Dr. Alla Krylova Profile

Dr. Alla Krylova

at ICMiMG SB RAS

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Proceedings Article | 16 December 2021 Paper

Modeling of the long-term annual and seasonal runoff in the Lena river basin

Alla Krylova, Natalya Lapteva

Proceedings Volume 11916, 119165P (2021) https://doi.org/10.1117/12.2603165

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On the basis of the conceptual climatic model of the river runoff, the modeling of the long-term annual and seasonal runoff in the Lena river basin for the period of 1980 - 2009 has been carried out. The model was applied to a schematized hydrographic network based on a hydrologically correct digital elevation model of the Lena River basin. Using independent sources of meteorological and hydrological data and distinguishing between three homogeneous runoff fluctuations in landscape-hydrological regions in the basin, we obtained a qualitative correspondence of the simulated hydrograph of the annual and seasonal runoff with the observational data for the selected period. This period is characterized by an increase in air temperature, atmospheric precipitation and changing conditions of underground feeding of the rivers of this basin. Over the entire study period, the model annual and seasonal runoff increased at the outlet sections of the Lena, Vilyuy and Aldan rivers. The main contribution to the increase in the winter low-water runoff in the lower reaches of the Lena has been found to be due to the runoff from the Vilyui river basin.

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