Case study:Braid Burn at Inch Park

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Location: 55° 55' 46.46" N, 3° 9' 13.24" W

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Project overview

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Status	Complete
Project web site
Themes	Flood risk management, Habitat and biodiversity
Country	Scotland
Main contact forename	Nick
Main contact surname	Elbourne
Main contact user ID
Contact organisation	River Restoration Centre
Contact organisation web site	http://www.therrc.co.uk
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

Braid Burn flooding, Inch Park, March 2010

Project summary

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The artificial burn corridor had little character, with very poor habitat possessing low diversity in species. The restoration project was implemented to improve the environment on the burn corridor and reduce the risk of flooding (to a 1 in 200 year event). During a 2010 flood event the project proved to successfully limit flood waters to designated flood areas.

The works comprised a two stage flood defence scheme with the first stage being a low bund to withhold a 1 in 20 year event. The second stage works involved the construction of clay embankments and sheet pile and concrete walls clad in stone recovered from the park’s boundary wall creating 190,000m³ of flood reservoir storage.

Environmental improvements included lowering artificially raised banks and the concrete channel was replaced with sinuous meanders to restore the watercourse. Wetland areas were created to provide habitat variety.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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Catchment

River basin district	Scotland RBD
River basin	Forth

Subcatchment

River name	Braid Burn
Area category
Area (km2)
Maximum altitude category
Maximum altitude (m)
Dominant geology	Siliceous
Ecoregion	Great Britain
Dominant land cover
Waterbody ID

Site

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Name	Braid Burn
WFD water body codes	3500
WFD (national) typology	Low, Small, Calcareous
WFD water body name	Braid Burn (Upstream Dreghorn Barracks to Portobello)
Pre-project morphology	Artificial channel, Straightened
Reference morphology	Sinuous
Desired post project morphology
Heavily modified water body	Yes
National/international site designation
Local/regional site designations	Urban Wildlife Site
Protected species present	No
Invasive species present	Yes
Species of interest	Otter (Lutra lutra)
Dominant hydrology
Dominant substrate	Gravel
River corridor land use	Urban, Parkland
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

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Reach length directly affected (m)	320m0.32 km <br />32,000 cm <br />
Project started	2009/01/01
Works started
Works completed
Project completed	2012/08/01
Total cost category	more than 10000 k€
Total cost (k€)	40000 k€40,000,000 € <br />
Benefit to cost ratio
Funding sources	40000 k€ as part of a wider regeneration project

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	Flood risk management
Hydromorphology
Biology
Physico-chemical
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications	Embankment creation
Floodplain / River corridor	Floodplain reconnection
Planform / Channel pattern	Creation of sinuosity
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other

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

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Physico-chemical quality elements

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quality elements

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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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Before works - April 2006

Opening new meanders - Jan 2009

Completed channel - Feb 2009

Two years post restoration - May 2011

Wetland area - May 2011

Wetland area in flood - March 2010

Additional documents and videos

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Additional links and references

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Link	Description
http://www.therrc.co.uk/case studies/braid%20burn%20at%20inch%20park.pdf	River Restoration Centre Case Study

Supplementary Information

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