Case study:Southington River Restoration Project

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Location: 51° 14' 41.51" N, 1° 16' 16.57" W

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Project overview

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Status	Complete
Project web site
Themes	Economic aspects, Environmental flows and water resources, Fisheries, Flood risk management, Habitat and biodiversity, Spatial planning, Urban
Country	England
Main contact forename	Heb
Main contact surname	Leman
Main contact user ID
Contact organisation	Environment Agency SSD
Contact organisation web site	http://.gov.uk
Partner organisations	Natural England
This is a parent project encompassing the following projects

Image showing location of removed structure and newly improved surrounding area

Project summary

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Removal of a historic impounding structure on the River Test at Overton and the restoration of 400m of channel upstream. The reach include x2 crescent rock ramps to retain the head and spread it over a longer distance.

Monitoring surveys and results

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There was no official monitoring at this site.

Lessons learnt

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No real lessons. Just make sure you get it right before you start.

Image gallery

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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) 400m0.4 km <br />40,000 cm <br /> Project started 2017/06/01 Works started 2017/09/20 Works completed 2017/12/21 Project completed 2017/12/21 Total cost category 50 - 100 k€ Total cost (k€) Benefit to cost ratio Funding sources Test and Itchen River Restoration Strategy and landowner contribution Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design Stakeholder engagement and communication 50 - 100 k€ Environment Agency Heb Leman Works and works supervision Environment Agency Heb Leman Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure The River Test is one of the best examples of a Chalk River in England supporting diverse plant and wildlife species. As such, it is designated a Site of Special Scientific Interest (SSSI). 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 Supplementary Information Edit Supplementary Information