// Workers AI · dad joke modeWhat did Stevenage Brook say to its friend? Brook-lieve me.
Stevenage Brook is a chalk stream and has a length of 7.544 km (4.688 mi) with a catchment area of 38.89 km2 (15.02 sq mi). Its headwaters is next to the A602 in Stevenage it is a tributary of the River Beane.
Course
[edit]Stevenage Brook rises next to the A602 road in Stevenage,[1] flowing through the Stevenage Golf Course, a tributary joins the Stevenage Brook, which is Aston End Brook,[2] and then it later joins the River Beane near Watton at Stone.[1] It has a total length of 7.544 km (4.688 mi) and a catchment area of 38.89 km2 (15.02 sq mi).[1] Stevenage Brook is one out of the twenty-three bodies in the Lee Upper Operational Catchment.[3]
Hydrology
[edit]The river level data of Stevenage Brook is listed on the table below.
| Measuring Station | Deepest Level Recorded | Date of Deepest Level | Normal Depth Range |
|---|---|---|---|
| Bragbury Park[4] | 1.19 m (119 cm) | 17 July 2025 | 0.05 m (5.0 cm) to 0.80 m (80 cm) |
The station at Bragbury Park is a flat V-weir at a width of 2.75 m (9 ft 0 in) and it was constructed in 1974.[5]
Water quality
[edit]The Environment Agency measures the water quality of the river systems in England. Each is given an overall ecological status, which may be one of five levels: high, good, moderate, poor and bad. There are several components that are used to determine this, including biological status, which looks at the quantity and varieties of invertebrates, angiosperms and fish.[6]
The water quality of the Stevenage Brook system was as follows in 2022.
| Water body | Water body type | Ecological Status | Biological quality elements | Catchment Area | Length | Hydromorphological Designation |
|---|---|---|---|---|---|---|
| Stevenage Brook[1] | River | Poor | Poor | 38.89 km2 (15.02 sq mi) | 7.544 km (4.688 mi) | Not designated as artificial or heavily modified. |
Ecology
[edit]Stevenage Brook is a chalk stream and contains habitats such as a marsh, which is present in Stevenage Brook Marsh and it is managed by the Environment Agency. Wet grassland and a developing swamp is present in the Stevenage Brook Marsh.[7]
In 2022, the Environment Agency gave data to the Stevenage Brook designating the water body with a ‘poor’ ecological status and ‘poor’ biological quality elements.[1]
Several invasive species on the brook include: Giant Hogweed, Himalayan balsam and Canadian goldenrod they are present on the Stevenage Brook.[7]
References
[edit]- 1 2 3 4 5 "Stevenage Brook | Catchment Data Explorer | Catchment Data Explorer". environment.data.gov.uk. Retrieved 2026-08-03.
- ↑ "Detailed maps & routes to explore across the UK | OS Maps". explore.osmaps.com. Retrieved 2026-08-03.
- ↑ "Lee Upper Operational Catchment | Catchment Data Explorer". environment.data.gov.uk. Retrieved 2026-08-03.
- ↑ "Stevenage Brook level at Bragbury Park - GOV.UK". check-for-flooding.service.gov.uk. Retrieved 2026-08-03.
- ↑ "Station | National River Flow Archive". nrfa.ceh.ac.uk. Retrieved 2026-08-03.
- ↑ "Glossary (see Biological quality element and Ecological status)". Catchment Data Explorer. Environment Agency. Retrieved 3 August 2026.
- 1 2 "STEVENAGE BIODIVERSITY ACTION PLAN: A Wilder Stevenage 2024-2028" (PDF). stevenage.gov.uk. Stevenage Borough Council.