Some youtuber tried to sonar it to get the depth and also tried throwing some video camera in it but it's muddy and turbulent so it's hard to get the big pictur

Some youtuber tried to sonar it to get the depth and also tried throwing some video camera in it but it's muddy and turbulent so it's hard to get the big picture of how it works. What would really be cool would be to have the 3d geometry of the river, and run it through water simulation software ; put a rag-doll in and see how the current would pull you down. Constructing the 3d geometry is probably an interesting engineering challenge. Although there exists some off the shelf underwater lidar solutions https://www.youtube.com/watch?v=YevvMcc6Zu4 https://www.youtube.com/watch?v=YevvMcc6Zu4 and underwater drones, it's likely to be too turbulent (and with air bubble) for them to stay in place at a known position to work properly out of the box (but maybe not because it seems to be possible to scuba dive the strid https://www.youtube.com/watch?v=kUamSryCUK4 https://www.youtube.com/watch?v=kUamSryCUK4).