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Abstract <p>The paper presents the results of a comparative geographical and hydrological analysis of long-term fluctuations in air temperature, atmospheric precipitation, annual river runoff, and maximum and minimum monthly runoff in the Don and Ural river basins. It has been shown that, with relatively little change in precipitation, the main factor in hydrological variations over the last few decades (since the 1990s) has been the rise in air temperature during the cold season leading to reduced surface runoff and flood flow. As a result, despite increased runoff during the winter and summer-autumn low water periods, annual river flow in the basins of these rivers decreased significantly between 1992 and 2021, by 31 and 27% relative to the norm at the beginning of the 1960s and by 30 and 15% relative to the 1980 norm, respectively.</p>

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Similarities and Differences in Long-Term Dynamics of Air Temperature, Precipitation, and Runoff in Don and Ural River Basins

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • S. V. Dolgov,
  • N. I. Koronkevich,
  • Zh. T. Sivokhip,
  • V. M. Pavleichik

摘要

Abstract

The paper presents the results of a comparative geographical and hydrological analysis of long-term fluctuations in air temperature, atmospheric precipitation, annual river runoff, and maximum and minimum monthly runoff in the Don and Ural river basins. It has been shown that, with relatively little change in precipitation, the main factor in hydrological variations over the last few decades (since the 1990s) has been the rise in air temperature during the cold season leading to reduced surface runoff and flood flow. As a result, despite increased runoff during the winter and summer-autumn low water periods, annual river flow in the basins of these rivers decreased significantly between 1992 and 2021, by 31 and 27% relative to the norm at the beginning of the 1960s and by 30 and 15% relative to the 1980 norm, respectively.