Case study:River Rhee

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Location: 52° 6' 44.25" N, 0° 4' 17.70" W

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity, Hydromorphology
Country	England
Main contact forename	Nick
Main contact surname	Elbourne
Main contact user ID
Contact organisation	River Restoration Centre
Contact organisation web site	http://www.therrc.co.uk
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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Prior to the restoration works, the River Rhee was a typical example of a degraded lowland agricultural river. The river, a base fed brook, had become lost in its channel and was suffering severe siltation problems. Also, the populations of wild brown trout had been in a state of decline.

The restoration project aimed to increase velocities to allow scour and maintain a central, silt-free channel, diversifying the habitat whilst ensuring there was no increase in flood risk. This was achieved through re-grading of the bank to create a shelf as an aquatic plant habitat and a spawning area for a number of fish species. The shelf also narrowed the channel, increasing flow and clearing silt. Stretches of the river were also re-meandered to further diversify flow and, on existing bends, wetlands were created on the inside bend to provide a new habitat. Finally, a backwater was created to provide fish with a refuge during high flows, and habitat for fish fry and invertebrates.

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Lessons learnt

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Catchment and subcatchment

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Catchment

River basin district	Anglian
River basin	Cam and Ely Ouse (including South Level)

Subcatchment

River name	Cam
Area category	100 - 1000 km²
Area (km2)
Maximum altitude category	Less than 100 m
Maximum altitude (m)	2525 m <br />0.025 km <br />2,500 cm <br />
Dominant geology	Calcareous
Ecoregion	Great Britain
Dominant land cover	Arable and Horticulture
Waterbody ID	GB105033042750

Site

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Name	River Rhee at Wendy
WFD water body codes	GB105033038030
WFD (national) typology
WFD water body name	Mill River
Pre-project morphology
Reference morphology
Desired post project morphology
Heavily modified water body	No
National/international site designation
Local/regional site designations
Protected species present	No
Invasive species present	No
Species of interest
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River corridor land use
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Average bankfull channel width (m)
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Project background

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Reasons for river restoration

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Mitigation of a pressure
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Measures

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Monitoring

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quality elements

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quality elements

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Supplementary Information

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