River Thames
The principal river of southern England and the source of much of London’s water supply. Its recovery from being declared biologically dead in the 1950s is one of the best-documented river restorations anywhere.
Key facts
- Length
- 346 km
- Catchment area
- approximately 16,000 km²
- Mean flow at Kingston
- approximately 65 m³/s
- Population in catchment
- around 15 million
Why it matters
The Thames illustrates the central tension in UK water: a modest river by international standards supporting one of the densest populations in Europe. Abstraction for London, effluent return from the same population, and a chalk-dominated headwater geology combine to make it one of the most intensively managed rivers in the world. It was pronounced biologically dead along its tidal reaches in 1957; sustained investment in wastewater treatment restored fish populations, and the Thames Tideway Tunnel addresses the remaining combined sewer overflow discharges.
Relationships
- Located in: United Kingdom
Related intelligence
Sources
- World Wildlife Fund / McGill University — HydroSHEDS / HydroRIVERS / HydroLAKES / HydroBASINS. Open — attribution required · CC BY 4.0
- Global Water System Project — Global Reservoir and Dam Database. Open — attribution required · CC BY 4.0
- Peer-reviewed scientific literature — Open-access hydrology, water chemistry and water use research. Public but restricted · Publisher terms — public access, reuse not clearly granted