A Comparison between Gaussian Plume Models and Analytical Advection-Diffusion Equation in Unstable Condition

In this paper, comparing between Gaussian plume models and the solution of Advection-diffusion equation in three dimensions using different shapes of dispersion parameters and eddy diffusivities respectively. After that, comparing between Gaussian plume model, proposed model and observed concentrations data which measuring on Egyptian Atomic Energy Authority EAEA for Iodine-135 (I135) in unstable condition.