STUDY OF THE INFLUENCE OF DRAIN REGULATION BY THE RESERVOIR OF THE CASCADE OF THE VILUIAN HYDROPOWER STATIONS - I, II ON THE WATER REGIME OF RIVER VILYUY

Abstract

Based on the use of a joint linear model for the formation of surface and river flows and a hydrologically correct digital relief model for the river basin. Vilyui, the influence of the Vilyui reservoir on the river flow of the river is considered. The results of long-term modeling of natural and regulated runoff based on data from the global MERRA reanalysis database for the period 1985-2005 are presented. Model results are compared with observations of water flow from the R-Arcticnet archive. According to the statistical criteria for the efficiency of the Nash-Sutcliff calculation Eff and the Bias systematic error, the joint linear model based on the correct model hydrographic network allows reproducing hydrographs of daily and monthly flows with good quality. This requires the calibration of two correction factors to the temperature of the surface air and to the redistribution of moisture content between the surface and underground runoff.