Retrieval of siltation 3D properties in artificially created water conveyance tunnels using image-based 3D reconstruction

• Published in: Measurement : journal of the International Measurement Confederation 2023-04, Vol.211, p.112586, Article 112586
• Main Authors: Wu, Xinbin, Wang, Jisong, Li, Junjie, Zhang, Xuewu
• Format: Article
• Language: English
• Subjects: 3D reconstruction; Metrology; Siltation; Water conveyance tunnel
• ISSN: 0263-2241; 1873-412X
• DOI: 10.1016/j.measurement.2023.112586

•Artificially created water conveyance tunnel underwater siltation reconstruction.•Underwater 3D measurement framework for siltation thickness and area measurement.•Accurate and low-cost measurement method based on image 3D reconstruction. Previous studies on tunnel damage measurement methods mainly focused on cracks and leaks, but there was little research on siltation at the bottom of water conveyance tunnels. To this end, this paper proposes a 3D measurement framework of siltation based on image 3D reconstruction technology to achieve intuitive understanding and accurate measurement of underwater siltation. The method uses structure from motion (SfM) algorithm and multi-view stereo (MVS) algorithm to generate 3D point clouds of siltation, followed by denoising, scale blur removal and coordinate transformation to obtain 3D information of siltation. Experiments are conducted for three types of siltation using the proposed measurement process in an artificially created water conveyance tunnel environment. The experimental results show that the proposed method not only reproduces the siltation pattern, but also provides accurate measurement of siltation thickness and area, which provides a new reference for the inspection and maintenance of water conveyance tunnels.