Home – Home – Jornals – Geography and Natural Resources 2020 number 1

This article presents the results of 30 years (1988-2017) observations of wind-snow interaction processes on the territory of Tomsk oblast. Based on long-term landscape-route snow surveys, it has been established that on the study territory every year there occur wind-driven snow processes similar to aeolian processes in the mechanism of action. An analysis is made of their influence on the soil transformation within the agrolandscapes in the south of Western Siberia. The influence of the various processes and properties of landscape components on snow accumulation conditions in small river basins of the Tom-Yaya in terfluve is outlined. For a detailed study into the wind-driven snow processes within the study territory, we used the key area located within the Basandika small river basin, with the type of nature management characteristic for the southern regions of Western Siberia. The average annual values of temperatures and precipitation amounts were calculated for the study territory, and their trends were determined. An analysis was made of changes in snow cover characteristics: the snow thickness, start of formation and duration. The anti-deflation resistance of soils was calculated and critical wind velocities leading to winter defla tion were identified. The wind regime parameters were determined for a cold period of a year: the frequency of moderate and strong wind velocities, their cyclicity and the activity of wind transport. Accumulative and deflationary aeolian relief-formations in a cold period of a year have been measured and described. Winter deflation of arable soils is assessed on the basis of long-term field observations, and the amount of aeolian snowdrift in the snow thickness is determined. It is concluded that the most intense development of deflation centers and the formation of aeolian ripples on the snow surface are observed in early spring during snowmelt. An analysis was made of the snow samples to reveal a high level of accumulation of soil particles on the snow surface. A predominance of dust fractions was observed in determining the composition of aeolian snowdrift.