River Severn

The River Severn is the longest river in Great Britain, at about 354 kilometres (220 mi), It rises in the Cambrian Mountains of mid Wales. It then flows through Shropshire, Worcestershire and Gloucestershire, with the county towns of Shrewsbury, Worcester, and Gloucester on its banks.The Severn is the greatest river in terms of water flow in England and Wales.

River Severn
Welsh: Afon Hafren
River
The Severn at Shrewsbury from Shrewsbury Castle.
Countries	United Kingdom, (Wales, England)
Regions	Mid Wales, West Midlands, South West
Administrative areas	Powys, Shropshire, Worcestershire, Gloucestershire
Tributaries
- left	Vyrnwy, Tern, Stour, Warwickshire Avon, Bristol Avon
- right	Teme, Leadon, Wye
Cities	Shrewsbury, Worcester, Gloucester, Bristol
Landmarks	Ironbridge Gorge, Severn Valley, Severn Bore, Severn crossing
Source
- location	Plynlimon, Ceredigion, Wales
- elevation	610 m (2,001 ft)
- coordinates	52.493465°N 3.734578°W / 52.493465; -3.734578
Mouth	Severn Estuary
- location	Bristol Channel, United Kingdom
- elevation	0 m (0 ft)
Length	354 km (220 mi)
Basin	11,420 km² (4,409 sq mi)
Discharge	for Bewdley, Worcs. SO 7815 7622
- average	61.17 m³/s (2,160 cu ft/s)
- max	533.48 m³/s (18,840 cu ft/s) max recorded on 1947-03-21
Tributaries (light blue) and major settlements on and near the Severn (bold blue)

The river is usually considered to become the Severn Estuary after the Second Severn Crossing. The river then discharges into the Bristol Channel which in turn discharges into the Atlantic Ocean. The Severn's drainage basin area is 11,420 square kilometres (4,409 sq mi), excluding the River Wye and the River Avon which flow into the Severn Estuary.