We use a deterministic approach to simulate summer hydrothermal regime of a stream. Our simple model involves calculating water temperature in a coordinate system moving with the water. The physically based estimation of water heat budget takes into account absorption of solar radiation by water surface, emission of thermal infrared radiation (TIR) by water and absorption of atmospheric TIR, as well as convective heating of water and heat loss due to evaporative processes. The proposed model is applied to simulate stable diurnal thermal regime of the Yenisei River, employing the Fourier equation for mathematical modeling. We assess the contribution of each of the physical processes into water temperature and come up with a stable temporal diurnal thermal regime for the Yenisei River.
In this paper, we calculated the air quality index (AQI) for 2018 based on data from automated observation posts located in the city of Krasnoyarsk. The influence of individual components (pollutants) on the index value is analyzed.
The problem of the gas ionization in the field of resonant laser radiation taking into account the radiation transfer is numerically solved. The free electrons are formed due to the mechanism of associative ionization. These electrons then collect energy through superelastic processes and initiate the avalanche ionization of the medium by electronic impact. An influence of resonant radiation transfer on kinetics of plasma formation on resonance transition of sodium atom with wavelength 589,6 nm is investigated.