Case study:River Wye Habitat Restoration Project

From RESTORE
Jump to: navigation, search
0.00
(0 votes)


To discuss or comment on this case study, please use the discussion page.


Location: 51° 38' 16", -0° 46' 35"
Edit location
Loading map...
Left click to look around in the map, and use the wheel of your mouse to zoom in and out.


Project overview

Edit project overview
Status Complete
Project web site
Themes Environmental flows and water resources, Fisheries, Habitat and biodiversity, Hydromorphology, Social benefits, Urban
Country England
Main contact forename Joshua
Main contact surname Robins
Main contact user ID User:JoshRRC
Contact organisation High Wycombe District Council; River Restoration Centre
Contact organisation web site
Partner organisations Five Rivers Environmental Contracting Ltd (5R), Environment Agency, Wild Trout Trust, Chiltern Society, Chiltern Chalk Streams Project, Wycombe Wildlife Group, High Wycombe Society
Parent multi-site project
This is a parent project
encompassing the following
projects
No
Project picture

Project summary

Edit project overview to modify the project summary.


This project is located on Desborough recreation grounds towards the west of Wycombe. The river Wye flows through council parkland which is surrounded by domestic and commercial developments and two busy roads. It is a popular site for dog walking and is used regularly by the local community and school. It's a highly valued recreational area.


Aims

  • Increased habitat diversity within the watercourse and along marginal zones to include the increase and diversity of nursery habitat.
  • Enhance local aquatic vegetation, benthic communities and fish populations helping to improve ecological status (as measured under the WFD).
  • Improve ecosystem services and aesthetic value for the local community and park users.


Implementations

  • Remove and dispose of concrete revetment from the banks of selected sections of watercourse.
  • Remove and remediate a concrete fish-pass, which is largely ineffective, favor of a more naturalised channel.
  • Excavate a new meander in place of the fish-pass to lengthen the watercourse and decrease water velocity.
  • Re-grade and re-profile the river bed and banks in selected sections to reduce the width of over-wide channels and create a narrower self-cleansing system.
  • Define a more sinuous bank edge with coir rolls and brushwood faggots.
  • Install soft revetment along selected sections of the river helping to promote marginal growth and prevent bank erosion.
  • Restore and enhance marginal vegetation through planting of aquatic and marginal plants.
  • Engage with local schools and provide learning opportunities for pupils.


As well as these there were also a few smaller actions that the project looked to do. These included the use of environmentally friendly plant equipment a vibrating post driver which is more environmentally friendly than a regular post driver. Like most restoration projects there were also some constraints that had to be considered. These included flood risk, project waste disposal and maintaining park safety. In total the project cost £80,000 and took 25 days.

Monitoring surveys and results

This case study hasn’t got any Monitoring survey and results, you can add some by editing the project overview.

Lessons learnt

This case study hasn’t got any lessons learnt, you can add some by editing the project overview.


Image gallery


New flow deflectors (High Wycombe District Council)
Before and after image (High Wycombe District Council)
Before during and after image (High Wycombe District Council)
ShowHideAdditionalImage.png


Catchment and subcatchment

Catchment

River basin district Thames
River basin Thame and South Chilterns

Subcatchment

River name Wye (Source to High Wycombe fire station)
Area category 10 - 100 km²
Area (km2)
Maximum altitude category 200 - 500 m
Maximum altitude (m) 265
265 m
0.265 km
26,500 cm
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Arable and Horticulture
Waterbody ID GB106039023890



Site

Name
WFD water body codes GB106039023890
WFD (national) typology
WFD water body name Wye (Source to High Wycombe fire station)
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 2014/06/01
Works started 2014/06/16
Works completed 2014/07/11
Project completed 2014/07/11
Total cost category
Total cost (k€) 80
80 k€
80,000 €
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

Mitigation of a pressure
Hydromorphology
Biology
Physico-chemical
Other reasons for the project


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

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



Additional documents and videos


Additional links and references

Link Description

Supplementary Information

Edit Supplementary Information