ASSESSMENT OF THE RESERVOIRS IMPACT ON THE MAXIMUM RUNOFF OF THE SYRDARYA RIVER
Zhanabayeva A.Z. Narbayeva K.T. Ismailova G.K. Ospanova M.S. Rodrigo-Ilarri J.
2024National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2024#2024Issue 485 - 95 pp.
This article considers the changing of maximum runoff in the Syrdarya River basin considering the influence of the large Shardara reservoir. Hydrological data were used for four gauging station, in the lower, middle and at the beginning part of Kazakhstan in the Syrdarya River. To analyze the hydrological characteristics of the studying basin data from published cadastral materials from the Hydrological Yearbooks were used. To calculate the parameters of the maximum runoff, total integral curves were constructed, and water discharges of rare frequency in different sections of the Syrdarya River were estimated. To construct the availability curves of water discharges the method of truncated distributions was mainly used. Recommendations are proposed for calculating the maximum runoff in different sections. After the creation of reservoir, only part of the multiyear series was used to calculate the maximum runoff in the Syrdarya River with the reservoir on multiyear runoff regulation. The change in the annual maximum runoff of the Syrdarya River in the gauging stations located downstream of the Shardara reservoir, Tomenaryk, Tasboget and Kazaly from 1967 to 2020 was estimated. The results of maximum runoff calculations before and after the construction of the Shardara reservoir are analyzed. The influence of reservoirs on the maximum flow is an urgent problem in the rational use and management of floods, therefore the probabilistic values of the maximum flow of rare occurrence have been clarified. Consequently, for each period, the probabilistic values of runoff characteristics of different availability were identified based on the construction of distribution curves. Changes in the maximum runoff averaged from 20 % (downstream of the Shardara reservoir) to 32 % (Kazaly village) in the direction of reduction. Results obtained are useful for planning and conducting project work and for the development of measures to protect areas from flooding.
availability curve , maximum runoff , reservoirs , series heterogeneity , statistical method
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Department of Meteorology and hydrology, Al-Farabi Kazakh National University, Almaty, Kazakhstan
Department of Meteorology and hydrology, Kazakh National Agrarian Research University, Al-Farabi Kazakh National University, Almaty, Kazakhstan
Department Water resources and melioration Instituto de Ingeniería del Agua y Medio Ambiente (IIAMA), Kazakh National Agrarian Research University, Universitat Politècnica de València, Valencia, Spain
Department of Meteorology and hydrology
Department of Meteorology and hydrology
Department Water resources and melioration Instituto de Ingeniería del Agua y Medio Ambiente (IIAMA)
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