Case study:Highland Water at Warwickslade Lawn

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Location: 50° 51' 28.12" N, 1° 36' 31.52" W

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Project overview

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Status	Complete
Project web site
Themes	Flood risk management, Habitat and biodiversity
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
This is a parent project encompassing the following projects

Re-meandering of the restored river

Project summary

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As part of a EU Life project there was a programme of habitat restoration in SSSIs, into which the Highland Water at Warwickslade fell. The project looked to return the river to it's historical course (determined through the study of historical maps), including re-meandering. A number of work measures were undertaken to reduce the speed of the flow, subsequently reducing bank erosion, and to improve the habitat quality.

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	South East
River basin	New Forest

Subcatchment

River name	Highland Water
Area category	10 - 100 km²
Area (km2)
Maximum altitude category	100 - 200 m
Maximum altitude (m)	121121 m <br />0.121 km <br />12,100 cm <br />
Dominant geology	Siliceous
Ecoregion	Great Britain
Dominant land cover	Broadleaved Woodland
Waterbody ID	GB107042016720

Other case studies in this subcatchment: New Forest LIFE project

Site

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Name	Highland Water
WFD water body codes	GB107042016720
WFD (national) typology	Low, Small, Siliceous
WFD water body name	Highland Water
Pre-project morphology
Reference morphology
Desired post project morphology
Heavily modified water body	No
National/international site designation	UK - Site of Special Scientific Interest
Local/regional site designations
Protected species present	No
Invasive species present	No
Species of interest
Dominant hydrology
Dominant substrate
River corridor land use
Average bankfull channel width category
Average bankfull channel width (m)
Average bankfull channel depth category
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)	3000 m3 km <br />300,000 cm <br />
Project started	2009/06/01
Works started
Works completed
Project completed	2009/11/01
Total cost category	1 - 10 k€
Total cost (k€)	4 k€4,000 € <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
Hydromorphology
Biology
Physico-chemical
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications	Gravel placement, Planting
Floodplain / River corridor
Planform / Channel pattern	Re-meandering
Other
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

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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Addition of woody debris to the river to significantly reduce flow velocities, October 2009

To avoid damage to the site in construction, a minature railway track was created to transport materials and machinery. October 2009

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/highland%20water%20at%20warwickslade%20lawn.pdf	River Restoration Centre Case Study

Supplementary Information

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