Low-water situations on the mountain rivers in the Uzbekistan Republic: causes and specific features
Abstract
River flow fluctuations are often cyclic, like many other natural processes. The pattern of the high-water and low-water years grouping is a characteristic feature of river runoff, especially in low-water period or lowflow periods. By processing multi-year time series of average monthly and average annual water consumption data for 38 mountain rivers of the Republic of Uzbekistan, the parameters of extreme hydrological events during the period of low runoff were calculated. These events were identified by the characteristics of runoff hydrograph sections beyond the specified threshold values of water consumption (90% probability). Parameters of low-water periods are related to various hydrological characteristics, first of all, specific features of river feeding. It was demonstrated that the amount of water reserves in snow cover at the end of February and March or the total amount of precipitation during the cold period could be indicators of hydrological drought for mountain rivers of Uzbekistan. Possible trends of changes of these parameters are considered.
Supporting agencies: The study was accomplished under the scientific cooperation of land hydrology departments of the Lomonosov Moscow State University and the Mirzo Ulugbek National University of Uzbekistan.
About the Authors
D. M. Turgunov
Mirzo Ulugbek National University of Uzbekistan
Uzbekistan
Uzbekistan
Senior Lecturer, PhD
Faculty of Geography and Natural Resources, Department of Land Hydrology
A. A. Sazonov
Lomonosov Moscow State University
Russian Federation
Russian Federation
Senior Lecturer
Faculty of Geography, Department of Land Hydrology
F. K. Khikmatov
Mirzo Ulugbek National University of Uzbekistan
Uzbekistan
Uzbekistan
Head of the Department, Professor, D.Sc. in Geography
Faculty of Geography and Natural Resources, Department of Land Hydrology
N. L. Frolova
Lomonosov Moscow State University
Russian Federation
Russian Federation
Head of the Department, Professor, D.Sc. in Geography
Faculty of Geography, Department of Land Hydrology
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Review
For citations:
Turgunov D.M., Sazonov A.A., Khikmatov F.K., Frolova N.L. Low-water situations on the mountain rivers in the Uzbekistan Republic: causes and specific features. Lomonosov Geography Journal. 2020;(1):23-34. (In Russ.)
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