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WATER AND ALLUVIUM OF A SMALL RIVER WITHIN THE URBAN TERRITORY: CHEMICALPOLLUTIONстатья
- Автор: Bogdanov N.A.
- Журнал: International Journal of Development Research
- Том: 10
- Номер: 01
- Год издания: 2020
- Первая страница: 33553
- Последняя страница: 33557
- Аннотация: Available online at http://www.journalijdr.com International Journal of Development Research Vol. 10, Issue, 01, pp. 33553-33557, January, 2020 ISSN: 2230-9926 WATER AND ALLUVIUM OF A SMALL RIVER WITHIN THE URBAN TERRITORY: CHEMICAL POLLUTION *Bogdanov Nikolay Aleksandrovich Laboratory of Geomorphology – Institute of Geography, RAS (IG RAS), Moscow, Russia ARTICLE INFO ABSTRACT The article contains the results of the assessment of chemical pollution in water and bottom sediments of the Tvertsa River across Tver city 2.5-5 km from its influx into the Volga River. The Tvertsa has domestic, drinking, recreational and fishery importance; receives some amount of municipal sewage. Sanitary hygienic standards in water were exceeded slightly: up to 1.5 times in some places by the indicators of biological (BOD5) and chemical (COD) oxygen consumption because of the oxidation of organic substances and 2.7-5 times all over the places by Fe content (from 0.42-0.95 mg / l in the river to 1.53 mg / l in the runoff). Fishery standards are exceeded 1.2-15 times: Fe, Mn, Cu, Co, Ni, petroleum products (PP), suspended substances (S.s), COD and BOD5. The instability in chemical concentrations is largely due to seasonal fluctuations of the water content, including the effects of steady rains. The state of bottom sediments in this section of the river was recorded for the first time. The level of total accumulation (Zc) of metals (Fe, Co, Cu, Ni, Zn, Cd, Mn) and PP was in the “low” category (Zc = 0.8-6.5). The water of the Tvertsa will not have a negative impact on the ecological and sanitary hygienic state of the Volga River. In fisheries the situation may be get worse by the introduction of toxic metals Cu, Co, Ni into the receiving watercourse. Copyright © 2020, Bogdanov Nikolay Aleksandrovich. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Citation: Bogdanov Nikolay Aleksandrovich. 2020. “Water and alluvium of a small river within the urban territory: chemical pollution”, International Journal of Development Research, 10, (01), 33553-33557 Acknowledgments The work was performed under the theme of the State Task No. 0148-2019-0005, No. АААА-А19-119021990091-4 (Institute of Geography, RAS).
- Добавил в систему: Богданов Николай Александрович