Catchment description
From the northern suburbs to the Thames at Brentford, the River Brent drains a mix of dense streets, parkland, reservoirs and open green space.
Key facts about the catchment
- The River Brent is a tributary of the River Thames, joining it at Brentford.
- Major tributaries include the Dollis Brook, Silk Stream, Mutton Brook and Edgware Brook.
- The catchment crosses several London boroughs, including Barnet, Brent, Harrow and Ealing.
- Much of the land is urban, with green corridors that carry floodwater and support wildlife.
A river shaped by people
Mills, culverts and road crossings have changed the course of the river over the centuries. Many stretches now run through engineered channels, while others have been restored to a more natural form.
Three reaches, three pressures
Headwaters and suburban streams
Small streams collect surface runoff from housing and roads, so pollution and sudden high flows are the main concerns.
Parkland and open channels
Parks and green corridors hold water and offer habitat, but litter and bank erosion need regular attention.
Approach to the Thames
Lower sections are wider and tidal influence is felt, so flood management and fish passage are key issues.
Landscape and land use
Roofs, roads and paved gardens send rainwater straight into drains. Reducing this runoff is one of the partnership's most practical goals.
Flood storage in parks and reservoirs slows peak flows. Planners look for places where the river can spread safely during heavy rain.
Kingfishers, otters and a wide range of insects use the river corridor. Healthy banks and clean gravels are essential for them.
Why the lower river matters
Where the Brent meets the Thames, habitats change with the tide. These mudflats and reedbeds are a key stop for migrating birds.
Plan a visitCatchment boundaries are shown for planning purposes and may be refined as new survey data becomes available.