A problem of surface waves simulation is considered there in the context of combating oil spills. Being independent of waves penetrating into water, oil is disposed in sea as floating surface slicks and as drops suspended in water thickness. An oil surface slick incurs of transferring by wind and current actions, on the one hand, and of a variety of transforming processes, on the other hand. Gravitational spreading is one of the most influent transforming processes for oil on the sea surface. Among physical problems, there are dynamics of thin films of petroleum products on the sea surface and the need to consider moving on the waved sea-atmosphere border. The oil penetration into the water thickness occurs during the dispersion process --- of the transfer of oil from the water surface to the water phase as a result of wave collapse. The carried away oil splits into drops of different sizes which spread and diffuse into the water thickness. The factors such as droplet size, buoyancy, and turbulence affect dispersion stability. The main sources of dispersion energy are collapsing waves formed by wind on the surface of a water body. We suggest using a 2D surface wave model based on the dynamics of interacting particles. In contrast to complex hydrodynamic and spectral models, that makes it possible to estimate quite simply and effectively the proportion of dispersed oil pollution carried from the surface to the depth of the sea area.
The urgency of present problem is caused by necessity of operative control of biological sewage treatment processes. At present these processes are realizing in aeration tanks of sewage treatment plants both municipal and of large enterprises. A process of biological treatment is being checked by chemical analysis practically by hand. By the way a duration of checking procedure is commensurable with the time the sewage water is passing through an aeration tank. Thus any operative control of sewage treatment is practically impossible. In the present work it is proposed to use for operative control the hardware- software complex (HSC) AQUATEST-AT4M, that is able to produce an analysis of water quality in some minutes. By the way the measurement data give an opportunity to identify a mathematical model of these biological sewage treatment. In this work there are presented the results of experiments and of mathematical modelling of work of the Kirov City communal systems sewage treatment plants (KCS STP).
The use of informational systems to estimate the required amount of chemicals for the dispersion of surface pollution is a fruitful approach in implementations of emergency response plans. A mathematical model of the processes of destruction of pollution on a water surface is an integral part in such a system and a source of accumulation of information about the evolution of pollution in various environmental conditions and characteristics of the source of pollution. Examples of the results of modeling the processes of surface pollution propagation when exposed to surface waves are presented, as well as a set of stored information for estimating the required amount of reagents.
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