The dynamics of changes in the water flow of the Gunt river for the periods 1944-1979 and 1980-2015 are analyzed and the decreasing trend of the runoff for the whole observation period (1944-2015 years) is determined. It was found that the hydrograph of the Gunt river is characterized by the presence of two maxima corresponding to June and August months of the year. It is assumed that they correspond to the contribution of melting snow cover in June and glaciers in August. The contribution of groundwater to the formation of river flow is not excluded. The trend of temperature change has the increasing character with a speed of 0.13 ^оС /year. For the period 1944-2015, the amount of precipitation retained average value of about 285 mm. It is found that the period 1980-2015 is opposite to the period 1944-1979 characterized by decreasing trend of precipitation. Snow cover and small-scattered glaciers of the basin now make the main contribution to the formation of the runoff of the Gunt river. Winter runoff is mainly formed by groundwaters.

Normatov Parviz Inomovich, Candidate of Sciences (Geography), Senior Lecturer, Tajik National University, 17, Rudaki av., Dushanbe, 734025, Tajikistan, e-mail:norparviz89@gmail.com 

Odinaev Qodirjon Nodirovich, Assistant, Tajik National University, 17, Rudaki av., Dushanbe, 734025, Tajikistan, e-mail: zar.rakhimov@mail.ru 

Normatov Inom Sherovich, Corresponding Member AS of Republic Tajikistan, Professor, Tajik National University, 17, Rudaki av., Dushanbe, 734025, Tajikistan, e-mail:inomnor@gmail.com

Normatov P.I., Odinaev Q.N., Normatov I.Sh. The Change of the Hydrological Characteristics of the Gunt River in Dependence of Meteorological Conditions. The Bulletin of Irkutsk State University. Series Earth Sciences, 2020, vol. 32, pp. 103-112. https://doi.org/10.26516/2073-3402.2020.32.103 (in Russian)

Chevallier P., Pouyaud B., Mojaïsky M. et al. River flow regime and snow cover of the Pamir Alay (Central Asia) in a changing climate. Hydrol. Sci., 2014, vol. 59, pp. 1491-1506.

Dietz A., Conrad C., Kuenzer C., et al. Identifying Changing Snow Cover Characteristics in Central Asia between 1986 and 2014 from Remote Sensing Data. Remote Sens., 2014, vol. 6, pp. 12752-12775.

Immerzeel W.W., Pellicciotti F., Bierkens M.F.P. Rising river flows throughout the twenty-first century in two Himalayan glacierized watersheds. Nat. Geosci., 2013, vol. 6, pp. 742-745.

Kaab A., Treichler D., Nuth C., Berthier E. Brief communication: Contending estimates of 2003–2008 glacier mass balance over the Pamir–Karakoram–Himalaya. Cryosphere, 2015, vol. 9, pp. 557-564.

Kapnick S.B., Delworth T.L., Ashfaq M., et al. Snowfall less sensitive to warming in Karakoram than in Himalayas due to a unique seasonal cycle. Nat. Geosci., 2014, vol. 7, pp. 1-7. 

Knoche M., Lindner M., Meier Ch., et al. Glacier retreat accounts for more than 25 percent of summer runoff in the central Pamirs. Geophysical Research Abstracts, 2014. vol. 16, pp. 132-156.

Knoche M., Ralf Merz R. Bridging Glaciological and Hydrological Trends in the Pamir Mountains, Central Asia. Water, 2017, vol. 9, no. 422, pp. 1-28.

Komatsu T., Watanabe T. Glacier-Related Hazards and Their Assessment in the Tajik Pamir: A Short Review. Geograph. Studies, 2013, vol. 88, no. 2, pp. 117-131.

Pohl E., Gloaguen R., Andermann Ch., Knoche M. Glacier melt buffers river runoff in the Pamir Mountains. American Geophysical Union Publication: Water Resources Research, 2017, pp. 2467-2489. 

Pohl E., Knoche M., Gloaguen R., et al. Sensitivity analysis and implications for surface processes from a hydrological modelling approach in the Gunt catchment, high Pamir Mountains. Earth Surf. Dyn., 2015, vol. 3, pp. 333-362.

Pohl E., Gloaguen R., Seiler R. Remote sensing-based assessment of the variability of winter and summer precipitation in the Pamirs and their effects on hydrology and hazards using harmonic time series analysis. Remote Sens., 2015, vol. 7, no. 8, pp. 9727–9752.

Pu Z., Xu L., Salomonson V.V. MODIS/Terra observed seasonal variations of snow cover over the Tibetan Plateau. Geophys. Res. Lett., 2007, vol. 34, pp. L06706-L06714.

Sharif M., Archer D.R., Fowler H.J., Forsythe N. Trends in timing and magnitude of flow in the Upper Indus Basin. Hydrol. Earth Syst. Sci., 2013, vol. 17, pp.1503-1516.

Tarasova L., Knoche M., Dietrich J., Merz R. Effects of input discretization, model complexity and calibration strategy on model performance in a data-scarce glacierized catchment in Central Asia. Water Resour. Res., 2016, vol. 52, pp. 4674-4699.