Case study:Restoration of Myllypuro brook

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Location: 60° 19' 56", 24° 30' 7"
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Project overview

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Status Complete
Project web site
Themes Habitat and biodiversity, Hydromorphology
Country Finland
Main contact forename Auri
Main contact surname Sarvilinna
Main contact user ID
Contact organisation Finnish Environment Institute
Contact organisation web site http://www.ymparisto.fi/default.asp?node=12122&lan=fi
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.

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Image gallery


Myllypuro brook sinousity after restauration(photo.Liisa Laitinen).jpg
Restauration adding sinousity imitation of natural channel.jpg
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Catchment and subcatchment

Catchment

River basin district
River basin

Subcatchment

River name Myllypuro brook
Area category 10 - 100 km²
Area (km2) 25 km²
2,500 ha
Maximum altitude category
Maximum altitude (m)
Dominant geology Organic (i.e. Peat)
Ecoregion Fenno-Scandian Shield
Dominant land cover Woodland
Waterbody ID



Site

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 m
0.0022 km
220 cm
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

Reach length directly affected (m) 3600 m
3.6 km
360,000 cm
Project started 2002/01/01
Works started
Works completed 2003/01/01
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
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Works and works supervision
Post-project management and maintenance
Monitoring



Reasons for river restoration

Mitigation of a pressure
Hydromorphology Quantity & dynamics of flow, Width & depth variation, Flow velocities, Continuity of sediment transport
Biology
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Adding sinuosity
Floodplain / River corridor
Planform / Channel pattern Re-instatement of old course
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
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

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
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Any other monitoring, e.g. social, economic

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


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Supplementary Information

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