Case study:Logie Burn Restoration Project

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Location: 57° 5' 48.29" N, 2° 55' 19.68" W

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity, Hydromorphology, Monitoring
Country	Scotland
Main contact forename	Estelle
Main contact surname	Gill
Main contact user ID
Contact organisation	Scottish Natural Heritage
Contact organisation web site	http://www.snh.gov.uk/
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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The Logie Burn is graded as poor for its ecological status due to diffuse sediment and nutrient inputs in addition to morphological alteration. These issues account for agricultural and drainage demand over many decades. To begin with, the Logie Burn was canalized and dredged of original bed material. Two meanders were cut-off as part of the engineering works for straightening and deepening the burn. In particular, straightening of the Logie burn had adverse effects on in-stream diversity and lowered the burn’s ability to filter out silt being carried downstream.

This project targeted 160 m reach of the Logie Burn and included the re-connection of the two old meanders that were previously sealed off from the main channel. The primary purposes of the re-connection were to restore morphology, improve river habitat, enhance riparian habitat diversity and demonstrate this type of restoration to river managers. Enhancement of in-channel phosphorous storage also contributed to the reduction of the phosphorus transfer into the Loch Davan downstream of the Logie.

A monitoring programme commenced in July 2011 to assess how the geomorphology, habitat, phosphorous storage and the flood attenuation capacity of the reach change over time. Topographical and sedimentary surveys were undertaken before and after the re-connection and will be repeated annually. In addition, stream flow is being continuously monitored to allow assessment of the flood attenuation capacity and to help understand the geomorphic changes observed.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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Site

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Name
WFD water body codes	23372
WFD (national) typology	Mid-altitude, Small, Calcareous
WFD water body name	Logie Burn / Loch Davan
Pre-project morphology
Reference morphology
Desired post project morphology
Heavily modified water body	No
National/international site designation
Local/regional site designations	National Reserve
Protected species present	No
Invasive species present	No
Species of interest
Dominant hydrology	Artificially regulated
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)	1.61.6 m³/s <br />1,600 l/s <br />
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)

Project background

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Reach length directly affected (m)	250250 m <br />0.25 km <br />25,000 cm <br />
Project started
Works started
Works completed
Project completed
Total cost category
Total cost (k€)
Benefit to cost ratio
Funding sources	Scottish Environment Protection Agency, Scottish Natural Heritage.

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

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Mitigation of a pressure
Hydromorphology
Biology
Physico-chemical
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Measures

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Structural measures
Bank/bed modifications
Floodplain / River corridor
Planform / Channel pattern
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Non-structural measures
Management interventions
Social measures (incl. engagement)
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Monitoring

Hydromorphological quality elements

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quality elements

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

Biological quality elements

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quality elements

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

Physico-chemical quality elements

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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

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

Monitoring documents

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Image gallery

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Additional documents and videos

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Additional links and references

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Supplementary Information

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