Ecological Systems and Devices Annotation << Back THREE-DIMENSIONAL NON-STATIONARY MATHEMATICAL MODEL OF POLLUTION OF A CHANNEL WITH DEPOSITING SOLID DISPERSIVE IMPURI-TIES D.A. Tukmakov The paper presents a non-stationary three-dimensional mathematical model of the process of diffusion of deposited particles in a channel, obtained using the method of separation of variables. The diffusion process was calculated for various particle sizes. The results of calculations of the concentration of dispersed pollution calculated for various Shezy numbers are considered. Longitudinal distributions of the silt height formed by settled particles are determined for various methods of calculating the Chezy numbers. It has been determined that depending on the method of calculating the Shezy number, the height of the deposited polydisperse suspension fluff varies. Keywords: mathematical modeling, inhomogeneous media, diffusion, sedimentation. DOI: 10.25791/esip.11.2022.1332 Pp. 26-35.