Case study:Guash Habitat Restoration Project (Phase 1 and 2)

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Location: 52° 40' 56.62" N, 0° 29' 19.17" W

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Project overview

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Status	Complete
Project web site
Themes	Environmental flows and water resources, Fisheries, Habitat and biodiversity, Hydromorphology, Water quality
Country	England
Main contact forename	Joshua
Main contact surname	Robins
Main contact user ID	User:JoshRRC
Contact organisation	River Restoration Centre; Guash Fishing Club
Contact organisation web site
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

Deflectors used to improve the flow of the river

Project summary

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This project was undertaken by the Guash Fishing Club following a report from the Wild Trout Trust. The project has been split into two phases which concentrated on a stretch of the the River Guash between Tolethorpe and Ryhall Rutland. Issues with the stretch included slow velocities, partially blocked channels and a lack of light. The aims and objectives of the project were:

• To allow more light in.
• Remove fallen trees which were obstructing the flow.
• Improve the general flow of the water.
• Create a better environment for fish spawning.

To succeed in reaching these aims and objectives cheap but effective measures were used. The tree canopy was opened up to allow more light into the channel and large branches which were partially blocking the flow were removed. To improve the flow of the water, wooden deflectors were created to narrow the channel and generate more varied flows for fish. As well as this, gravel and silts were deposited to create a better environment for fish spawning.

Monitoring surveys and results

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Following the implementations, the river seems more biologically active with greater fish populations. The flow of the channel is also greatly improved and the issues of slow velocities and silting-up of the channel are no longer present.

Lessons learnt

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Image gallery

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Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Anglian River basin Welland Subcatchment River name North Gwash Area category 10 - 100 km² Area (km2) Maximum altitude category 100 - 200 m Maximum altitude (m) 195195 m <br />0.195 km <br />19,500 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Arable and Horticulture Waterbody ID GB105031050490 Site Edit site Name WFD water body codes GB105031050490 WFD (national) typology WFD water body name North Gwash Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body No National/international site designation 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 Edit project background Reach length directly affected (m) Project started 2012/05/01 Works started Works completed Project completed 2014/03/01 Total cost category Total cost (k€) Benefit to cost ratio Funding sources Environment Agency 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 Flow velocities Biology Fish: Abundance, light availability Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Habitat enhancement Planform / Channel pattern Channel narrowing, Removal of channel blockages (fallen trees) 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