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

Bristol Bristol () is a City status in the United Kingdom, cathedral city, unitary authority area and ceremonial county in South West England, the most populous city in the region. Built around the River Avon, Bristol, River Avon, it is bordered by t ...

England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...

. It rises at

Cribbs Causeway Cribbs Causeway is both a road in South Gloucestershire, England, running north of the city of Bristol, and the adjacent area which is notable for its Out-of-town shopping centres in the United Kingdom, out-of-town shopping and leisure facilitie ...

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, Kingswood, Thornbury, Filton, Patchway and Bradley Stoke. The southern p ...

. From there, its course takes it south, passing the western end of Filton Aerodrome on its left bank, through Brentry and Henbury before dropping through a steep limestone gorge in the Blaise Castle estate. It continues south through two lakes before joining the Trym at Coombe Dingle.

Hydrology

Surface run-off in the upper catchment of the Hazel Brook, especially from the large retail centre at

, 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 South Gloucestershire, England, part of the suburban North Fringe of Bristol. It is located near Cribbs Causeway, on a road that contains many car dealerships. A new housing esta ...

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