River Severn

River Severn Welsh: Afon Hafren
The river seen from Shrewsbury Castle
Tributaries (light blue) and major settlements on and near the Severn (bold blue)
Location
Country	England and Wales
Region	Mid Wales, West Midlands, South West
Counties	Powys, Shropshire, Worcestershire, Gloucestershire
Cities	Shrewsbury, Worcester, Gloucester, Bristol
Physical characteristics
Source
- location	Plynlimon, Powys, Wales
- coordinates	52°29′36″N 3°44′05″W / 52.493464°N 3.734597°W / 52.493464; -3.734597
- elevation	610 m (2,000 ft)
Mouth	Severn Estuary
- location	Bristol Channel, United Kingdom
- elevation	0 m (0 ft)
Length	354 km (220 mi)
Basin size	11,420 km2 (4,410 sq mi)
Discharge
- location	Bewdley, Worcs. SO 7815 7622[1]
- average	61.17 m3/s (2,160 cu ft/s)[1]
- maximum	533.48 m3/s (18,840 cu ft/s)max recorded on 1947-03-21[2]
Discharge
- location	Apperley, Glos.
- average	107 m3/s (3,800 cu ft/s)
Discharge
- location	Montford, Shrops.[3]
- average	43.46 m3/s (1,535 cu ft/s)
Basin features
Tributaries
- left	Vyrnwy, Tern, Stour, Warwickshire Avon, Bristol Avon
- right	Teme, Leadon, Wye

The River Severn (Welsh: Afon Hafren, Latin: Sabrina) is the longest river in Great Britain. It is about 354 kilometres (220 miles) long.^[4][5] It starts in the Cambrian Mountains of centre Wales. It then flows through Shropshire, Worcestershire and Gloucestershire. The county towns of Shrewsbury, Worcester, and Gloucester are on its banks. The Severn is the greatest river in terms of water flow in England and Wales.

The river is usually considered to become the Severn Estuary after the Second Severn Crossing. The river then discharges into the Bristol Channel, which discharges into the Atlantic Ocean. The Severn's drainage basin area is 0 k^{[convert: unknown unit]}, excluding the River Wye and the Bristol Avon which flow into the Severn Estuary.

Media related to River Severn at Wikimedia Commons