Venice: Sea-Lagoon Exchange in a Modified Tide Regime

Science  20 Apr 1979:
Vol. 204, Issue 4390, pp. 261-264
DOI: 10.1126/science.204.4390.261


Salinity and tide heights recorded for a month at P0, a point in the northern section of the Venetian lagoon, are the basic experimental data used to construct a numerical model which describes the salinity variations at P0 as a function of the tides measured at the Lido entrance. The time variation of the salinity pattern iss interpreted in terms of a lagoon system in which a freshwater source of constant intensity is in a quasi-steady equilibrium with a tide-modulated sink. The mean residence time of a contaminant in this simulated lagoon is predicted from the change in the salinity pattern due to a reduction in the entrance size.