Shallow Water Measurements Using a Single Green Laser Corrected by Building a Near Water Surface Penetration ModelReportar como inadecuado


Shallow Water Measurements Using a Single Green Laser Corrected by Building a Near Water Surface Penetration Model


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1

School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China

2

Institute of Marine Science and Technology, Wuhan University, Wuhan 430079, China

3

Automation Department, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China

4

The Survey Bureau of Hydrology and Water Resources of Yangtze Estuary, Shanghai 200136, China





*

Author to whom correspondence should be addressed.



Academic Editors: Deepak R. Mishra and Prasad S. Thenkabail

Abstract To reduce the size and cost of an integrated infrared IR and green airborne LiDAR bathymetry ALB system, and improve the accuracy of the green ALB system, this study proposes a method to accurately determine water surface and water bottom heights using a single green laser corrected by the near water surface penetration NWSP model. The factors that influence the NWSP of green laser are likewise analyzed. In addition, an NWSP modeling method is proposed to determine the relationship between NWSP and the suspended sediment concentration SSC of the surface layer, scanning angle of a laser beam and sensor height. The water surface and water bottom height models are deduced by considering NWSP and using only green laser based on the measurement principle of the IR laser and green laser, as well as employing the relationship between NWSP and the time delay of the surface return of the green laser. Lastly, these methods and models are applied to a practical ALB measurement. Standard deviations of 3.0, 5.3, and 1.3 cm are obtained by the NWSP, water-surface height, and water-bottom height models, respectively. Several beneficial conclusions and recommendations are drawn through the experiments and discussions. View Full-Text

Keywords: airborne LiDAR bathymetry; near water surface penetration; water surface height; water bottom height; suspended sediment concentration of the surface layer airborne LiDAR bathymetry; near water surface penetration; water surface height; water bottom height; suspended sediment concentration of the surface layer





Autor: Jianhu Zhao 1,2, Xinglei Zhao 1,2,* , Hongmei Zhang 3 and Fengnian Zhou 4

Fuente: http://mdpi.com/



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