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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2021, Vol. 18, No. 2, pp. 115-127

Assessment of terrain changes in the coastal zone using airborne laser scanning and unmanned aerial vehicle survey data (case study of the Anapa bay-bar)

M.D. Drugov 1 , O.V. Tutubalina 1 , V.V. Krylenko 2 
1 Lomonosov Moscow State University, Moscow, Russia
2 Shirshov Institute of Oceanology RAS, Moscow, Russia
Accepted: 26.01.2021
DOI: 10.21046/2070-7401-2021-18-2-115-127
We have assessed terrain changes for a section of the Anapa Bay using airborne laser scanning data (2013, 2015) and surveys from an unmanned aerial vehicle (2019). We present an automated method to identify the frontal dune (FD) crest and lower boundaries of the FD slopes using point clouds of digital elevation models and a system of transverse profiles. Analysis of the compiled maps shows that the areas where the FD is divided into fragments are characterized by the leveling of its front and the accumulation of material along the passages crossing the dune. Results of our quantitative assessment indicate that the balance of the transferred material for the “beach-FD” system in the study area in 2013–2015 amounted to 94.35 m3, and in 2015–2019 to –5113.78 m3. In the beach area, the removal of sand prevailed over both periods, while on the leeward slope of the FD accumulation prevailed significantly in volume over denudation. On the windward slope of the FD denudation prevailed in 2013–2015, and accumulation prevailed in 2015–2019. However, the balance in both cases is much less than on the beach and leeward slope.
Keywords: terrain changes, coastal zone, laser scanning, unmanned aerial vehicle, digital elevation model
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