Norbury Brook

Norbury Brook is a tributary of the River Wandle that rises near Lower Addiscombe Road and flows north-west through Selhurst, Thornton Heath and Norbury to join the Wandle at south Wimbledon.

A short stretch of this is visible in South Norwood at Heavers' Meadow, near Selhurst railway station, where the brook can be seen in a concrete channel next to the British Rail works as it runs north west along the bottom of the site before disappearing beneath Selhurst Road. It is fenced off here because it can be very dangerous, especially after a rain storm, where the water level can rise several feet in a few minutes as the water rapidly drains from the roads and hard surfaces around and into the surface water drain.

Wikipedia