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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">sergeogr</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Российской академии наук. Серия географическая</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2587-5566</issn><issn pub-type="epub">2658-6975</issn><publisher><publisher-name></publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31857/S2587556621020035</article-id><article-id custom-type="elpub" pub-id-type="custom">sergeogr-1279</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Природные процессы и динамика геосистем</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Natural Processes and Dynamics of Geosystems</subject></subj-group></article-categories><title-group><article-title>Количественная оценка плановых переформирований реки Камчатки</article-title><trans-title-group xml:lang="en"><trans-title>Quantitative Assessment of Channel Planform Changes of the Kamchatka River</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чалов</surname><given-names>С. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Chalov</surname><given-names>S. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва.</p></bio><bio xml:lang="en"><p>Moscow.</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чалова</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Chalova</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва.</p></bio><bio xml:lang="en"><p>Moscow.</p></bio><email xlink:type="simple">Aleksandra-1984@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Школьный</surname><given-names>Д. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Shkolnyi</surname><given-names>D. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва.</p></bio><bio xml:lang="en"><p>Moscow.</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский государственный университет имени М.В. Ломоносова, географический факультет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University, Faculty of Geography</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>08</day><month>06</month><year>2021</year></pub-date><volume>85</volume><issue>2</issue><fpage>218</fpage><lpage>230</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Чалов С.Р., Чалова А.С., Школьный Д.И., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Чалов С.Р., Чалова А.С., Школьный Д.И.</copyright-holder><copyright-holder xml:lang="en">Chalov S.R., Chalova A.S., Shkolnyi D.I.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://izvestia.igras.ru/jour/article/view/1279">https://izvestia.igras.ru/jour/article/view/1279</self-uri><abstract><p>Выполнена количественная оценка плановых переформирований 600-километрового участка широкопойменного русла р. Камчатки. На основе полуавтоматического ГИС-дешифрирования космических снимков (архив снимков с 1965 г. по настоящее время) установлено, что протяженность берегов, подверженных размыву, составляет 37% длины левого и 44% длины правого берега. Объем поступающего в результате русловых деформаций материала значительно превосходит сток наносов. Доля бассейновой составляющей оценивается в 45%, русловой — в 55%. Вниз по течению реки по мере снижения уклонов русла уменьшаются темпы размыва берегов. Количественный анализ и прогноз плановых переформирований участка реки требует дифференцированной оценки для разных морфодинамических типов русла, с учетом особенностей русловых процессов на вышележащих участках. Обсуждаются полученные прогностические уравнения размыва берегов для меандрирующего русла и пойменно-русловой многорукавности р. Камчатки.</p></abstract><trans-abstract xml:lang="en"><p>A quantitative assessment of channel planform changes on the 600-km channel of the Kamchatka River was carried out. Possibilities of semi-automatic GIS-interpretation of satellite images were used for retrospective analysis of such an extended section of a large river. It was estimated that 37% of the left bank length and 44% of the right bank length are eroded. The amount of material coming into the channel due to riverbanks erosion significantly exceeds the sediment runoff, which determines channel type and regime of channel changes. Processes of bank erosion vary on the scale of the longitudinal profile and different channel types. Downstream according to decrease of channel slope, a decrease of bank erosion intensity is observed. The most important factor of bank erosion on the river local section is the volume of material coming from the upstream sections. A quantitative analysis and forecast of planform changes of a river section requires a differential assessment for different morphodynamic channel types, taking into account characteristics of channel processes in the upstream river sections. The bank erosion prognostic equations obtained for the meandering channel and the floodplain-channel multiple branches of the Kamchatka River are discussed.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>размывы берегов</kwd><kwd>плановые переформирования</kwd><kwd>сток наносов</kwd><kwd>геоинформационные системы</kwd><kwd>река Камчатка</kwd><kwd>Камчатский край</kwd></kwd-group><kwd-group xml:lang="en"><kwd>bank erosion</kwd><kwd>planform changes</kwd><kwd>sediment yield</kwd><kwd>geoinformation systems</kwd><kwd>Kamchatka River</kwd><kwd>Kachatka krai</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в НИР Лаборатории эрозии почв и русловых процессов: по гранту РНФ (проект № 1817-00086; анализ русловых переформирований р. Камчатки, в частности, на участках разветвленного русла); по гранту РФФИ (проект № 18-05-00487; полевые работы и оценка опасных и экстремальных проявлений русловых процессов).</funding-statement><funding-statement xml:lang="en">The study was supported by the Russian Science Foundation (project no. 18-17-00086; the analysis of channel changes of the Kamchatka River, in particular, on braided channel reaches); by Russian Foundation for Basic Research (project no. 18-05-00487; field study and estimation of hazard and extreme manifestations of channel processes).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Алексеевский Н.И., Айбулатов Д.Н., Косицкий А.Г. Масштабные эффекты изменения стока в русловой сети территории // География, общество и окружающая среда. Т. VI. Динамика и взаимодействия атмосферы и гидросферы. М.: Городец, 2004. 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