Wandle is a river in south-east England
. The names of the river and of Wandsworth are thought to have derived from the Old English "Wendlesworth" meaning "Wendle's Settlement". The river runs through southwest London
and is about 9 miles (14 km) long. It passes through the London Boroughs of Croydon
, Merton, and Wandsworth to join the River Thames on the Tideway at Wandsworth. Much of the River is accessible using the Wandle Trail.
Rain falls on the North Downs, filters through the chalk and emerges on the spring line. At the top of the catchment the river is mostly culverted. The river is first visible at Wandle Park in Croydon. The flow is augmented at the Wandle's two main sources, both at about 115 ft (38 yd, 35 m) above sea level. These are a pond in Waddon Ponds beside Mill Lane, Croydon; and a secondary source at Carshalton Ponds.Two seasonal streams, the Coulsdon
Bourne and the Caterham Bourne, run in wet winters.This improvement in water quality has also seen other fish thrive with stocks of Chub, Roach and Perch all flourishing once again with the most popular angling spots situated on the river at Colliers Wood.