Case study:Restoration of Myllypuro brook

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Location: 60° 19' 55.88" N, 24° 30' 7.34" E

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Project overview

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Status	Complete
Project web site
Themes
Country	Finland
Main contact forename	Lasse
Main contact surname	Järvenpää
Main contact user ID
Contact organisation
Contact organisation web site
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

Myllypuro brook sinuosity after restauration (photo: Liisa Laitinen)

Project summary

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The Myllypuro brook is located in the Nuuksio Natural Park in Southern Finland. This brook is a pilot case for environmental restoration in Finland. The straightened brook has been restored in 1995-2003. The aim of the project was to restore the channel simulating as far as possible the natural conditions of the channel. The restoration included returning of the historical and devious stream line and also building a flood terrace by the brook. Attention was especially paid to the shape of the channel and the restoration of the flooding. As a pattern for restoration, another reach of the same brook was used. This reach had remained in its natural state. A planning concept based on validated information about the original natural conditions provided a good basis for restoration planning. It was also considered important that the factors limiting the restoration were clearly distinguished.

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
River basin

Subcatchment

River name	Myllypuro brook
Area category	10 - 100 km²
Area (km2)	25 km²2,500 ha <br />
Maximum altitude category
Maximum altitude (m)
Dominant geology	Organic (i.e. Peat)
Ecoregion	Fenno-Scandian Shield
Dominant land cover	Woodland
Waterbody ID

Site

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Name	Cathment of Brook Myllypuro
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology	Sinuous
Reference morphology	Braided, Sinuous, Pool-riffle
Desired post project morphology
Heavily modified water body
National/international site designation	EU - Special Area of Conservation
Local/regional site designations
Protected species present
Invasive species present
Species of interest
Dominant hydrology
Dominant substrate	Bedrock, Clay
River corridor land use	Woodland
Average bankfull channel width category
Average bankfull channel width (m)
Average bankfull channel depth category	2 - 5 m
Average bankfull channel depth (m)	2.2 m0.0022 km <br />220 cm <br />
Mean discharge category
Mean annual discharge (m3/s)
Average channel gradient category
Average channel gradient	0.17
Average unit stream power (W/m2)

Project background

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Reach length directly affected (m)	3600 m3.6 km <br />360,000 cm <br />
Project started	2002/01/01
Works started
Works completed	2003/01/01
Project completed
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Total cost (k€)
Benefit to cost ratio
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Cost for project phases

Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
Investigation and design
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Monitoring

Reasons for river restoration

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Mitigation of a pressure
Hydromorphology	Quantity & dynamics of flow, Width & depth variation, Flow velocities, Continuity of sediment transport
Biology
Physico-chemical
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Measures

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Structural measures
Bank/bed modifications	Adding sinuosity
Floodplain / River corridor
Planform / Channel pattern	Re-instatement of old course
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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
Quantity & dynamics of flow		Yes				Awaiting results
Width & depth variation		Yes				Awaiting results
Channel pattern/planform		Yes				Awaiting results
Continuity of sediment transport		Yes				Awaiting results

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

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	Before measures	After measures	Qualitative	Quantitative

Any other monitoring, e.g. social, economic

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	Before measures	After measures	Qualitative	Quantitative

Monitoring documents

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Image gallery

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Myllypuro brook sinousity after restauration(photo.Liisa Laitinen).jpg

Restauration adding sinousity imitation of natural channel.jpg

Additional documents and videos

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Additional links and references

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Supplementary Information

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