Case study:Nar SSSI project

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Location: 52° 41' 59.18" N, 0° 36' 42.61" E

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Project overview

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Status	Complete
Project web site
Themes	Spatial planning, Hydromorphology, Monitoring
Country	England
Main contact forename
Main contact surname
Main contact user ID
Contact organisation	Environment Agency
Contact organisation web site
Partner organisations
This is a parent project encompassing the following projects	No

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Project summary

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Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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Catchment

River basin district	Anglian
River basin	North West Norfolk

Subcatchment

River name	Nar
Area category
Area (km2)
Maximum altitude category
Maximum altitude (m)
Dominant geology
Ecoregion
Dominant land cover
Waterbody ID

Site

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Name	Narbough Trout Fishery
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology	Single channel, Straight, Embanked, High width:depth
Reference morphology	Sinuous, Pool-riffle
Desired post project morphology
Heavily modified water body	true
National/international site designation
Local/regional site designations
Protected species present
Invasive species present
Species of interest
Dominant hydrology	Groundwater
Dominant substrate	Silt, Sand
River corridor land use	Urban, Woodland, Grassland
Average bankfull channel width category	10 - 50 m
Average bankfull channel width (m)
Average bankfull channel depth category	5 - 10 m
Average bankfull channel depth (m)
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)	1000 m1 km <br />100,000 cm <br />
Project started	2011/02/01
Works started
Works completed	2011/03/01
Project completed
Total cost category	Less than 10 k€"Less than 10 k€" is not in the list (Less than 1 k€, 1 - 10 k€, 10 - 50 k€, 50 - 100 k€, 100 - 500 k€, 500 - 1000 k€, 1000 - 5000 k€, 5000 - 10000 k€, more than 10000 k€) of allowed values for the "Total cost category" property.
Total cost (k€)	3 k€3,000 € <br />
Benefit to cost ratio
Funding sources

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 defence
Hydromorphology	Quantity & dynamics of flow, Flow velocities, Channel pattern/planform
Biology
Physico-chemical
Other reasons for the project	Enhancement of flow diversity

Measures

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Structural measures
Bank/bed modifications	Creation of shoulders, Material was removed from bed to build out banks, Creation of pools downstream
Floodplain / River corridor
Planform / Channel pattern	Narrowing of channel
Other	Maintain water vole habitat
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other

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
Flow velocities	Yes	Yes	Yes			Awaiting results
Quantity & dynamics of flow	Yes	Yes	Yes			Awaiting results

Biological quality elements

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quality elements

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

Physico-chemical quality elements

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quality elements

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

Any other monitoring, e.g. social, economic

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

Monitoring documents

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Image gallery

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Additional documents and videos

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Additional links and references

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Link	Description

Supplementary Information

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