The changes of the low-flow discharge of the rivers of permafrost zone of Central Siberia under the influence of the climate

This research is devoted to the question of change of a low-flow drain of the rivers under the influence of the climate. The purpose of the re-search was the analysis of change of a winter low-flow drain of the rivers of the permafrost zone of Central Siberia under the influence of climate, de-tection of dependence of the minimum drain on the complex of hydroclimatic parameters. To the analy-sis stock materials were drawn UGMS data long-term observations of runoff at eight hydrological stations and the precipitation at the meteorological stations of the studied area, the duration of the se-ries of observations at individual facilities was more than 50 years. In the processing and analysis of data for construction of the dependence of the low-flow runoff from climatic factors the method of mul-tiple regression analysis was used. The analysis of hydrological models demonstrated that the winter low-flow drain of the studied rivers substantially was connected with a liquid atmospheric precipita-tion during the warm period and with air tempera¬ture during the period from August to February. For reservoirs the increase in the minimum drain was connected with growth of a liquid atmospheric pre-cipitation and growth of October air temperatures. In the formation of a certain minimum flow took part periodically thawing permafrost moisture in spring-summer period the upper soil horizons, especially clearly this relationship manifested itself in the combination with the fallout of the liquid precipita-tion, penetrating to the horizon of freezing and thawing of permafrost causing.