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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">RUDN Journal of Ecology and Life Safety</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Ecology and Life Safety</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Экология и безопасность жизнедеятельности</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2313-2310</issn><issn publication-format="electronic">2408-8919</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">36243</article-id><article-id pub-id-type="doi">10.22363/2313-2310-2023-31-3-368-380</article-id><article-id pub-id-type="edn">URUCWJ</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Environmental Monitoring</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экологический мониторинг</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Ecological and chemical assessment of the state of the Desna river by bottom sediments on the example of the Bryansk region, Non-Chernozem region of the Russian Federation</article-title><trans-title-group xml:lang="ru"><trans-title>Эколого-химическая оценка состояния реки Десны по донным отложениям на примере Брянской области Нечерноземной зоны РФ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Plakhotin</surname><given-names>Aleksey S.</given-names></name><name xml:lang="ru"><surname>Плахотин</surname><given-names>Алексей Сергеевич</given-names></name></name-alternatives><bio xml:lang="en">Postgraduate Student, Department of Geography, Ecology and Land Management</bio><bio xml:lang="ru">аспирант кафедры географии, экологии и землеустройства</bio><email>eco_egf@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4842-5174</contrib-id><contrib-id contrib-id-type="spin">6600-6010</contrib-id><name-alternatives><name xml:lang="en"><surname>Anishchenko</surname><given-names>Lidia N.</given-names></name><name xml:lang="ru"><surname>Анищенко</surname><given-names>Лидия Николаевна</given-names></name></name-alternatives><bio xml:lang="en"><p>Professor of the Department of Geography, Ecology and Land Management, Doctor of Agricultural Sciences, Professor</p></bio><bio xml:lang="ru"><p>профессор кафедры географии, экологии и землеустройства, доктор сельскохозяйственных наук, профессор</p></bio><email>eco_egf@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Bryansk State Academician I.G. Petrovski University</institution></aff><aff><institution xml:lang="ru">Брянский государственный университет имени академика И.Г. Петровского</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-09-30" publication-format="electronic"><day>30</day><month>09</month><year>2023</year></pub-date><volume>31</volume><issue>3</issue><issue-title xml:lang="en">VOL 31, NO3 (2023)</issue-title><issue-title xml:lang="ru">ТОМ 31, №3 (2023)</issue-title><fpage>368</fpage><lpage>380</lpage><history><date date-type="received" iso-8601-date="2023-10-04"><day>04</day><month>10</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Plakhotin A.S., Anishchenko L.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Плахотин А.С., Анищенко Л.Н.</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Plakhotin A.S., Anishchenko L.N.</copyright-holder><copyright-holder xml:lang="ru">Плахотин А.С., Анищенко Л.Н.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/ecology/article/view/36243">https://journals.rudn.ru/ecology/article/view/36243</self-uri><abstract xml:lang="en"><p style="text-align: justify;">Studies of the state of bottom soils of the city Desna river (Bryansk) were carried out as part of the recommended studies of state environmental monitoring. The purpose of the work is to identify the current state of the urban watercourse on the basis of ecological and analytical indicators of bottom soils for diagnosing the state of the surface waters of the Desna river. The study of the bottom sediments of the Desna river in the reference areas (cross-sections) showed that the content of heavy metals is within the normal range. The exception is the section of the river in the background region. The excess of concentrations for cobalt and chromium is 8.0 and 1.1 times from the established standards. The highest content of titanium oxide, chromium and cobalt was noted in samples on the right bank of the Desna river in the background area, which indicates that the area is silty. On average, the excess of chromium in spring was 7.5 times, and in summer - 8 times. For cobalt, the excess of the indicator compared to the maximum allowable amounted to 1.1 times throughout the entire spring-summer period. For the first time, the data of three-year studies on the state of bottom sediments are summarized, allowing the development of effective environmental programs and the creation of a constantly updated monitoring base.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Проведены исследования состояния донных грунтов городской реки Десны (Брянск) в рамках рекомендуемых исследований государственного экомониторинга. Цель исследования - выявить современное состояние городского водотока на основе эколого-аналитических показателей донных грунтов для диагностики состояния поверхностных вод реки Десна. Исследование донных отложений реки Десны на реперных участках (створах) показало, что содержание тяжелых металлов находится в пределах нормы. Исключение составляет участок реки в фоновом районе. Превышение концентраций по кобальту и хрому составляет в 8,0 и 1,1 раза от установленных нормативов. Самое высокое содержание оксида титана, хрома и кобальта было отмечено в пробах на правобережье реки Десна фонового участка, что указывает на заиленность участка. В среднем превышение по хрому весной было отмечено в 7,5 раза, а летом - в 8 раз. По кобальту превышение показателя по сравнению с предельно допустимым составило 1,1 раза на протяжении всего весенне-летнего периода. Впервые обобщены данные трехлетних исследований по состоянию донных отложений, позволяющие разрабатывать эффективные природоохранные программы, создать постоянно обновляемую мониторинговую базу.</p></trans-abstract><kwd-group xml:lang="en"><kwd>environmental monitoring</kwd><kwd>urban rivers</kwd><kwd>bottom sediments</kwd><kwd>Non-Chernozem region of the Russian Federation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>экомониторинг</kwd><kwd>городские реки</kwd><kwd>донные отложения</kwd><kwd>Нечерноземье РФ</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Barakata A, El Baghdadia M, Raisa J, Aghezzafb B, Slassi M. Assessment of spatial and seasonal water quality variation of Oum Er Rbia River (Morocco) using multivariate statistical techniques. 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