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Hydrological regime on European Russia transforms drastically answering recent climate changes. Recent climate change result in dramatic transformation of hydrological regime on European Russia. The main reason of change of river runoff regime lies in changes of atmospheric circulation in the study region. Statistical and spatial analysis of data from 300 gauging stations reveals strong reduction in seasonal flood volume, especially in the west (>40% and 15-30% for the Don River and Volga River basins, correspondingly) whereas relatively stable flood volume is detected for the eastern rivers (Kama, Ural). Seasonal flood reduction is widely accompanied by increase in low flow. Change in climatic conditions has led to considerable changes in the all characteristics of the water regime of the rivers of the ETR, and thereby changes in annual and seasonal run-off.