Case study:Dove Weir removal

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Location: 53° 2' 0.13" N, 1° 45' 39.48" W

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity, Hydromorphology, Land use management - agriculture, Monitoring, Spatial planning
Country	England
Main contact forename	Nick
Main contact surname	Elbourne
Main contact user ID	User:NickRRC
Contact organisation	River Restoration Centre
Contact organisation web site
Partner organisations	Leek and District Fly Fishing Association
Parent multi-site project
This is a parent project encompassing the following projects	No

River Dove downstream of weir removal, with introduced woody debris

Project summary

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The Leek and District Fly Fishing Association (LDFFA) undertook work to remove an artificial weir in an attempt to restore a more natural flow to the river. The river was also 're-wilded' to introduce woody debris and other material to enhance fish habitats.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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(affects all case studies in this subcatchment)

Catchment

River basin district	Anglian
River basin	Broadland Rivers

Subcatchment

River name	Dove
Area category	100 - 1000 km²
Area (km2)
Maximum altitude category	Less than 100 m
Maximum altitude (m)	6969 m <br />0.069 km <br />6,900 cm <br />
Dominant geology	Calcareous
Ecoregion	Great Britain
Dominant land cover	Arable and Horticulture
Waterbody ID	GB105034045710

Site

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Name	Dovedale
WFD water body codes	GB104028052670
WFD (national) typology
WFD water body name	R Maniford/Dove from R Hamps to R Churnet
Pre-project morphology	Single channel, Impounded, High width:depth, Embanked
Reference morphology	Single channel, Pool-riffle
Desired post project morphology
Heavily modified water body	Yes
National/international site designation	UK - Site of Special Scientific Interest
Local/regional site designations	Area of Special Conservation Interest
Protected species present	No
Invasive species present	No
Species of interest
Dominant hydrology	Artificially regulated
Dominant substrate	Gravel, Silt
River corridor land use	Woodland, Extensive agriculture
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	2010/07/01
Works started
Works completed	2010/08/01
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€)	2 k€2,000 € <br />
Benefit to cost ratio
Funding sources	Leek and District Fly Fishing Association

Cost for project phases

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

Reasons for river restoration

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Mitigation of a pressure	Reservoir impoundment, Abundant weirs
Hydromorphology	Substrate conditions, Channel pattern/planform, Quantity & dynamics of flow
Biology	Fish: Species composition, Fish: Abundance
Physico-chemical
Other reasons for the project	Improvement of ecological value, Enhancement of natural flow

Measures

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Structural measures
Bank/bed modifications	Vegetation cut back
Floodplain / River corridor	Trees felled, Natural debris introduced
Planform / Channel pattern	Removal of a weir, Increase in sinuousity
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)	Warning signs provided to stop public removing debris or rebuilding weirs
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
Substrate conditions	Yes	Yes	Yes			Improvement

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
Fish: Species composition	Yes	Yes		Yes		Awaiting results
Fish: Abundance	Yes	Yes		Yes		Awaiting results

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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Example of an existing weir upstream of works, August 2011

One of the sites of weir removal, August 2011

Introduced woody debris and establishment of vegetation within 12 months, August 2011

Created riffles

Additional documents and videos

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Additional links and references

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Link	Description
http://www.therrc.co.uk/case studies/dove%20at%20dovedale.pdf	River Restoration Centre Case Study

Supplementary Information

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