Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 52198 10.2205/2023ES000854 HRQVQK ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Comparative Analysis of the Unmanned Aerial Vehicles and Terrestrial Laser Scanning Application for Coastal Zone Monitoring Comparative Analysis of the Unmanned Aerial Vehicles and Terrestrial Laser Scanning Application for Coastal Zone Monitoring https://orcid.org/0000-0002-1710-3757 Данченков Александр Романович Danchenkov Aleksandr Romanovich aldanchenkov@mail.ru

кандидат географических наук;

candidate of geographical sciences;

 https://orcid.org/0000-0003-2350-3690 Белов Николай Сергеевич Belov Nikolay Sergeevich Институт океанологии имени П. П. Ширшова Moscow Россия Institute of Oceanology. PP Shirshov Russian Academy of Sciences Moscow Russian Federation Балтийский федеральный университет имени Иммануила Канта Kaliningrad Россия Immanuel Kant Russian State University Kaliningrad Russian Federation 10 12 2023 10 12 2023 23 4 1 15 17 10 2023 26 05 2023 https://rjes.ru/en/nauka/article/52198/view

The shallow sandy shores of the tideless sea are regularly affected by storm activity. Foredune ridge is a natural and anthropogenic object, a natural protective barrier that protects ecosystems and populated areas from the effects of dangerous hydrometeorological phenomena such as storm surges and wind-sand flux. In the course of impact of dangerous hydrometeorological phenomena, the foredune ridge integrity is disturbed, the composing material is washed away thus forming breakthroughs. Monitoring of the foredune state is an important stage in maintaining its condition and also provides an empirical basis for predicting the impact of hazardous events. The use of ground-based laser scanning technology as well as digital photogrammetry for the study of sensitive coastal zones is justified for these purposes. In this article, we compare the results of calculating the dynamics of the beach sand material and advance them according to the results of ground-based laser scanning and digital photogrammetry. Comparability is provided by high-density clouds of ground-scan points and digital photogrammetry in a single coordinate reference. Two sections of the sensitive coastal zone of the Curonian Spit (Russian sector of the South-Eastern Baltic) have been explored in advance. A comparison of the applicability of means for obtaining digital elevation models to evaluate the dynamics of sand material has been made. In comparison with TLS, the use of UAV with the SfM algorithm is limited to post-storm surveys, since the final accuracy does not provide for reliable lithodynamic studies due to the small scale of processes comparable to measurement errors.

The shallow sandy shores of the tideless sea are regularly affected by storm activity. Foredune ridge is a natural and anthropogenic object, a natural protective barrier that protects ecosystems and populated areas from the effects of dangerous hydrometeorological phenomena such as storm surges and wind-sand flux. In the course of impact of dangerous hydrometeorological phenomena, the foredune ridge integrity is disturbed, the composing material is washed away thus forming breakthroughs. Monitoring of the foredune state is an important stage in maintaining its condition and also provides an empirical basis for predicting the impact of hazardous events. The use of ground-based laser scanning technology as well as digital photogrammetry for the study of sensitive coastal zones is justified for these purposes. In this article, we compare the results of calculating the dynamics of the beach sand material and advance them according to the results of ground-based laser scanning and digital photogrammetry. Comparability is provided by high-density clouds of ground-scan points and digital photogrammetry in a single coordinate reference. Two sections of the sensitive coastal zone of the Curonian Spit (Russian sector of the South-Eastern Baltic) have been explored in advance. A comparison of the applicability of means for obtaining digital elevation models to evaluate the dynamics of sand material has been made. In comparison with TLS, the use of UAV with the SfM algorithm is limited to post-storm surveys, since the final accuracy does not provide for reliable lithodynamic studies due to the small scale of processes comparable to measurement errors.

 coast monitoring UAV TLS DGPS photogrammetry DEM/DTM coast monitoring UAV TLS DGPS photogrammetry DEM/DTM The study was done with a~support of the state assignment of IO RAS (Theme FMWE-2021-0012) The study was done with a support of the state assignment of IO RAS (Theme No. FMWE-2021-0012)

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