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

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Location: 52° 40' 57", -0° 29' 19"
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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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Catchment and 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) 195
195 m
0.195 km
19,500 cm
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Arable and Horticulture
Waterbody ID GB105031050490



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

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

Mitigation of a pressure
Hydromorphology Flow velocities
Biology Fish: Abundance, light availability
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications
Floodplain / River corridor Habitat enhancement
Planform / Channel pattern Channel narrowing, Removal of channel blockages
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other


Monitoring

Hydromorphological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Biological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

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

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative


Monitoring documents



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Additional links and references

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Supplementary Information

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