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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">gtcrust</journal-id><journal-title-group><journal-title xml:lang="ru">Геодинамика и тектонофизика</journal-title><trans-title-group xml:lang="en"><trans-title>Geodynamics &amp; Tectonophysics</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2078-502X</issn><publisher><publisher-name>Institute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.5800/GT-2023-14-6-0734</article-id><article-id custom-type="elpub" pub-id-type="custom">gtcrust-1764</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>СОВРЕМЕННАЯ ГЕОДИНАМИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>RECENT GEODYNAMICS</subject></subj-group></article-categories><title-group><article-title>БПЛА АЭРОФОТОСЪЕМКА ПРИ МОНИТОРИНГОВЫХ ИССЛЕДОВАНИЯХ БЕРЕГОВЫХ ГЕОСИСТЕМ ЮГА ИРКУТСКОГО АМФИТЕАТРА</article-title><trans-title-group xml:lang="en"><trans-title>UAV AERIAL SURVEY IN MONITORING OF COASTAL GEOSYSTEMS IN THE SOUTHERN IRKUTSK AMPHITHEATRE</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>Мазаева</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Mazaeva</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>664033, Иркутск, ул. Лермонтова, 128</p></bio><bio xml:lang="en"><p>128 Lermontov St, Irkutsk 664033</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>Юрьев</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Yuriev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>664033, Иркутск, ул. Лермонтова, 128</p></bio><bio xml:lang="en"><p>128 Lermontov St, Irkutsk 664033</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>Бабичева</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Babicheva</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>664033, Иркутск, ул. Лермонтова, 128</p></bio><bio xml:lang="en"><p>128 Lermontov St, Irkutsk 664033</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт земной коры СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of the Earth’s Crust, Siberian Branch of the 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>14</day><month>12</month><year>2023</year></pub-date><volume>14</volume><issue>6</issue><fpage>734</fpage><lpage>734</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мазаева О.А., Юрьев А.А., Бабичева В.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Мазаева О.А., Юрьев А.А., Бабичева В.А.</copyright-holder><copyright-holder xml:lang="en">Mazaeva O.A., Yuriev A.A., Babicheva V.A.</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://www.gt-crust.ru/jour/article/view/1764">https://www.gt-crust.ru/jour/article/view/1764</self-uri><abstract><p>Оценка темпов и понимание контролирующих факторов современной динамики развития экзогенных геологических процессов являются актуальной задачей во многих регионах мира. Один из методов получения данных для ее решения – мониторинг. В работе представлены результаты мониторинговых исследований краткосрочной динамики комплекса экзогенных геологических процессов по данным БПЛА аэрофотосъемки, выполненной на пяти ключевых участках в береговой зоне юга Братского водохранилища. Исследуемая территория относится к платформенной структуре юга Иркутского амфитеатра, которая считается относительно стабильной в геодинамическом отношении. Отработана методическая схема получения рядов данных по динамике комплекса экзогенных геологических процессов в береговой геосистеме. Высота полета 50–60 м является оптимальной для получения ортофотопланов с разрешением 1.1–2.2 см/пк, достаточным для оценки площадной динамики процессов, и цифровых моделей рельефа с разрешением 2.6–5.4 см/пк – для оценки объемной динамики.</p><p>Установлено, что площадь абразионного размыва на участке Рассвет составила 6900 м2, что соответствует средней ширине размыва 3.45 м на погонный метр длины берега с максимальными значениями до 6.51 м. Высокие темпы абразии за период 2021–2022 гг. связаны с максимальным уровнем воды в Братском водохранилище, близким к нормальному подпорному горизонту. Оценка объемной динамики береговых оврагов показала отрицательные значения, так как устьевые части большинства оврагов были размыты абразией. На других участках вторичные донные (Мамонтов, Бараний) и береговые (Хадахан) овраги характеризуются положительной динамикой как в площадном, так и в объемном приросте (12–20 м2 и 1.3–35.0 м3 соответственно). На участке Хадахан объемный прирост новых и наблюдаемых ранее суффозионно-просадочных воронок составил 0.45 м3.</p><p>Полученные площадные и объемные скорости развития процессов могут служить основой для их современной оценки и прогноза развития с целью предотвращения и снижения социально-экономических рисков.</p></abstract><trans-abstract xml:lang="en"><p>Estimating the dynamics of exogenous geological processes and understanding their controlling factors is an urgent task faced by many regions of the world. One of the methods of its solution is monitoring. The paper presents the UAV monitoring results for short-term dynamics of complex exogenous processes at five key sites in the coastal zone south of the Bratsk reservoir. The study area is a part of the platform structure in the south of the Irkutsk amphitheater, which is considered to be relatively stable in terms of geodynamics. There has been developed a methodical scheme for obtaining data series on the dynamics of complex exogenous geological processes in the coastal geosystem. A flight altitude of 50–60 m is optimal to obtain orthophotos with a resolution of 1.1–2.2 cm/px, sufficient to estimate the areal dynamics of the processes, and a DEM with a resolution of 2.6–5.4 cm/px to estimate the volumetric dynamics.</p><p>The eroded coastal area at the Rassvet site was measured to be 6900 m2, which corresponds to an average erosion width of 3.45 m per linear meter of coastal length with maximum values of up to 6.51 m. A high rate of coastal erosion in the period 2021–2022 is related to the maximum water level in the Bratsk reservoir, close to the normal headwater level. The assessment of the volumetric dynamics of the coastal gullies yielded negative values, as most of the gully mouths were eroded. The secondary valley-bottom gullies (Mamontov and Barany sites) and coastal gullies (Khadakhan site) are characterized by positive dynamics both in area and volume growth (12–20 m2 and 1.3–35.0 m3, respectively). At the Khadakhan site, the volumetric growth of new and previously observed suffusion sinkholes was 0.45 m3.</p><p>The obtained areal and volumetric rates of the exogenous processes can serve as a basis for their modern assessment and prediction of their development in order to prevent and reduce socio-economic risks.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>экзогеодинамика</kwd><kwd>Братское водохранилище</kwd><kwd>абразия</kwd><kwd>овражная эрозия</kwd><kwd>площадная и объемная динамика процессов</kwd></kwd-group><kwd-group xml:lang="en"><kwd>exogeodynamics</kwd><kwd>Bratsk reservoir</kwd><kwd>coastal erosion</kwd><kwd>gully erosion</kwd><kwd>areal and volumetric dynamics of processes</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках базового бюджетного проекта Министерства науки и высшего образования РФ № FWEF-2021-0009 «Современная геодинамика, механизмы деструкции литосферы и опасные геологические процессы в Центральной Азии» с использованием оборудования ЦКП «Геодинамика и геохронология» Института земной коры СО РАН (грант №075-15-2021-682)</funding-statement><funding-statement xml:lang="en">The work was executed as part of the base budget proposal of the Ministry of Science and Higher Education of the RF № FWEF-2021-0009 "Modern geodynamics, destruction mechanisms of the lithosphere, and hazardous geological processes in Central Asia" with the use of the Centre for Geodynamics and Geochronology at the Institute of the Earth’s Crust SB RAS (grant № 075-15-2021-682)</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">Agisoft Metashape Professional Edition, 2022. 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