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Patterns and Models of Variability in the Useful Inflow into Lake Baikal

  • RESEARCH IN THE BAIKAL WATERSHED
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Abstract—

An attempt has been made to construct models that approximate the time-range statistical properties of the useful inflow into Lake Baikal and its relationships with potential predictors that permit predictive assessments to be obtained. The problem solution consists of two parts. In the first part, the constructed physical and statistical models record the known patterns of runoff from the catchment. These patterns are subject to significant regression relationships between the predicted value of the monthly inflow and its hydrometeorological predictors. These models can be used to forecast the average useful inflow for the next month. The predictive correction for interannual variability to the seasonal inflow wave in these models is based on variability in the predictor values that are known at the forecasting time. The second part of the research is focused on possible trends and cycles in the interannual variability in useful inflow in the most water-abundant third quarter in order to predict it with a lead time of 1 year or more. Various cycle models with parameters estimated using the training sampling set do not provide a stable solution in the control sampling set. The best result has been obtained by a cyclical model with fixed periods, which records the possible impact on the inflow variability provided by gravitational influence of the Moon and major planets on the Earth and the Sun. Nevertheless, this model also should not be considered statistically significant due to the small proportion of the explainable variance and insufficiency of the data on useful inflow into Baikal.

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Funding

This work was carried out under the research project of the Sochava Institute of Geography, Siberian Branch, Russian Academy of Sciences (project no. 0347-2016-003), and under the Scientific Cooperation Contract between the Institute of Geography, Siberian Branch, Russian Academy of Sciences, and the Siberian Regional Research Hydrometeorological Institute of the Ministry of Natural Resources and Ecology of the Russian Federation.

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Correspondence to A. V. Ignatov or N. N. Zavalishin.

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Translated by E. Maslennikova

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Ignatov, A.V., Zavalishin, N.N. Patterns and Models of Variability in the Useful Inflow into Lake Baikal. Geogr. Nat. Resour. 42, 37–43 (2021). https://doi.org/10.1134/S187537282101008X

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  • DOI: https://doi.org/10.1134/S187537282101008X

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