundwater characteristics and suggests the present and past recharge regimes. In this region, the heavily perturbed hydrodynamic conditions do not allow for the use of isotopic signals to derive a correct reconstruction of the present recharge, The perturbations induced by the intensive anthropogenic activity force to follow climate evolution by considering deep groundwater and pore waters. In addition, the presence of carbonatic rocks inside terrigeneous sediments affects the reconstruction of the past. Results indicate that carbonatic rocks are created by seepage, through the sediments, of gaseous carbon compounds from decaying organic layers. The gas interactions with the intra-sedimentary saline and fresh waters produce CO(2), inducing the cementation of the sediments. (literal)
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