The Hazel Brook, also known as the Hen, is a tributary of the

River Trym A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

Bristol Bristol () is a city, ceremonial county and unitary authority in England. Situated on the River Avon, it is bordered by the ceremonial counties of Gloucestershire to the north and Somerset to the south. Bristol is the most populous city in ...

England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe b ...

. It rises at Cribbs Causeway in

South Gloucestershire South Gloucestershire is a unitary authority area in the ceremonial county of Gloucestershire, South West England. Towns in the area include Yate, Chipping Sodbury, Thornbury, Filton, Patchway and Bradley Stoke, the latter three forming part ...

. From there, its course takes it south, passing the western end of Filton Aerodrome on its left bank, through

Brentry Brentry is a suburb of north Bristol, England, between Henbury and Southmead which is spread along the southern edge of the Filton to Avonmouth railway line. Description The boundaries of Brentry are not well defined. The settlement grew around ...

and

Henbury Henbury is a suburb of Bristol, England, approximately north west of the city centre. It was formerly a village in Gloucestershire and is now bordered by Westbury-on-Trym to the south; Brentry to the east and the Blaise Castle Estate, Blaise Ha ...

before dropping through a steep limestone gorge in the

Blaise Castle Blaise Castle is a folly built in 1766 near Henbury in Bristol, England. The castle sits within the Blaise Castle Estate, which also includes Blaise Castle House, a Grade II* listed 18th-century mansion house. The folly castle is also Grade I ...

estate. It continues south through two lakes before joining the Trym at

Coombe Dingle Coombe Dingle is a suburb of Bristol, England, centred near where the Hazel Brook tributary of the River Trym emerges from a limestone gorge bisecting the Blaise Castle Estate to join the main course of the Trym. Historically this area formed ...

Hydrology

Surface run-off in the upper catchment of the Hazel Brook, especially from the large retail centre at Cribbs Causeway, sends a good deal of silt into the system, slowing the flow and creating a risk of flooding downstream in the Trym. This problem has now been partially alleviated by the construction of the

Catbrain Catbrain Hill, simply known as Catbrain, is a small village in England north of the city of Bristol, within the county of South Gloucestershire. It is located near Cribbs Causeway, on a road that contains many car dealerships. A new housing es ...

attenuation reservoir near Cribbs Causeway. Measurements of pollution by the city council show the water to be relatively clean.

References

South Gloucestershire District Rivers of Gloucestershire Rivers of Bristol 2Hazel Henbury {{England-river-stub