Search

In the paper, the frequency and spatial distribution of atmospheric and hydrological droughts over the territory of Belarus in 1945–2020 is assessed. Aridity is evaluated using the standardized precipitation and streamflow indices (SPI and SSFI). Trends in monthly total precipitation are determined, the features of the streamflow formation during the open-channel period are revealed. The frequency of anticyclones that determines hydrometeorological conditions on the territory of Belarus is calculated. The statistically significant increase in the number of the days with anticyclonic weather over the country during the warm season is found. The increasing frequency of dry conditions in summer months against the background of a rise in the precipitation intensity is highlighted. A simultaneous increase in the frequency of very-low-flow periods on rivers and an increase in the height of warm rainfall floods in some river basins are revealed. [ABSTRACT FROM AUTHOR]

The article presents results of monitoring the transboundary transport of pollutants with river water of the Western Dvina River and the Dnieper River basins for the period from 2010 to 2020. The impact of water runoff long-term dynamics on the transboundary surface water quality is discussed. The assessment of the excess transport of pollutants is given, taking into account differences in the values of standard concentrations adopted on the territory of the Russian Federation and the Republic of Belarus. There is an analysis of the differences between the concentrations of substances at the observation stations opened on the border with the Republic of Belarus in 2013–2016 (the Western Dvina in Verkhov'e village; the Dnieper in Khlystovka village, and the Sozh River in Bakharevka village) and at the observation stations away from the border (the Western Dvina in the town of Velizh; the Dnieper in the city of Smolensk, and the Sozh in Khislavichi urban-type settlement) in the paper. The pollution of the catchments with various substances is characterized, and priority indicators that help to recommend some measures to reduce the contamination of catchments with them are identified. [ABSTRACT FROM AUTHOR]