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L. M. Sorokovikova V. N. Sinyukovich I. V. Tomberg G. I. Popovskaya N. V. Bashenkhaeva N. P. Sez’ko N. A. Zhuchenko 《Geography and Natural Resources》2016,37(3):220-227
Field observations showed that the characteristics of chemical composition of waters and the development of plankton algae in the lakes within the delta of the Selenga river are determined by their flowage. The most open Lake Nekipelovskoe communicates with the Selenga outlets throughout a year, and Lake Zavernyaikha only at the period of an open channel. Lake Semenovskoe and Lake Khlystov Zaton are located in the islands and are isolated from the outlets. According to composition of main ions, the lakes under investigation refer to the hydrocarbonate class, the calcium group. The sum of ions in the water of Lake Nekipelovskoe approaches the one in the Selenga (86?221 mg/dm3), and the highest sums of ions were recorded in the wintertime in the lakes isolated from the outlets (446?743 mg/dm3). The lakes of the delta are characterized by a high trophicity. The maximum concentrations of total phosphorus in Lake Nekipelovskoe and Lake Zavernyaikha were 68 and 122 μg mg/dm3, and in Lake Semenovskoe and Lake Khlystov Zaton ?0.8 and ?0.63 μg mg/dm3, respectively. The most intense development of algae is observed in Lake Zavernyaikha, which is due to the high population of Baikal endemics. Lake Zavernyaikha showed a close negative correlation between the concentration of NO 3 ? , mineral phosphorus and phytoplankton biomass; the correlation coefficient was ?0.8 and ?0.63, respectively. The lakes exhibited increased contents readily hydrolysable organic matter, and a decrease in dissolved oxygen concentration in winter; hydrogen sulfide was repeatedly recorded in Lake Khlystov Zaton. The water quality in the lakes during the springtime varies from “quite clean” to “weakly polluted”; at low-water periods, especially in winters, it can drop to the category of “exceedingly dirty”. The water quality of the Selenga can be influenced by the lakes during spring floods when material accumulated during the wintertime is transported to the river outlets and further to Lake Baikal. 相似文献
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L. M. Sorokovikova V. N. Sinyukovich I. V. Tomberg 《Russian Meteorology and Hydrology》2010,35(10):700-705
Changes in chemical runoff of the main tributary of Lake Baikal, the Selenga River, observed since the mid-1990s, and determinant
factors of these changes are under consideration. The estimates derived are indicative of a 20–40% reduction in the annual
removal of dissolved substances because of a decrease in the water runoff of the river due to climate oscillations. The decreased
inflow to Lake Baikal of mineral substances, especially silicon, nitrogen, and phosphorus, can lead to disturbance of production
processes in Lake Baikal. 相似文献
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Concentrations of major ions in surface waters of the rivers of Khara-Murin and Snezhnaya are compared based on data of many-year observations carried out in the 1950s and 2000s. The concentrations of HCO 3 ? , Cl?, Ca2+, Mg2+, Na+ + K+ are shown to be stable. A considerable increase in SO 4 ?2 concentration was revealed. 相似文献
4.
L. M. Sorokovikova G. I. Popovskaya I. V. Tomberg N. V. Bashenkhaeva 《Water Resources》2009,36(4):443-452
Specific features of the concentration dynamics of biogenic substances, organic C, and phytoplankton in the lower reaches of the Selenga and its delta branch are identified. The quantitative and qualitative changes in these components are demonstrated for the conditions of extremely low water abundance. High correlation was shown to exist between variations of the concentrations of nitrate N, mineral P, and phytoplankton biomass. 相似文献
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L.M. Sorokovikova V.N. Sinyukovich O.G. Netsvetayeva I.V. Tomberg N.P. Sezko 《Geography and Natural Resources》2009,30(1):35-39
The dynamics of the entry of sulfates and nitrate nitrogen into Lake Baikal together with its influent waters is outlined. Changes in the discharge of chemical components by large water streams are largely determined by the entry of ingredients as part of effluents. It is shown that the current increase in the flow of pollutants from the atmosphere has a dramatic effect on chemical composition of water in small rivers of Southern Baikal with low mineralization. 相似文献
6.
K. G. Rubinshtein M. M. Smirnova R. Yu. Ignatov I. M. Gubenko R. V. Arutyunyan D. A. Pripachkin V. N. Semenov O. S. Sorokovikova V. M. Shershakov 《Russian Meteorology and Hydrology》2016,41(5):326-334
The estimates of 137Cs emissions from the accident happened in Elektrostal at the beginning of April 12, 2013 are presented. The transport of radionuclides and their dry and wet deposition on the surface are computed using the Lagrangian stochastic model of the NOSTRADAMUS software package worked out by Nuclear Safety Institute of Russian Academy of Sciences. Prognostic fields of wind (horizontal and vertical components) in the lower troposphere, precipitation, and vertical and horizontal turbulence diffusivity coefficients in the lower atmosphere (up to 4 km) were used as input data. Prognostic fields were obtained using the WRF-ARW numerical mesoscale model. 相似文献
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V. V. Parfenova O. N. Pavlova I. A. Terkina M. Yu. Suslova T. Ya. Kostornova I. G. Nikulina V. N. Sinyukovich L. M. Sorokovikova 《Water Resources》2005,32(2):204-208
The distribution and abundance of some groups of saprophytic microorganisms in bottom sediments of Selenga Delta area were investigated. The species composition of 57 strains of the genus Pseudomonas was determined. The distribution of Actinomycetes in sediments was found to be uneven, they were represented by the genera Streptomyces and Micromonospora. Formation of the microbial community in bottom sediments of the investigated area is influenced by the Selenga River.Translated from Vodnye Resursy, Vol. 32, No. 2, 2005, pp. 227–231.Original Russian Text Copyright © 2005 by Parfenova, Pavlova, Terkina, Suslova, Kostornova, Nikulina, Sinyukovich, Sorokovikova. 相似文献
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L. M. Sorokovikova G. I. Popovskaya I. V. Tomberg V. N. Sinyukovich O. S. Kravchenko I. I. Marinaite N. V. Bashenkhaeva T. V. Khodzher 《Russian Meteorology and Hydrology》2013,38(2):126-133
Based on the comprehensive hydrochemical and hydrobiological studies of the Selenga River near the Naushki settlement carried out in 2010, the quality of water flowing from the territory of Mongolia is assessed. The comparison with the results of the previous years indicates that the water quality deteriorated due to the intensification of economic activity in the river basin and unfavorable climatic factors. 相似文献