Author(s)

R. Rajar & A. Sirca

Abstract

Role of mathematical models and of field measurements in solving water quality problems is described. When simulating phenomena in different space and time scales there are some important differences, regarding forcing factors, time averaging and measuring technique. Two case studies are presented: (a) Modelling of mercury cycling in Trieste Bay. 2D Hydrodynamic model Is used together with a sedimentation model and with a mercury mass transport model. Simulation of several bio-chemical processes as methylation, demethylation, reduction and sedimentation is included, (b) Long term simulations of transport-dispersion of radioactive pollutants in Japan sea is described. Thermohaline forcing, wind forcing, and inflow currents are taken into account. Results are in good agreement with measurements. 1 Modelling in Differ

Keywords