Case study:Syston and Barkston Restoration

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Location: 52° 58' 37.52" N, 0° 38' 5.66" W

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Project overview

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Status	Complete
Project web site
Themes	Fisheries, Habitat and biodiversity
Country	England
Main contact forename	Matt
Main contact surname	Parr
Main contact user ID
Contact organisation	Environement Agency
Contact organisation web site	http://Environement%20Agency
Partner organisations	Wild Trout Trust and Grantham Angling Association Fly Fishing Section
Parent multi-site project	Upper Witham Restoration
This is a parent project encompassing the following projects	No

Channel narrowing and flow deflectors

Project summary

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The habitat in the Barkston Reach was also poor due to the effects of straightening, dredging and impoundment. Siltation of the over-wide riffles and the lack of cover for juvenile and adult fish were identified as key issues and addressing these was the main focus of the enhancement work.

Project Objectives

To modify the bed structure and improve in-stream habitats for fish and invertebrates, including native white-clawed crayfish.
To stabilise eroding riverbanks and reduce fine sediment inputs caused by fluvial processes.
Trap mobile fine sediments from agricultural and other sources.

The enhancement works were planned in two phases and designed by Environment Agency staff in consultation with Grantham Angling Association Fly Fishing Section (GAAFFS) and the riparian landowners.

The Enhancement Schemes

The principal function of the works is to create sections of 2-stage channel where the river has been widened and deepened. Here a variety of channel narrowing structures have been installed just above the normal water level to create a low flow channel, but are readily over-topped as the water level rises to ensure that the capacity of the channel is not compromised. Techniques include brushwood mattresses and enclosures, log flow deflectors and vanes and tree management.

Monitoring surveys and results

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A variety of monitoring techniques have been employed to assess the impacts of the works. These include fixed point photography, along with regular visual inspections to monitor the integrity and performance of the in-stream structures. An annual programme of fine sediment and gravel sampling to monitor changes in the bed substrate has been established and native crayfish surveys will be repeated on a 2 years cycle. Annual fish surveys are already undertaken and show that the brown trout stocks are currently healthy.

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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) Project started Works started Works completed Project completed 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 Stakeholder engagement and communication Works and works supervision Post-project management and maintenance Monitoring 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 Supplementary Information Edit Supplementary Information