Climate-related Changes in Hazardous and Adverse Hydrological Events in the Russian Rivers

V. A. Semenov

Regional peculiarities of the direction of climate-related changes in the maximum and minimum river runoff in Russia in the 20th century, frequency and duration of dangerous inundations with economic damage, floods, mudflows as well as lack of water, and low-water periods are under consideration. It is found that for the first years of the 21st century, compared to the last decade of the 20th century, frequency and duration of hazardous inundations during high waters and floods increased in the Upper Ob and Kama river basins, during high waters, in the rivers of the Far East Primorye and Sakhalin, in the Northern Caucasus, the danger induced by mudflows and rain floods increased. In the Lena and Yenisey river basins, the flood hazard was preserved in the case of ice clogging. At the same time, in the Western Siberian, Trans-Baikal, the Amur, and Kolyma basins the frequency of periods with extremely shallow water significantly increased.