Monitoring Change and Recovery of an Embayed Beach in Response to Typhoon Storms Using UAV LiDAR

被引:3
作者
Lei, Qiujia [1 ]
Wang, Xinkai [1 ,2 ]
Liu, Yifei [1 ,2 ]
Guo, Junli [1 ,2 ]
Cai, Tinglu [1 ,2 ]
Xia, Xiaoming [1 ,2 ]
机构
[1] Minist Nat Resources, Inst Oceanog 2, Hangzhou 310012, Peoples R China
[2] Minist Nat Resources China, Key Lab Ocean Space Resource Management Technol, Hangzhou 310012, Peoples R China
关键词
embayed beach; topographical changes; UAV LiDAR; DEM of difference (Dod); typhoon storms; COASTAL CHANGE; RTK-GPS; EROSION; MANAGEMENT; EVOLUTION; PROFILES; IMAGERY; IMPACT; CLIFFS; MODEL;
D O I
10.3390/drones8050172
中图分类号
TP7 [遥感技术];
学科分类号
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要
The monitoring of beach topographical changes and recovery processes under typhoon storm influence has primarily relied on traditional techniques that lack high spatial resolution. Therefore, we used an unmanned aerial vehicle light detection and ranging (UAV LiDAR) system to obtain the four time periods of topographic data from Tantou Beach, a sandy beach in Xiangshan County, Zhejiang Province, China, to explore beach topography and geomorphology in response to typhoon events. The UAV LiDAR data in four survey periods showed an overall vertical accuracy of approximately 5 cm. Based on the evaluated four time periods of the UAV LiDAR data, we created four corresponding DEMs for the beach. We calculated the DEM of difference (Dod), which showed that the erosion and siltation on Tantou Beach over different temporal scales had a significant alongshore zonal feature with a broad change range. The tidal level significantly impacted beach erosion and siltation changes. However, the storm surge did not affect the beach area above the spring high-tide level. After storms, siltation occurred above the spring high-tide zone. This study reveals the advantage of UAV LiDAR in monitoring beach changes and provides novel insights into the impacts of typhoon storms on coastal topographic and geomorphological change and recovery processes.
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页数:26
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