Abstract

Long-term observation series of hydrological and climatic parameters should be obtained to solve the problems of assessing and forecasting the hydrological regime of river basins. In the absence of surface measurements of these parameters, reanalysis data can be used. The paper presents a comparison of the runoff magnitude and the consistency of runoff dynamics based on the observational data of gauging stations and the ERA5-Land and TerraClimate reanalysis data for seven rivers of Western Siberia (the left-bank tributaries of the Yenisei located in the zones of taiga and forest-tundra). Spearman’s rank correlation coefficients for seasonal and annual runoff between the data of reanalysis and the actual data are equal to 0.35-0.98. The normalized root-mean-square error of annual runoff according to the reanalysis ranges from 13 to 21%. The values of errors and correlation coefficients depend on geographic location and area of the basins and vary during a season.

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