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Changes in Water Balance Elements in the Basins of the Largest Tributaries of Lake Baikal in the Late XX–Early XXI Century

  • WATER RESOURCES AND THE REGIME OF WATER BODIES
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Abstract

Long-term variations in the water balance were analyzed in the basins of 20 largest tributaries of the Baikal. The values of river runoff were derived from actual data on the period from 1976 to 2019, and those of evaporation, precipitation, and potential evaporation, from ERA5-Land reanalysis since 1976 to 2020. Data were obtained to show an increase in the potential evaporation in all analyzed drainage basins by values from 0.39 to 0.62% per year since 1976 to 2020. A moderate or statistically insignificant decrease is typical of precipitation (0.25 to 0.59% per year) and water discharges, mostly due to a decrease in the summer runoff at a rate of 5.6%/10 years. The possible role of changes in vegetation cover in these processes was studied by evaluating NDVI parameter in 2019 compared with 2002 by data of space surveys MOD13A3 and MYD13A3 with MODIS spectroradiometer of Terra and Aqua satellites. A conclusion was made about the key role of precipitation in the decrease in the maximal runoff in Lake Baikal basin.

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Funding

The study was carried out under the Development Program of Interdisciplinary Scientific-Educational School at the Moscow State University “The Future of the Planet and Global Environmental Changes,” according to Research Plans (Governmental Order) of the N.I. Makkaveev Research Laboratory of Soil Erosion and Channel Processes, Faculty of Geography, Moscow State University, project 121051200166-4.

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Authors and Affiliations

  1. Faculty of Geography, Moscow State University, 119991, Moscow, Russia

    S. R. Chalov, I. S. Denisova & V. Yu. Grigor’ev

  2. Water Problems Institute, Russian Academy of Sciences, 119333, Moscow, Russia

    I. S. Denisova & V. Yu. Grigor’ev

Authors
  1. S. R. Chalov
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  2. I. S. Denisova
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  3. V. Yu. Grigor’ev
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Correspondence to S. R. Chalov, I. S. Denisova or V. Yu. Grigor’ev.

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Chalov, S.R., Denisova, I.S. & Grigor’ev, V.Y. Changes in Water Balance Elements in the Basins of the Largest Tributaries of Lake Baikal in the Late XX–Early XXI Century. Water Resour 50, 779–786 (2023). https://doi.org/10.1134/S0097807823700185

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  • DOI: https://doi.org/10.1134/S0097807823700185

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