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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">hydrophysics</journal-id><journal-title-group><journal-title xml:lang="ru">Фундаментальная и прикладная гидрофизика</journal-title><trans-title-group xml:lang="en"><trans-title>Fundamental and Applied Hydrophysics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-6673</issn><issn pub-type="epub">2782-5221</issn><publisher><publisher-name>St. Petersburg Research Center of the Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.59887/2073-6673.2023.16(3)-7</article-id><article-id custom-type="elpub" pub-id-type="custom">hydrophysics-1239</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>ФУНДАМЕНТАЛЬНЫЕ ВОПРОСЫ ГИДРОФИЗИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>FUNDAMENTAL ISSUES OF HYDROPHYSICS</subject></subj-group></article-categories><title-group><article-title>Аналитические исследования динамики «карманного пляжа»</article-title><trans-title-group xml:lang="en"><trans-title>Analytical studies of the dynamics of pocket beach</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0587-4722</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кантаржи</surname><given-names>И. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Kantarzhi</surname><given-names>I. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Измаил Григорьевич Кантаржи</p><p>129337</p><p>Ярославское шоссе, д. 26</p><p>Москва</p><p>РИНЦ Author ID: 1086368</p><p>Scopus Author ID: 6602848417, 57200265787</p><p>WoS Researcher ID: A-1922–2014</p></bio><bio xml:lang="en"><p>129337</p><p>26 Yaroslavl highway</p><p>Moscow</p></bio><email xlink:type="simple">kantardgi@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5010-6239</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Леонтьев</surname><given-names>И. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Leont’ev</surname><given-names>I. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Игорь Олегович Леонтьев</p><p>117997</p><p>Нахимовский проспект, д. 36</p><p>Москва</p><p>РИНЦ Author ID: 58658</p><p>Scopus Author ID: 6603383591</p><p>WoS Researcher ID: R-8051–2016</p></bio><bio xml:lang="en"><p> 117997</p><p>36 Nakhimovsky Prosp.</p><p>Moscow</p></bio><email xlink:type="simple">igor.leontiev@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4186-2753</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Куприн</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuprin</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Васильевич Куприн</p><p>129337</p><p>Ярославское шоссе, д. 26</p><p>Москва</p><p>РИНЦ Author ID: 1101401</p><p>Scopus Author ID: 57222865129</p></bio><bio xml:lang="en"><p>129337</p><p>26 Yaroslavl highway</p><p>Moscow</p></bio><email xlink:type="simple">rtyter55@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский Московский государственный строительный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow State University of Civil Engineering (National Research University) (MSUCE)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт океанологии им. П.П. Ширшова РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Shirshov Institute оf Oceanology, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>19</day><month>10</month><year>2023</year></pub-date><volume>16</volume><issue>3</issue><fpage>93</fpage><lpage>105</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кантаржи И.Г., Леонтьев И.О., Куприн А.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Кантаржи И.Г., Леонтьев И.О., Куприн А.В.</copyright-holder><copyright-holder xml:lang="en">Kantarzhi I.G., Leont’ev I.O., Kuprin A.V.</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://hydrophysics.spbrc.ru/jour/article/view/1239">https://hydrophysics.spbrc.ru/jour/article/view/1239</self-uri><abstract><p>   Исследуется динамика пляжа, расположенного между естественными или искусственными поперечными преградами. Рассматривается пляж, расположенный в северо–восточной части Невской губы Финского залива. В западной части пляжа располагается валунная дамба, которая, однако, не обеспечивает защиту пляжа от размыва, вызванного вдольбереговым переносом наносов. Для обеспечения устойчивости пляжа в рамках проекта «База водных видов спорта в Приморском районе» планируется построить поперечные пляжеудерживающие сооружения.</p><p>   Целью данной работы является прогнозирование динамики береговых процессов рассматриваемого пляжа в новых условиях на срок ближайших двадцати лет.</p><p>   Рассчитан баланс наносов, который для рассматриваемого карманного пляжа состоит из трёх составляющих: объем эрозии, объём аккумуляции и объём байпассинга. По результатам расчетов выяснено, что в новых условиях вдольбереговой поток наносов со временем заметно уменьшается, что обусловлено разворотом контура берега и уменьшением угла волновой равнодействующей относительно береговой нормали. Было получено, что процессы размыва и аккумуляции в новых условиях со временем замедляются. Выдвижение берега в первые годы после строительства демонстрирует высокую скорость, замедляясь со временем. Отступание берега происходит белее равномерно, также со временем замедляясь. Строительство рассматриваемых пляжеудерживающих сооружений позволяет замедлить процессы размыва береговой части «Парка 300–летия Санкт-Петербурга», однако данных мер недостаточно для полной остановки процесса размыва.</p></abstract><trans-abstract xml:lang="en"><p>   The beach site is located in the utmost northeastern part of the Nevskaya Bay. A boulder dam is built on the western side, which, however, fails to protect the beach from the effects of waves that cause longshore sediment transport. The planned construction of transverse beach–retaining structures outlines in the “Water Sports Base in Primorsky District” initiative, mightchange the current situation.</p><p>   This study objective is to predict the evolution of the coastal contour resulting from the planned construction in the next few decades.</p><p>   A natural analogue of such an artificial structure could be a pocket beach located between two natural promontories. The sediment equilibrium at this study location includes three main components: volumes of erosion, accumulation and bypassing. The results include the computed wave patterns and the movement of sediment along the shoreline. The lateral sediment transport diminishes notably over time, driven by the alteration of the shoreline contour and the reduction in the angle between the wave equilibrium and the coastal resultant. The erosion and accumulation volumes increase over time, but their rates slow down. The shoreline displacement becomes more prominent over time; however, the rates of erosion differ from accumulation. The shoreline is moving particularly fast in the first years after construction, and then the process slows down gradually. The introduction of artificial beach protection structures in the 300th Anniversary Park of St. Petersburg will considerably reduce both the pace of beach erosion and the affected area. However, the erosion process will not be completely halted.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>карманный пляж</kwd><kwd>вдольбереговой перенос наносов</kwd><kwd>эволюция берега</kwd><kwd>аккумуляция</kwd><kwd>байпассинг</kwd><kwd>берегозащита</kwd></kwd-group><kwd-group xml:lang="en"><kwd>pocket beach</kwd><kwd>longshore sediment transport</kwd><kwd>shore evolution</kwd><kwd>accumulation</kwd><kwd>bypassing</kwd><kwd>shore protection</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">Отчет 1290–2020.ИГМИ. Технический отчет по результатам инженерно–гидрометеорологических изысканий. АО «Фирма УНИКОМ, 2020.</mixed-citation><mixed-citation xml:lang="en">Report 1290–2020.IGMI. Technical report on the results of engineering and hydrometeorological surveys. 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