Plume Dispersion Simulation in Low-Wind Conditions Using Coupled Plume Segment and Gaussian Puff Approaches

Abstract

Short-range diffusion experiments conducted at Idaho National Engineering Laboratory in light-wind stable conditions have been simulated using a mathematical model that combines plume segment and Gaussian puff approaches. The model is shown to describe reasonably well the situations such as in run 12 wherein the plume resulted in nonzero concentrations only on a 100-m arc and not on 200- and 400-m arcs in a particular sector. The results obtained have been found to be encouraging in terms of accuracy of agreement with the observed values. Results obtained from the model have been evaluated using some statistical measures and compared with two steady-state models based on constant and variable diffusivities.