This image shows the Trent Aegir at Owston Ferry. It is a tidal bore which occurs on the River Trent at certain times of the year. It occurs when a high spring tide meets the downstream flow of the river. The shape of the river exaggerates this effect causing a large wave to travel upstream. It can sometimes travel as far as Gainsborough but after this the shape of the river causes it to reduce to little more than a ripple. It is unknown whether it takes its name from the personification of the sea in Norse mythology or if it is from Old English meaning flood, stream, and water.
Image courtesy of the North Lincolnshire Museum Image Archive.
