Atmospheric dispersion modelling of dust emissions from the dried bottom of the Aral Sea

Abstract

The problem of spreading of harmful emissions from the dried part of the Aral Sea is extremely relevant for the Central Asian region, but it is also important for other countries of the near and far abroad in view of the transboundary transport of pollutants in the atmosphere. In order to solve the problem of predicting the distribution of the concentration of air pollutants, researchers are usually use mathematical tools. Modelling the processes of transport and diffusion of pollutants in the atmosphere claims to address various factors, such as weather and climate conditions, soil erosion, physic and mechanical properties of aerosol particles, etc. Thus, this study was aimed to develop a model and computational algorithm for solving the problem. The particular attention was paid to the description of wind erosion since most emissions in the Aral Sea region occur by the removal of salt-dust particles from the soil surface. There were conducted a series of computational experiments using the developed mathematical apparatus. The obtained results presented in the paper are illustrating the influence of various factors on the process of atmospheric dispersion. Comparison of the results of computational experiments with experimental data showed sufficient agreement, which confirms the adequacy of the developed mathematical model of the process of spreading of fine aerosol particles in the atmosphere.

The task of assessing the risk in the operation of a complex free formal system

“…Numerical modeling showed that both direct problems, when the output variables of the problem were considered unknown -the maximum temperature inside the storage facility and the duration of the period when the specified temperature level was exceeded, are correctly posed. The value of the learning error did not exceed 1% [13][14][15]. In contrast, all six inverse / combined problems turned out to be incorrect with a learning error of 25-35%.…”

The process of distribution Computer modeling of hazardous substances in the atmosphere taking into account the terrain relief

“…Suppose there is no pressure gradient. If the first equation from the Navier -Stokes system is differentiated concerning z, the second concerning x, then we obtain [18][19][20]:…”