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A. M. Nikanorov L. P. Sokolova O. S. Reshetnyak M. Yu. Kondakova A. O. Danilenko 《Russian Meteorology and Hydrology》2010,35(4):281-288
The results of calculation and analysis of the inflow of dissolved chemical substances to the estuarine area of the Northern
Dvina River are considered. Based on the long-term regime hydrochemical information of the State Service of Observation and
Monitoring of the Natural Environmental State, the anthropogenic load of dissolved chemical substances on the estuarine area
and on the estuarine coastal water is estimated per inflow volumes. The extent of the water environment pollution of the near-delta
part of the Northern Dvina River and its delta is estimated. The distribution of pollutant inflow among arms and channels
in delta is under consideration. 相似文献
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A. M. Nikanorov L. I. Minina V. A. Bruzgalo L. S. Kosmenko M. Yu. Kondakova O. S. Reshetnyak A. O. Danilenko 《Water Resources》2016,43(5):791-802
Many-year variations of water pollution and the state of more than two hundred of rivers (or their segments) in different latitudinal zones in European Russia are estimated. In accordance with latitudinal zonality, space and time trends in variations of water quality and the state of rivers are identified. By the level of water pollution, most river ecosystems (or their segments) were classified as polluted and very polluted, very polluted and dirty, dirty and very dirty. A tendency toward water quality improvement could be seen in the recent decade. More than 50% of the examined river ecosystems are at the transitional state of passing from natural (and/or equilibrium) to crisis state. 相似文献
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The authors describe the principles and method used in compiling a map of game animal resources for the Midlands region, the name given to the middle segment of the Soviet Union comprising West Siberia, Kazakhstan and Central Asia. The results make it possible to recommend the optimal use of game resources and to identify future prospects of the trapping and hunting economy. Translated from: Vestnik Moskovskogo Universiteta, geografiya, 1982, No. 5, pp. 17-23. 相似文献
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The authors propose a series of general methodological guidelines for animal habitat mapping. These include the use of “summary” indicators (of aggregate effects of environmental conditions on animal populations) as indices for mapping, the combination of laboratory and field work at all but the smallest scales of mapping, and explicit recognition (based on extensive studies of ecological characteristics and life cycles of species being mapped) that habitat boundaries in many cases vary dramatically from vegetation and landscape-geological boundaries. Habitat maps of two study areas are compared with vegetation and landscape maps at identical scales to demonstrate these differences. Translated from: Vestnik Moskovskogo Universiteta, geografiya, 1985, No. 3, pp. 95-101. 相似文献
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Morphology and mineralogical and geochemical compositions of freshwater ferromanganese nodules of Ol’khon Island (Sasa Formation) and Kulunda Plain (Lake Porozhnee) were studied. The study has shown rhythmic structures of the nodules, formed by macro- and microlayers with mineralized microflora. The layers are composed of either crystalline Mn mineral phases and finely dispersed Fe phases (Lake Porozhnee) or, on the contrary, crystalline goethite and X-ray amorphous Mn phases (Ol’khon Island). Separation of Mn and Fe mineral phases in the nodules proceeded during their formation and diagenesis. The freshwater nodules show both high (Lake Porozhnee) and low (Ol’khon Island) Mn/Fe ratios. The predominance of Fe phase in the Ol’khon nodules accounts for their high contents of REE, including Ce. The Porozhnee nodules grew, most likely, more rapidly, which is reflected in their low REE contents and Ce anomaly. The examined chemical and mineral compositions, textures, and structures of the nodules testify to the low-temperature hydrothermal source of their ore substance. 相似文献
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Solotchina E. P. Kuzmin M. I. Solotchin P. A. Maltsev A. E. Leonova G. A. Danilenko I. V. 《Doklady Earth Sciences》2019,487(1):745-750
Doklady Earth Sciences - The results of this study on carbonate-containing bottom sediments of the shallow brackish Lake Itkul, West Siberia, are presented. The study methods applied included X-ray... 相似文献
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