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Monitoring on Suspended Sediments During the Construction Period of Reclamation Projects Based on UAV
Pages: 34-38
Year: Issue:  3
Journal: Journal of Ocean Technology

Keyword:  unmanned aerial vehicle(UAV)multispectralsuspended sedimentsreclamation;
Abstract: In order to track and monitor the diffusion of suspended sediments in the construction period of reclamation projects in a real-time manner, this study attempts to use unmanned aerial vehicles(UAVs) with visible light and multi-spectral sensors to detect the cofferdam area of the Gulei Reclamation Project by remote sensing. The Pix4 d software is used to process visible light and multispectral photographs carried by UAVs. The results show that both images can recognize the suspended sediment distribution in the water body. By studying and analyzing the spectral characteristics of the sensor, it is found that the near-infrared band is sensitive to the increase of suspended sediment content. The calculation results using the band ratio formula show that the suspended sediment concentration of the water in the cofferdam decreases significantly after being discharged into the sea area, and continues to diffuse southward for 300 m. This method can overcome the low spatial and temporal resolution of remote sensing satellite images, and provide a new technical means for tracking and monitoring the environmental impact of marine projects.
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