Case study:River Rea Restoration Project: Difference between revisions

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|Project summary=Many watercourses within the River Rea Catchment are failing to meet the required standards under the Water Framework Directive (WFD) due to failing fish numbers. The River Rea has long been known as a catchment in serious decline as a result of sedimentation, poor agricultural practices and fish migration barriers. The Severn Rivers Trust walkover surveys of the River Rea, confirmed that suspended sediment load is seen to be impacting on the ecological health of the river and a major cause of fish failure. Impacts such as agricultural run-off from fields and bank erosion caused by farm animals are major contributors to an excessive quantity of sediment entering the river system. Also good riparian habitats are in decline due to over shading and over mature and diseased alders dying and falling into the river causing excessive blockages and bank erosion scars.
|Project summary=Many watercourses within the River Rea Catchment are failing to meet the required standards under the Water Framework Directive (WFD) due to failing fish numbers. The River Rea has long been known as a catchment in serious decline as a result of sedimentation, poor agricultural practices and fish migration barriers. The Severn Rivers Trust walkover surveys of the River Rea, confirmed that suspended sediment load is seen to be impacting on the ecological health of the river and a major cause of fish failure. Impacts such as agricultural run-off from fields and bank erosion caused by farm animals are major contributors to an excessive quantity of sediment entering the river system. Also good riparian habitats are in decline due to over shading and over mature and diseased alders dying and falling into the river causing excessive blockages and bank erosion scars.
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Revision as of 14:44, 6 September 2013

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Location: 52° 27' 6.57" N, 2° 24' 17.91" W
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Project overview

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Status In progress
Project web site
Themes Economic aspects, Flood risk management, Habitat and biodiversity, Hydromorphology, Land use management - agriculture, Social benefits, Water quality
Country England
Main contact forename Emma
Main contact surname Buckingham
Main contact user ID
Contact organisation Severn River Trust
Contact organisation web site http://severnriverstrust.com/
Partner organisations Natural England, Catchment Sensitive Farming, Environment Agency, Shropshire County Council, Shropshire Hills AONB, Shropshire Wildlife Trust, Severn Trent Water, Cleobury Mortimer Environmental Impact Forum, White Swan Piscatorials, Sustainable Eel Group, Neen Savage Parish Council, Wild Trout Trust, Burwarton, Shakenhurst and Burwarton Estates, Forestry Commission, Burwarton Syndicate
Parent multi-site project
This is a parent project
encompassing the following
projects
No
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Project summary

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Many watercourses within the River Rea Catchment are failing to meet the required standards under the Water Framework Directive (WFD) due to failing fish numbers. The River Rea has long been known as a catchment in serious decline as a result of sedimentation, poor agricultural practices and fish migration barriers. The Severn Rivers Trust walkover surveys of the River Rea, confirmed that suspended sediment load is seen to be impacting on the ecological health of the river and a major cause of fish failure. Impacts such as agricultural run-off from fields and bank erosion caused by farm animals are major contributors to an excessive quantity of sediment entering the river system. Also good riparian habitats are in decline due to over shading and over mature and diseased alders dying and falling into the river causing excessive blockages and bank erosion scars.

Monitoring surveys and results

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Lessons learnt

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Image gallery


River Rea Restoration Project Area
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Catchment and subcatchment

Subcatchment:Severn


Site

Name River Rea Catchment
WFD water body codes
WFD (national) typology
WFD water body name
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 Intensive agriculture (arable)
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
Works started
Works completed
Project completed
Total cost category 1000 - 5000 k€
Total cost (k€) 1084,6571,084,657 k€ <br />1,084,657,000 € <br />
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 Agriculture, Barriers to fish migration
Hydromorphology Continuity for organisms, Substrate conditions
Biology Fish
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Bank improvement
Floodplain / River corridor Removal of barriers
Planform / Channel pattern
Other
Non-structural measures
Management interventions Riparian Management to increase the amount of light getting through the canopy, promote natural re-growth of bankside plants and increase levels of bank stability and stabilise the spread of Phytophthora amongst the Alders, reducing bank side collapse (another main source of sediment)
Social measures (incl. engagement)
Other Community engagement is essential to the long term success of the project as it encourages local ownership and support. It is seen as an integral part of an integrated catchment management approach.


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
http://severnriverstrust.com/ The Severn Rivers Trust is an independent environmental charity established to secure the preservation, protection, development and improvement of the rivers, streams, watercourses and water bodies in the Severn catchment, and to advance the education of the public in the management of water and the wider environment.
http://www.riverrea.com/ The aim of the Rea Catchment Partnership is to restore, protect and sustain a healthy river system within the Rea Catchment.

Supplementary Information

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