|⁃ location||South Gloucestershire, West of England, England|
|⁃ elevation||263 ft (80 m)|
|Bristol, West of England, England|
|195 ft (59 m)|
|Length||2 mi (3.2 km)|
|River system||Bristol Avon|
The Hazel Brook, also known as the Hen, is a tributary of the River Trym in Bristol, England. It rises at Cribbs Causeway in South Gloucestershire. 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.
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 attenuation reservoir near Cribbs Causeway. Measurements of pollution by the city council show the water to be relatively clean.
- "The Big Blue Map of Bristol". Bristol City Council. Retrieved 29 August 2018.
- "The river Hen and Hazel Brook". The Name of the Green Dragon. Retrieved 29 August 2018.
- Plaster, Andrew. "Henbury". Bristol & Avon Family History Society. Retrieved 29 August 2018.
- "Visit to the South-West, Thursday 13th/Friday 14th January 2000". Parliament. Retrieved 29 August 2018.
"Waterways Monitoring: River Trym and Hazel Brook". Bristol City Council. Archived from the original on 20 May 2011. Retrieved 24 November 2009. Cite uses deprecated parameter
- "Rivers and Rhines". Bristol City Council. Retrieved 29 August 2018.
- "Trym - source to conf R Avon (Brist)". Environment Agency. Retrieved 29 August 2018.
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