Development and validation of a dry deposition model.

摘要

The evaluation of the downwind deposition of particulate released to the atmosphere is a complex problem. The removal of particulate from a plume is called plume depletion. Plume depletion by dry deposition is the removal of particulate from a plume due to air-surface interactions.; Gaussian dispersion mathematical models for estimation of the ground concentration from this air surface interaction are not rigorously developed. The method proposed in this dissertation for plume depletion by dry deposition uses a multi-parameter method for particle transport and removal from the plume and could enhance the predictive capabilities of current dispersion model. This new dry deposition model is identified as the Stratified Transport Assessment of Multiple Parameters (STAMP). The STAMP model for evaluation of dry deposition uses a transport methodology that sections the plume centerline mass into two layers.; The layers are called the transport layer and the depletion layer. The rate of removal from the plume is controlled by the deposition velocity of the depletion layer. The rate of increase in mass in the depletion layer is varied with the deposition velocity for the transport layer.; The STAMP model for plume depletion by dry deposition provides an enhanced framework to establish a predictive model for atmospheric transport of material and has already been incorporated into the Radiological Safety Analysis Computer Program (RSAC). The work of this dissertation was the development of the STAMP model and its validation.