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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">geomorf</journal-id><journal-title-group><journal-title xml:lang="ru">Геоморфология и палеогеография</journal-title><trans-title-group xml:lang="en"><trans-title>Geomorfologiya i Paleogeografiya</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2949-1789</issn><issn pub-type="epub">2949-1797</issn><publisher><publisher-name></publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31857/S0435-42812019357-67</article-id><article-id custom-type="elpub" pub-id-type="custom">geomorf-1425</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>Научные сообщения</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Short communications</subject></subj-group></article-categories><title-group><article-title>Моделирование изменчивости песчаного пляжа при взаимодействии волн с подводным валом</article-title><trans-title-group xml:lang="en"><trans-title>Modeling the dynamics of a sand beach governed by the wave and underwater bar interaction</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>Кузнецова</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuznetsova</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">olga.ku-ocean@yandex.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>Сапрыкина</surname><given-names>Я. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Saprykina</surname><given-names>Ya. V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">saprykina@ocean.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт океанологии имени П.П. Ширшова РАН; Государственный океанографический институт имени Н.Н. Зубова Росгидромета</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Shirshov Institute of Oceanology RAS; Zubov Oceanographic Institute of RosHydromet</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт океанологии имени П.П. Ширшова РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Shirshov Institute of Oceanology RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>08</day><month>10</month><year>2019</year></pub-date><volume>0</volume><issue>3</issue><issue-title>Геоморфология</issue-title><fpage>57</fpage><lpage>67</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кузнецова О.А., Сапрыкина Я.В., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Кузнецова О.А., Сапрыкина Я.В.</copyright-holder><copyright-holder xml:lang="en">Kuznetsova O.A., Saprykina Y.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://geomorphology.igras.ru/jour/article/view/1425">https://geomorphology.igras.ru/jour/article/view/1425</self-uri><abstract><p>С помощью математического моделирования исследовано влияние положения подводного вала на морфодинамику песчаного пляжа бесприливного моря в масштабе времени до 20 ч. За основу был выбран рельеф болгарского побережья Черного моря в районе поселка Шкорпиловцы. Результаты моделирования были верифицированы по данным натурных наблюдений. Обнаружено, что наибольшее отступание уреза наблюдается в первый час. Для выбранного режима волнения (высота значительных волн 1.5 м, период — 10.5 с) через 6 часов происходит  формирование равновесного профиля, содержащего подводную террасу с уклоном, близким к теоретическому профилю равновесия Дина. Показано, что положение подводного вала влияет на интенсивность отступания уреза. Наименьшее отступание берега будет при положении вала на расстоянии порядка 0.7–0.8 от длины волны, соответствующей периоду пика спектра волн, определяемому по дисперсионному соотношению линейной теории волн на глубокой воде. Наибольшее отступание уреза будет наблюдаться при положении вала на расстояниях, близких к половине длины волн. Установлено, что отступание уреза зависит от высоты инфрагравитационных волн и среднего периода волнения: чем меньше средний период и больше высота инфрагравитационных  волн вблизи берега, тем меньше отступание уреза. Расстояние выноса наносов в море находится в прямой зависимости от высоты значительных волн у берега.</p></abstract><trans-abstract xml:lang="en"><p>Effect of bar position on underwater profile of sandy beach was studied at the timescale of one storm using the xBeach numerical model. Beach profiles were extracted from the bathymetry of the Shkorpilovtsy beach (the Bulgarian coast of the Black Sea). Computed results were verified by field measurements. The largest shoreline retreat occurred in the first hour of a storm. For the chosen wave regime (largest wave height 1.5 m, wave period 10.5 s), an equilibrium profile was formed after 6 hours. The resulting profile contained an underwater terrace with the slope close to that of the theoretical equilibrium profile. It was shown that the position of the underwater bar affects the shoreline retreat rate. The smallest and the largest shore retreat occur if bar crest is located at a distance about 0.7–0.8 and 0.5 of the deep water wavelength, correspondingly. It was found that the shoreline retreat depends on the height of infragravity waves and mean wave period: the smaller mean wave period and the higher infragravity  waves near the coast, the smaller is the retreat of the coastal line. Distance of seaward sediment transfer is directly relates to the height of large waves near the shore.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>профиль равновесия</kwd><kwd>береговая зона</kwd><kwd>волновые деформации</kwd><kwd>моделирование</kwd><kwd>“модель xBeach”</kwd><kwd>трансформация волн</kwd></kwd-group><kwd-group xml:lang="en"><kwd>equilibrium profile</kwd><kwd>coastal zone</kwd><kwd>xBeach</kwd><kwd>wave transformation</kwd><kwd>underwater bar</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания (тема № 0149-2019-0005) и при частичной поддержке РФФИ (проекты № 16-35-00542, 18-55-45026).</funding-statement><funding-statement xml:lang="en">Present paper is a part of the state assignment (subject No. 0149-2019-0005), financially supported by the RFBR (projects No. 16-35-00542, 18-55-4502).</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">Леонтьев О. 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