Dispersion of pollutants in aquatic media

The aim of the work presented in this thesis is to provide a qualifiedcalculation model suitable for risk assessment of radioactive pollution tothe Suez canal environment.In the theoritical part, a model developed by J.M. Abril (Universityof Seville, Dept. of Applied Physics, Spain) is selected and adapted forthe Suez canal case. This choice is based on the fact that this model isapplied by the same author to study the radionuclide dispersion in theTinto and Odiel rivers (in Spain) These rivers have particularities whichexists in Suez canal.The selected ev.aluation model is adapted for the Suez canal case. Acomputer code based on this model is supplied by the IAEA to carry outthis adaptation. The adjustment of the selected model is performedthrough the determination of a set of suitable physical parameters suchas: geometry, bathymetry, tidal water elevations, water flow velocities,... etc. These values are introduced as basic parameters in thiscalculation code. Sensitivity analysis is performed to evaluate thesquared velocity correction factor.In the experimental part, measurements concerning the mechanismof dispersion of radioactive pollutants in Suez canal is performed. Thiswork included: injecting Rhodamine dye in Suez canal, following up thedye cloud, collecting water samples at different times, measuring theconcentrations and finally analyzing the experimental results.Valuesdispersionmeasured.of physical parameters for the Shallufa area such as thecoefficient, distribution coefficient and turbidity areTherefore, the model is verified through the comparison ofexperimentally measured values and computed values of some physicalparameters such as: tidal water elevations, mean water velocity, plume