Case study:Test and Itchen River Restoration Strategy

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Project overview

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Status	In progress
Project web site
Themes	Environmental flows and water resources, Fisheries, Flood risk management, Habitat and biodiversity, Hydromorphology, Monitoring
Country	England
Main contact forename	Heb
Main contact surname	Leman
Main contact user ID
Contact organisation	Environment Agency
Contact organisation web site
Partner organisations	Natural England, local fisheries and riparian owners
This is a parent project encompassing the following projects	Old Station Beat restoration, River Test at Bossington, Test and Itchen River Restoration Strategy 2

A River Restoration Centre Members site visit (June 2014) where Test and Itchen Project Officer, Heb Leman (Environment Agency), explained the aims of the restoration strategy. Photo © RRC

Project summary

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The Test and Itchen River Restoration Strategy is a collaborative project between the Environment Agency, Natural England, local fisheries and riparian owners.

Presently the SSSI status of the Test and Itchen is in unfavourable condition. This is due to historic dredging, the number of structures, industry and historic management. The aim of the Strategy is to collaboratively work with landowners to restore both rivers so that they reach favourable condition in the future.

Up to June 2014, approximately 2km has been improved by bed raising, narrowing and encouraging a change in management.

For more information, read the draft technical guide which can be accessed online - the hyperlink for this is listed under 'Additional links' on this case study.

Monitoring surveys and results

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Lessons learnt

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Different sites that have already been restored demonstrate the contrasting ways of contractors working on site. These take into account varying views of the landowners, the aspirations of the fishery and the requirement to improve the SSSI.

Image gallery

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Backwater/ fish refuge on the Park Stream, Bossington Estate (tributary of the River Test) ©RRC

Channel narrowing and bed raising on the Park Stream, Bossington Estate (tributary of the River Test) ©RRC

Gravel infill shows the width of channel narrowing (40-60% of pre-restored channel) to restore a more natural channel on the Park Stream, Bossington Estate (tributary of the River Test) ©RRC

Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body National/international site designation Local/regional site designations Protected species present Invasive species present 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 Edit project background Reach length directly affected (m) Project started Works started Works completed Project completed 2015/03/31 Total cost category Total cost (k€) 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 Environment Agency Stakeholder engagement and communication Environment Agency Works and works supervision Post-project management and maintenance Monitoring Southampton University Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) Other Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit Physico-chemical 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 Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description http://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=1&ved=0CCAQFjAA&url=https%3A%2F%2Fconsult.environment-agency.gov.uk%2Ffile%2F2444733&ei=xly1U6XQLMuO7Qan8ICYDA&usg=AFQjCNEHQ3GbVP6SBPBINP4HXJLaoZ6VzA&sig2=vxWyG8X32kIO3D1mHW5PQg&bvm=bv.70138588,d.ZGU Test & Itchen River Restoration Strategy Technical Report (NOTE: DRAFT) Supplementary Information Edit Supplementary Information