A tidal bore, often simply given as bore in context, is a tidal phenomenon in which the leading edge of the incoming tide forms a wave (or waves) of water that travels up a river or narrow bay against the direction of the river or bay's current.
Herein, which UK rivers have a bore?
Of the one hundred or so rivers around the world known to produce bores, around a fifth of these are in the United Kingdom. This is a consequence of high tidal ranges occurring in several locations around the British Isles – three rivers with notable bores are the Severn, Dee and Mersey.
Additionally, can you surf on a river?
River surfing is the sport of surfing either standing waves or tidal bores in rivers. It's related to ocean surfing but surfboards are usually thicker and wider, similar to fish surfboards. In contrast to ocean waves, the force of the river's current is used to keep afloat and ride the wave.
What causes the River Severn Bore?
The Severn bore is a tidal bore seen on the tidal reaches of the River Severn in south western England. It is formed when the rising tide moves into the funnel-shaped Bristol Channel and Severn Estuary and the surging water forces its way upstream in a series of waves, as far as Gloucester and beyond.
How many rivers have a bore?
In a few rivers however, the behaviour is remarkably different. The onset of the flood tide is marked by a distinct and sometimes very vigorous wave called a bore. Approximately 100 rivers around the world are known to produce bores, of which perhaps 20 or so are in the United Kingdom.