River Severn

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The River Severn

A Key Stage 2 Resource for Rivers and Coasts

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The Severn Bore

What is the Seven Bore?

The Sevrn bore is a huge wave which sweeps upstream when tides are high.

Why does it occur?

The tidal range of up to 15m (50ft) in the Severn estuary is the second largest in the world. The waters of the rising tide are forced rapidly from a wide estuary into the narrow river channel below Gloucester. This funneling effect causes a spectacular metre-high wave, known as the 'Severn bore', to travel upstream at speeds of up to 32 km/hour (20 miles/hour).

How high can the Severn Bore reach?

The Severn bore can reach heights of 10ft in midstream and up to 820ft wide in sandy estuary channels.

How fast does the Severn Bore travel?

At its fastest the bore can move at 13mph.

How long is does the Severn Bore travel?

The bore travels 21 miles from Awre to Maisemore Weir.

How many bores take place on the Severn each year?

There are about 260 bores on the Severn each year, usually two a day on about 130 days a year, around the vernal and autumnal equinoxes (February to April and August to October).

A timetable can be found at www.severn-bore.co.uk.

Where is the best place to see the Severn bore?

Many people watch the bore at Overton near Fretherne and Maisemore near Gloucester.

Favourite places for the locals are Stonebench on the east side of the river and Minsterworth on the west bank


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