Many-year variations of river runoff in the Selenga basin

Many-year variations of river runoff in the Selenga basin are analyzed along with precipitation, potential evapotranspiration, and basin water storages. Data of ground-based (1932–2015) and satellite observations, as well as the analysis of literature data suggest the presence of within-century cycl...

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Veröffentlicht in:Water resources 2017-05, Vol.44 (3), p.359-371
Hauptverfasser: Frolova, N. L., Belyakova, P. A., Grigor’ev, V. Yu, Sazonov, A. A., Zotov, L. V.
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container_end_page 371
container_issue 3
container_start_page 359
container_title Water resources
container_volume 44
creator Frolova, N. L.
Belyakova, P. A.
Grigor’ev, V. Yu
Sazonov, A. A.
Zotov, L. V.
description Many-year variations of river runoff in the Selenga basin are analyzed along with precipitation, potential evapotranspiration, and basin water storages. Data of ground-based (1932–2015) and satellite observations, as well as the analysis of literature data suggest the presence of within-century cycles in the series of annual and minimum runoff. Compared with 1934–1975, the Selenga Basin shows a general tendency toward a decrease in the maximum (by 5–35%) and mean annual (up to 15%) runoff at an increase in the minimum runoff (by 30%), a decrease in the mean annual precipitation (by 12%), and an increase in potential evapotranspiration by 4% against the background of a decrease in evaporation because of lesser soil moisture content and an increase in moisture losses for infiltration because of permafrost degradation. The observed changes in water balance may have unfavorable environmental effects.
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subjects Annual precipitation
Aquatic Pollution
Atmospheric precipitations
Basins
Data processing
Degradation
Earth and Environmental Science
Earth Sciences
Environmental effects
Evaporation
Evapotranspiration
Ground-based observation
Hydrogeology
Hydrology/Water Resources
Infiltration
Moisture content
Permafrost
Precipitation
River discharge
River flow
Rivers
Runoff
Satellite observation
Satellites
Soil
Soil degradation
Soil moisture
Waste Water Technology
Water balance
Water Management
Water Pollution Control
Water Resources and the Regime of Water Bodies
title Many-year variations of river runoff in the Selenga basin
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