Stevenage Brook is a chalk stream and has a length of with a catchment area of . Its headwaters is next to the A602 in Stevenage it is a tributary of the River Beane.
Course
Stevenage Brook rises next to the A602 road in Stevenage, flowing through the Stevenage Golf Course, a tributary joins the Stevenage Brook, which is Aston End Brook, and then it later joins the River Beane near Watton at Stone. It has a total length of and a catchment area of . Stevenage Brook is one out of the twenty-three bodies in the Lee Upper Operational Catchment.
Hydrology The river level data of Stevenage Brook is listed on the table below. +Stevenage Brook Water LevelsMeasuring StationDeepest Level Recorded Date of Deepest Level Normal Depth RangeBragbury Park17 July 2025 to
The station at Bragbury Park is a flat V-weir at a width of and it was constructed in 1974.
Water quality
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.
The water quality of the Stevenage Brook system was as follows in 2022. +Water bodyWater body typeEcological Status Biological quality elementsCatchment AreaLengthHydromorphological Designation Stevenage BrookRiverNot designated as artificial or heavily modified.
Ecology 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.
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.
Several invasive species on the brook include: Giant Hogweed, Himalayan balsam and Canadian goldenrod they are present on the Stevenage Brook.
References