Suchergebnisse

Specific features of thermal regime of the rivers of the Debed River basin in the cold season (December - March) are considered, as well as the patterns of their temporal fluctuations. Characteristics of the space-time dynamics of air temperature are also presented in order to assess the response of thermal regime to climate change. Observations on water temperature of the rivers of the Debed River basin at 13 gauging stations and on air temperature at 6 meteorological stations were used as the initial data.A correlation was obtained between the average values of water temperature and the air temperature for December - March in the basin of the Debed River. It is shown that water temperature in the cold season is almost always higher than the air temperature. The lowest average monthly water temperature on all rivers is observed at the end of January. And it mainly increases downstream the rivers. For the period from 1964 to 2018 the average water temperature in the cold season ranges from 1,1 to 4,4°С.To calculate water temperatures over the unexplored river sections correlations were obtained between its values for the cold season and the areas of river basins, as well as between the average monthly values of water temperature during the cold period and during other time periods.During 1984-2018 there is a statistically significant increase in air and water temperatures at currently operating meteorological stations and gauging stations. And for the period 1964-1983, both an increase and a decrease in water and air temperatures were recorded, with a predominant increase.The results obtained can be used to calculate the heat flow, to consider the thermal regime of unexplored river basins, and to assess the hydroecological safety of the Debed River basin.