Use of UAV Photogrammetry for Monitoring Topographic Changes in the Tottori Sand Dunes, Japan
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- Liu Jiaqi
- Tottori University
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- Kimura Reiji
- Tottori University
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- Wu Jing
- Tottori University
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- Kawai Takayuki
- Tottori University
Bibliographic Information
- Other Title
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- UAV 写真測量による鳥取砂丘の地形変化モニタリング
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Abstract
The Tottori Sand Dunes, the largest area of natural sand dunes in Japan, is an important tourist attraction in the San’in Kaigan Geopark in western Japan. A sand fence has been emplaced to prevent blowing dune sand from damaging the environment and interfering with human activities; however, there has been no quantitative evaluation of its effectiveness. We collected imagery of the area around the sand fence from March to May 2021 with an unmanned aerial vehicle (UAV) and used the data to construct and analyze a time series of three-dimensional models via structure from motion (SfM) and multi view stereo (MVS) and geographic information system (GIS) techniques. We found that imagery collected on cloudy days and days when the sand surface had higher soil moisture yielded terrain models with superior accuracy. Moreover, after rectifying the UAV images using ground control points (GCP) and a total station, horizontal and vertical root mean squared errors were greatly improved to 0.018 ± 0.005 and 0.018 ± 0.007 m, respectively. We evaluated topographic and volumetric changes due to sand movement to and from the areas of sand fences by comparing successive elevation profiles of three cross sections of the study area. The results show that UAV photogrammetry can be used to accurately monitor topographic changes and sand movements and provide a basis for planning mitigation measures such as wind-blown sand prevention.
Journal
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- SAND DUNE RESEARCH
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SAND DUNE RESEARCH 69 (1), 1-9, 2022
Japanese Society of Sand Dune Research
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Keywords
Details 詳細情報について
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- CRID
- 1390295491692104704
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- NII Book ID
- AN10412431
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- ISSN
- 24349291
- 09185623
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- NDL BIB ID
- 032332073
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- KAKEN
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- Abstract License Flag
- Disallowed