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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">serp</journal-id><journal-title-group><journal-title xml:lang="ru">Эрозия почв и русловые процессы</journal-title><trans-title-group xml:lang="en"><trans-title>Soil erosion and river channel processes</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">3034-4638</issn><publisher><publisher-name>Limited Liability Company “Expert laboratory ”Hydroinformational systems”</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.71367/3034-4638-2025-2-3-33-41</article-id><article-id custom-type="elpub" pub-id-type="custom">serp-43</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>Статьи</subject></subj-group></article-categories><title-group><article-title>«МЕАНДР» И «ИЗЛУЧИНА» КАК МОРФОЛОГИЧЕСКИЕ ЕДИНИЦЫ ПЛАНИМЕТРИИ МЕАНДРИРУЮЩЕГО РУСЛА: АНАЛИЗ СУЩЕСТВУЮЩИХ ПРЕДСТАВЛЕНИЙ</article-title><trans-title-group xml:lang="en"><trans-title>«MEANDER» AND «BEND» AS MORPHOLOGICAL UNITS OF PLANIMETRY OF A MEANDERING CHANNEL: AN ANALYSIS OF EXISTING CONCEPTS</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>Замышляев</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Zamyshlyaev</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Замышляев Виталий Иванович, кандидат технических наук, научный сотрудник отдела русловых процессов</p><p>199004, 2-я линия В.О., д. 23</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Zamyshlyaev Vitaly Ivanovich, Candidate of technical sciences (PhD), Researcher at the Department of Channel Processes</p><p>199004, St. Petersburg, Vasilyevsky Island, 2nd line, 23</p></bio><email xlink:type="simple">viza51@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Государственный гидрологический институт»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>FSBI «State Hydrological Institute»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>04</day><month>11</month><year>2025</year></pub-date><volume>0</volume><issue>3</issue><fpage>33</fpage><lpage>41</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Замышляев В.И., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Замышляев В.И.</copyright-holder><copyright-holder xml:lang="en">Zamyshlyaev V.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://journal.sediment.ru/jour/article/view/43">https://journal.sediment.ru/jour/article/view/43</self-uri><abstract><p>Статья посвящена описанию и сравнению двух подходов, применяемых при изучении планиметрии русел меандрирующих рек методами гидроморфологического анализа: подход, разработанный и широко применяемый в советской (российской) школе исследований руслового процесса, в которой за основную морфологическую единицу русла меандрирующей реки принимается излучина, и подход, в котором основной морфологической единицей является меандр, – этот подход более распространен в исследованиях зарубежных авторов. Показывается, что первый подход, определяющий излучину как участок русла между двумя последовательными точками перегиба осевой линии русла, позволяет однозначно идентифицировать излучины по картографическим материалам. В то же время формулировки, используемые во втором подходе, в большинстве случаев не позволяют даже точно идентифицировать участок русла, определяемый как меандр. Более того, внутри второго подхода можно выделить два способа определения меандра, в одном из которых за меандр принимается участок русла между тремя последовательными точками перегиба осевой линии русла, а во втором – участок русла между двумя последовательными вершинами, лежащими по одну сторону от осевой линии пояса меандрирования. Ввиду все более широкого внедрения полуавтоматических и автоматических процедур в проведение гидроморфологического анализа точность идентификации анализируемых объектов приобретает дополнительную важность. Исходя из этого, концепция «излучина» представляется более определенной, технологичной и надежной, чем концепция «меандр», а потому при проведении морфометрического анализа и поиске закономерностей изменений плановой конфигурации меандрирующих русел есть смысл основываться преимущественно на подходе, использующем в качестве основной морфологической единицы излучину.</p></abstract><trans-abstract xml:lang="en"><p>The article is devoted to the description and comparison of two approaches used in the study of the planimetry of meandering channels by methods of hydromorphological analysis: the approach developed and widely used in the Soviet (Russian) school of channel process research, in which the bend is taken as the basic morphological unit of a meandering channel, and the approach in which the basic morphological unit is the meander – this approach it is more common in the works of foreign authors. It is shown that the first approach, which defines a river bend as a section of the channel between two successive inflection points of the channel centerline, allows for unambiguous identification of bends during the processing of cartographic materials. At the same time, the formulations used in the second approach, in most cases do not even allow for precise identification of the section of the channel defined as a meander. Moreover, within the second approach, there are two methods for defining a meander. One method defines a meander as a section of the channel between three successive inflection points of the channel centerline, while the other method defines it as a section between two consecutive apexes lying on one side of the axial line of the meandering belt. Given the increasing use of semi-automated and automated procedures in conducting of hydromorphological analysis, it is becoming increasingly important to accurately identify the objects being analyzed. Therefore, the concept of «bend» seems to be more certain, technologically advanced and reliable than the concept of «meander». So, when conducting morphometric analysis and searching for patterns in the plan configuration of meandering channels, it would make sense to rely primarily on the approach that uses the bend as the main morphological unit.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>русловые процессы</kwd><kwd>ГИС-анализ</kwd><kwd>осевая линия русла</kwd><kwd>точки перегиба</kwd><kwd>системы измерителей для излучин и меандров</kwd></kwd-group><kwd-group xml:lang="en"><kwd>channel process</kwd><kwd>GIS analysis</kwd><kwd>channel centerline</kwd><kwd>inflection points</kwd><kwd>systems of planimetric indexes for bends and meanders</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Кондратьев Н.Е. 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