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Long-term changes of water balance components in the basins of rivers fed by snow and ice

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Abstract

The variability of the main components of the annual water balance (precipitation, evaporation, glacial alimentation, and dynamic water reserves in the basin) for 1935–1990 is, for the first time, determined for the area where the Zeravshan runoff is formed, higher than hydrological post Dupuli is located. Long-term data on the annual Zeravshan River runoff from an area of 10 200 km2 were derived from the measurements at Dupuli hydrological post. The other water balance components were determined with the help of computation methods. Comparison of the measured and calculated volumes of the annual runoff demonstrated that a relative difference between them is systematic, and as a whole for a computation period it is in the interval from −0.31 to −4.78%. The annual balance of accumulation and thawing of solid precipitation on glaciers and in the extraglacial area is also determined in the Zeravshan River basin. A new method for computing and mapping spatial variability of the maximum snowline altitude is developed.

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Authors and Affiliations

  1. Institute of Geography, Russian Academy of Sciences, Staromonetnyi per. 29, Moscow, 109017, Russia

    V. G. Konovalov

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  1. V. G. Konovalov
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Original Russian Text © V.G. Konovalov, 2007, published in Meteorologiya i Gidrologiya, 2007, No. 8, pp. 77–89.

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Konovalov, V.G. Long-term changes of water balance components in the basins of rivers fed by snow and ice. Russ. Meteorol. Hydrol. 32, 529–537 (2007). https://doi.org/10.3103/S1068373907080092

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  • DOI: https://doi.org/10.3103/S1068373907080092

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