Difference between revisions of "Case study:Pearls in Peril LIFE+ GB Project - River South Esk"

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|Contact organisation=Scottish Natural Heritage
 
|Contact organisation=Scottish Natural Heritage
 
|Contact organisation url=http://www.snh.gov.uk/protecting-scotlands-nature/protected-species/life-projects/pearls-in-peril/
 
|Contact organisation url=http://www.snh.gov.uk/protecting-scotlands-nature/protected-species/life-projects/pearls-in-peril/
|Partner organisations=Esk District Salmon Fishery Board, Scottish Environment Protection Agency (SEPA),  
+
|Partner organisations=Esk District Salmon Fishery Board, Scottish Environment Protection Agency (SEPA),
 
|Name of parent multi-site project=Case_study:Pearls in Peril LIFE project
 
|Name of parent multi-site project=Case_study:Pearls in Peril LIFE project
 
|Multi-site=No
 
|Multi-site=No
|Project picture=Pearls in Peril 2015 Summary Photos - Moulzie credit EnviroCentre.pdf
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|Project picture=Piplogo.png
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|Picture description=Pearls in Peril logo
 
|Project summary=The River South Esk is designated as a Special Area of Conservation with internationally important populations of freshwater pearl mussel and Atlantic salmon. It is presently assessed as being in ‘unfavourable’ condition by Scottish Natural Heritage (SNH). ‘Pearls in Peril’ is a UK-wide project to safeguard the future of the freshwater pearl mussel.  The project undertook to restore sections of the River South Esk and an important tributary the 'White Water'.  A study was commissioned to  assess the impact of identified bank protection works on natural river processes and habitats important to the freshwater pearl mussel, prioritise sites for restoration and provide restoration designs.
 
|Project summary=The River South Esk is designated as a Special Area of Conservation with internationally important populations of freshwater pearl mussel and Atlantic salmon. It is presently assessed as being in ‘unfavourable’ condition by Scottish Natural Heritage (SNH). ‘Pearls in Peril’ is a UK-wide project to safeguard the future of the freshwater pearl mussel.  The project undertook to restore sections of the River South Esk and an important tributary the 'White Water'.  A study was commissioned to  assess the impact of identified bank protection works on natural river processes and habitats important to the freshwater pearl mussel, prioritise sites for restoration and provide restoration designs.
  

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Location: 56° 52' 0", -3° 10' 24"
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Project overview

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Status Complete
Project web site http://https://www.pearlsinperil.org.uk/
Themes Fisheries, Habitat and biodiversity, Hydromorphology, Water quality
Country Scotland
Main contact forename Jackie
Main contact surname Webley
Main contact user ID User:Pearlsinperil
Contact organisation Scottish Natural Heritage
Contact organisation web site http://http://www.snh.gov.uk/protecting-scotlands-nature/protected-species/life-projects/pearls-in-peril/
Partner organisations Esk District Salmon Fishery Board, Scottish Environment Protection Agency (SEPA)
Parent multi-site project

Case_study:Pearls in Peril LIFE project

This is a parent project
encompassing the following
projects
No
Pearls in Peril logo

Project summary

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The River South Esk is designated as a Special Area of Conservation with internationally important populations of freshwater pearl mussel and Atlantic salmon. It is presently assessed as being in ‘unfavourable’ condition by Scottish Natural Heritage (SNH). ‘Pearls in Peril’ is a UK-wide project to safeguard the future of the freshwater pearl mussel. The project undertook to restore sections of the River South Esk and an important tributary the 'White Water'. A study was commissioned to assess the impact of identified bank protection works on natural river processes and habitats important to the freshwater pearl mussel, prioritise sites for restoration and provide restoration designs.

A total of 21 bank protection sites in the upper river have previously been identified as impacting natural river processes since their construction during the 1990s. These are similar in appearance and purpose, comprising of large rock armour located on meander bends. They are present along three reaches of the upper River South Esk catchment, with nine at Moulzie in upper Glen Clova, eight at Acharn on the White Water upstream the confluence with the River South Esk, and four at Braedownie downstream of Acharn. There are no recorded populations of freshwater pearl mussel in these three river reaches, however downstream populations are influenced by the supply of suitable sediment from these reaches and by the health of the salmonid population.

Following stakeholder engagement,achieving all relevant licences and implementing necessary environmental protection measures; PIP removed 13 sections of rock armour river bank protection followed by bank reprofiling at Moulzie, Acharn and Braedownie as well as the re-connection of three paleochannels - one at Moulzie and two at Acharn on the main stem River South Esk and its tributary the White Water extending to 873m of in-stream river restoration work.

Monitoring surveys and results

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The work was completed in August 2015. Monitoring work is now underway and being implemented by the Esk District Salmon Fishery Board. Following large floods in December 2015 initial observations are showing a wider channel, improved composition of river substrates, availability of new salmonid spawning habitat, channel has become more sinuous.

Lessons learnt

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The timescales involved from conception to completion were longer than anticipated. The site presents a range of environmental sensitivities and land uses that required further consideration as part of the planning and physical works processes.


Image gallery


75106 PIP South Esk 29 June 2016.jpg
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Catchment and subcatchment



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

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

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

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In addition to in-stream restoration, Pearls in Peril (PIP) has worked with a local landowner to implement an agri-environment scheme creating 12ha of wet woodland. PIP successfully applied for additional funding from Angus Environment Trust and with landowner permissions completed fencing and tree planting along 7km of the Quharity Burn, a main tributary of the South Esk.