Case study:River Wid restoration scheme

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Location: 51° 39' 48.95" N, 0° 24' 3.76" E

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Project overview

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Status	Complete
Project web site
Themes	Flood risk management, Habitat and biodiversity, Hydromorphology
Country	England
Main contact forename	Tim
Main contact surname	Gardiner
Main contact user ID
Contact organisation	Environment Agency
Contact organisation web site	http://www.environment-agency.gov.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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The river restoration has introduced habitat features which will lead to the restoration of the hydromorphology of the WFD watercourse. Priority species this project may benefit include water voles and eels.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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Site

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Name	River Wid
WFD water body codes	GB105037028690
WFD (national) typology	Low, Small, Calcareous
WFD water body name	Wid
Pre-project morphology	Sinuous
Reference morphology	Sinuous
Desired post project morphology
Heavily modified water body	Yes
National/international site designation
Local/regional site designations
Protected species present	No
Invasive species present	Yes
Species of interest
Dominant hydrology	Groundwater
Dominant substrate	Gravel, Clay
River corridor land use	Intensive agriculture (arable)
Average bankfull channel width category
Average bankfull channel width (m)	88 m <br />0.008 km <br />800 cm <br />
Average bankfull channel depth category
Average bankfull channel depth (m)	1.51.5 m <br />0.0015 km <br />150 cm <br />
Mean discharge category
Mean annual discharge (m3/s)
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)

Project background

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Reach length directly affected (m)	14001,400 m <br />1.4 km <br />140,000 cm <br />
Project started	2012/09/01
Works started	2012/10/01
Works completed	2012/11/01
Project completed	2013/12/01
Total cost category	10 - 50 k€
Total cost (k€)
Benefit to cost ratio
Funding sources	Flood and Coastal Risk Management

Cost for project phases

Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
Investigation and design
Stakeholder engagement and communication
Works and works supervision
Post-project management and maintenance
Monitoring

Reasons for river restoration

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Mitigation of a pressure	Flood risk management
Hydromorphology	Continuity of sediment transport, Channel pattern/planform, Width & depth variation
Biology	Fish, Invertebrates, Macrophytes
Physico-chemical	Nutrient concentrations, dissolve oxygen, pH
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications	Adding sinuosity
Floodplain / River corridor	Increase floodplain connectivity
Planform / Channel pattern	Channel narrowing
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
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Monitoring

Hydromorphological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative

Biological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
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Physico-chemical quality elements

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quality elements

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Any other monitoring, e.g. social, economic

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	Before measures	After measures	Qualitative	Quantitative

Monitoring documents

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Image gallery

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Additional links and references

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Supplementary Information

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