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The features of the influence of reservoirs built in the 1950s-1990s on the Kama, Don, Yenisei and Vilyui rivers, which characterized by significantly different water regimes, on annual hydrographs of daily water discharges, as well as on annual and seasonal runoff in average, extremely low-water and high-water years, are studied. The estimates are based on a comparison of the characteristics of the naturalized and anthropogenic-modified runoff. To restore the flow hydrograph close to the conditions of the natural water regime, the authors used the method of G.P. Kalinin-P.I. Milyukov (1958), which is based on a linear model describing the relationship between water flow rates at the inlet and outlet of the calculated section of the river.