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Article

Modeling the Relationships between the Height and Spectrum of Submerged Tufa Barrage Using UAV-Derived Geometric Bathymetry and Digital Orthoimages

by 1,2, 1,2,* and 1,2
1
Chongqing Jinfo Mountain Karst Ecosystem National Observation and Research Station, School of Geographical Sciences, Southwest University, Chongqing 400715, China
2
Chongqing Engineering Research Center for Remote Sensing Big Data Application, School of Geographical Sciences, Southwest University, Chongqing 400715, China
*
Author to whom correspondence should be addressed.
Academic Editor: Biswajeet Pradhan
Sensors 2021, 21(21), 6987; https://doi.org/10.3390/s21216987
Received: 12 September 2021 / Revised: 7 October 2021 / Accepted: 18 October 2021 / Published: 21 October 2021
(This article belongs to the Section Physical Sensors)
Tufa barrages play an important role in fluviatile tufa ecosystems and sedimentary records. Quantifying the height of tufa barrage is significant for understanding the evolution and development of the Holocene tufa barrage systems. However, for submerged tufa barrages, there is no low-cost non-contact method to retrieve barrage height. Generally, it is difficult to recognize small tufa barrages by means of remotely sensed satellite data, but the combination of unmanned aerial vehicles (UAV) and Structure-from-Motion (SfM) photogrammetry makes it possible. In this study, we used a fixed-wing UAV and a consumer-grade camera to acquire images of the submerged tufa barrage in Lying Dragon Lake, Jiuzhaigou National Nature Reserve, China, and estimated the height of the tufa barrage through UAV-based photogrammetric bathymetry. On this foundation, the relationship between barrage height and its spectrum was established through band ratio analysis using UAV-derived geometric bathymetry and digital orthoimages, which provided an alternative strategy to characterize the height of submerged tufa barrages. However, the spectral characteristics of submerged tufa barrages will oscillate with changes in the environmental conditions. In future research, we will consider using a dedicated aquatic multispectral camera to improve the experimentation. View Full-Text
Keywords: submerged tufa barrage; unmanned aerial vehicle (UAV); point cloud; remote sensing; spectral analysis submerged tufa barrage; unmanned aerial vehicle (UAV); point cloud; remote sensing; spectral analysis
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MDPI and ACS Style

He, J.; Lin, J.; Xu, Y. Modeling the Relationships between the Height and Spectrum of Submerged Tufa Barrage Using UAV-Derived Geometric Bathymetry and Digital Orthoimages. Sensors 2021, 21, 6987. https://doi.org/10.3390/s21216987

AMA Style

He J, Lin J, Xu Y. Modeling the Relationships between the Height and Spectrum of Submerged Tufa Barrage Using UAV-Derived Geometric Bathymetry and Digital Orthoimages. Sensors. 2021; 21(21):6987. https://doi.org/10.3390/s21216987

Chicago/Turabian Style

He, Jinchen, Jiayuan Lin, and Yanhao Xu. 2021. "Modeling the Relationships between the Height and Spectrum of Submerged Tufa Barrage Using UAV-Derived Geometric Bathymetry and Digital Orthoimages" Sensors 21, no. 21: 6987. https://doi.org/10.3390/s21216987

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