The Pymmes Brook catchment covers a total area of 4,230 hectares with an urban
extent of 44%. It rises just outside Enfield in Barnet and runs for almost 20 kilometres
before joining the Lee Navigation at Tottenham. The geology of the catchment is
impermeable London Clay with some alluvial deposits. The river is heavily
engineered with 2 kilometres of culvert and over 6 kilometres of concrete lined
channels. These factors combine to create a relatively flashy river system that has a
low baseflow component and responds quickly to rainfall events.

The Salmons Brook catchment is similar in area, 4,170 hectares, and geology type to

Pymmes Brook. However the extent of urbanisation is slightly less at 35% and the

upstream sections are more naturalised, though the river does pass through a series of

culverts before reaching its confluence with Pymmes Brook within the Meridian

Water site. In addition, Salmons Brook is fed by several tributaries such as Saddlers

Mill Stream, Houndsden Gutter and Brimsdown Ditch that drain urban areas and are

largely culverted or channelised. Consequently Salmons Brook has similar flow

characteristics to Pymmes Brook, the main difference being that Salmons Brook

derives much of its dry weather flow from the treated effluent discharged by

Deephams Sewage Treatment Works at Picketts Lock.

Pymmes Brook at Edmonton, Silver Street

https://flood-warning-information.service.gov.uk/station/7372?direction=u

Height01.80.056

Current River Level: 0.056m, steady

Within the usual range for this location

Current level recorded at 2:15am, Friday 7th May BST
(1:15am, Friday 7th May GMT)

Change from previous measurement: 0.000m
(recorded at 2:00am, Friday 7th May BST)

The usual range of the Pymmes Brook at Edmonton, Silver Street is between 0.04m and 1.70m. It has been between these levels for 90% of the time since monitoring began.

The typical recent level of the Pymmes Brook at Edmonton, Silver Street over the past 12 months has been between 0.04m and 0.12m. It has been between these levels for at least 150 days in the past year.

The highest level ever recorded at the Pymmes Brook at Edmonton, Silver Street is 1.45m, reached on Tuesday 12th October 1993 at 10:00pm.

Note that this data may not take account of recent measurements, as we wait until a level has been verified by the Environment Agency before adding it to our records.

Monitoring Station: Edmonton, Silver Street
Watercourse: Pymmes Brook
Nearest Town/Village: Edmonton
Local Authority: Enfield
Ceremonial County: Greater London

Environment Agency Location ID: 5369TH
Environment Agency Gauge ID: 5369TH-level-stage-i-15_min-mASD
Operational Area: Lower Lee Rivers and Lakes
Catchment Area: London
UK Hydrometric Area: Lee
Environment Agency Region: Thames
Datum Type: Above Stage Datum (ASD)
Stage Datum: 11.13m AOD

Nearby Monitoring Locations

Other monitoring locations on the Pymmes Brook

Pymmes Brook Map

Monitoring locations on nearby rivers