THE EFFECT OF SYRDARYA RIVER RUNOFF ON THE ECOLOGICAL STATE OF WATERS THE SMALL ARAL SEA
Kurbаniyazov A.K. Barakbaev T.T. Sambaev N.S. Izhitskiy A.S. Kurbаniyazov N.K.
2022National 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
2022#2022Issue 4136 - 151 pp.
This scientific work examines the hydroecological state of the waters of the Syrdarya River and the Small Aral Sea during their ecological degradation. The analysis of the formation of the regime of the aquatic ecosystem under the influence of river water runof afecting salt exchange and metomorphization of the composition of marine waters under the influence of anthropogenic factors is carried out. Annual flows of p. The Syr Darya in the lower reaches is characterized by instability over a long period of time, which is due to both natural and anthropogenic factors. After the construction of the Kokaral dam, the hydroecological state of the Small Aral Sea underwent some changes in relation to the hydrochemical regime of waters. The waters of the Syrdarya river after the growing season are enriched with chemical compounds from runof from irrigation fields. The maximum concentrations of such compounds occur in the low runof of the low-water period of the Syrdarya River, which gives more background pollution with various toxicants in general. In recent years, 4 years from 2017 to 2021, there has been low water in the Aral-Syrdarya basin. The low flow of the Syrdarya River leads to a decrease in the water level in all reservoirs of the basin, in summer periods acute water shortage negatively afects the existence of hydrobionts. The main negative consequences of this influence are a decrease in the concentration of oxygen in the water, an increase in salinity and toxic compounds. Conducting monitoring work to assess the hydroecological state of the aquatic ecosystem allows timely identification of negative impacts.
discharge , hydrochemical , pesticides , runof , Small Aral Sea , Syrdaria River
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Khoja Akhmet Yassawi International Kazakh-Turkish University, Turkеstan, Kazakhstan
Scientific Production Center of Fisheries LLP Aral Branch, Kyzylorda, Kazakhstan
Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russian Federation
BI Group construction company, Turkestan, Kazakhstan
Khoja Akhmet Yassawi International Kazakh-Turkish University
Scientific Production Center of Fisheries LLP Aral Branch
Shirshov Institute of Oceanology
BI Group construction company
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