Case study:Restoration of Longinoja brook

0.00

(0 votes)

To discuss or comment on this case study, please use the discussion page.

Location: 60° 14' 54.16" N, 25° 1' 36.90" E

Edit location

Loading map...

{"format":"googlemaps3","type":"HYBRID","minzoom":false,"maxzoom":false,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":50,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"... further results","default":"","import-annotation":false,"width":"auto","height":"400px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"visitedicon":"","wmsoverlay":false,"zoom":14,"layers":[],"controls":["pan","zoom","type","scale","streetview","rotate"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"resizable":false,"kmlrezoom":false,"poi":true,"cluster":false,"clustergridsize":60,"clustermaxzoom":20,"clusterzoomonclick":true,"clusteraveragecenter":true,"clusterminsize":2,"imageoverlays":[],"kml":[],"gkml":[""],"searchmarkers":"","fullscreen":false,"scrollwheelzoom":false,"showtitle":false,"hidenamespace":true,"template":"Location map popup","userparam":"","activeicon":"","pagelabel":false,"ajaxcoordproperty":"","ajaxquery":"","locations":[{"text":"\u003Cp\u003E\u003Cbr /\u003E\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EProject Title:\u003C/b\u003E Restoration of Longinoja brook\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003ECountry:\u003C/b\u003E \u003Ca href=\"/wiki/index.php?title=Finland\" title=\"Finland\"\u003EFinland\u003C/a\u003E\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EProject Status:\u003C/b\u003E Complete\n\u003C/p\u003E\u003Cp\u003E\u003Cb\u003EThemes:\u003C/b\u003E Social benefits\n\u003C/p\u003E\u003Cp\u003E\u003Cbr /\u003E\n\u003C/p\u003E","title":"Restoration of Longinoja brook","link":"","lat":60.2483788,"lon":25.0269179,"icon":"/wiki/images/c/ce/Green_marker.png"}]}

Left click to look around in the map, and use the wheel of your mouse to zoom in and out.

Project overview

Edit project overview

Status	Complete
Project web site	http://www.ymparisto.fi/default.asp?node=27550&lan=fi
Themes	Fisheries, Habitat and biodiversity, Hydromorphology, Social benefits
Country	Finland
Main contact forename	Harri
Main contact surname	Aulaskari
Main contact user ID
Contact organisation	Centre for Economic Development, Transport and the Environment for Uusimaa, Finnish Environment Institute
Contact organisation web site
Partner organisations
This is a parent project encompassing the following projects

Longinoja after restauration_may 2006 (photo: Liisa Laitinen)

Project summary

Edit project overview to modify the project summary.

Longinoja brook has been restored several times during years 2006-2011. The straightened brook flows through densely populated area and partly along cultivated area. The brook is situated in the city of Helsinki. Longinoja brook is an important breeding area for the sea trout of the Vantaanjoki River. The aims of restorations was to create and increase the breeding possibilities for migrating fish and also to improve the area’s landscape. Restoration was part of the project where modern environmental hydraulic engineering methods were studied in the areas with fine-grained soils. The planning aimed to enhance natural conditions and at the same time maintain sufficient drainage level. The restoration project has been a good example of a succeeded co-operation between different organizations and stakeholders. The project was managed by the Finnish Environmental authorities (Finnish Environment Institute and The Centre for Economic Development, Transport and the Environment) and the city of Helsinki. The restoration work was mostly accomplished by volunteers in co-operation with the authorities.

Monitoring surveys and results

This case study hasn’t got any Monitoring survey and results, you can add some by editing the project overview.

Lessons learnt

This case study hasn’t got any lessons learnt, you can add some by editing the project overview.

Catchment and subcatchment

Select a catchment/subcatchment

Edit the catchment and subcatchment details
(affects all case studies in this subcatchment)

Catchment

River basin district	Southern Finland
River basin	Vantaanjoki River

Subcatchment

River name	Longinoja brook
Area category	10 - 100 km²
Area (km2)	12 km²1,200 ha <br />
Maximum altitude category
Maximum altitude (m)
Dominant geology
Ecoregion	Fenno-Scandian Shield
Dominant land cover	Urban
Waterbody ID

Site

Edit site

Name	Cathment of Longinoja brook
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology	Straight
Reference morphology	Sinuous
Desired post project morphology
Heavily modified water body	true
National/international site designation
Local/regional site designations	multiple designations across the site
Protected species present
Invasive species present
Species of interest
Dominant hydrology	Ephemeral
Dominant substrate
River corridor land use	Urban
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

Edit project background

Reach length directly affected (m)
Project started	2006/01/01
Works started
Works completed	2011/01/01
Project completed
Total cost category	10 - 50 k€
Total cost (k€)	10000 k€10,000,000 € <br />
Benefit to cost ratio
Funding sources	Finnish Environment Institute

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			Finnish Environment Institute

Reasons for river restoration

Edit reasons for restoration

Mitigation of a pressure
Hydromorphology	Continuity for organisms, Continuity of sediment transport
Biology	Fish: Species composition, Fish: Abundance, Fish: Disturbance-sensitive species, Invertebrates: Abundance
Physico-chemical
Other reasons for the project	Landscape enhancement

Measures

Edit Measures

Structural measures
Bank/bed modifications	Building fishways, Building of submerged weirs and pits, Adding sinuosity, Introducing gravel
Floodplain / River corridor
Planform / Channel pattern	Introducing sinuosity, Introducting large woody debris
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other	Information provision, Participation in works, Participation in monitoring

Monitoring

Hydromorphological quality elements

Edit Hydromorphological
quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative
Continuity for organisms						Awaiting results
Continuity of sediment transport						Awaiting results

Biological quality elements

Edit biological
quality elements

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative
Fish: Abundance						Awaiting results
Fish: Disturbance-sensitive species						Awaiting results
Fish: Age structure						Awaiting results
Invertebrates: Abundance						Awaiting results

Physico-chemical quality elements

Edit 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

Edit Other responses

Element	When monitored		Type of monitoring		Control site used	Result
	Before measures	After measures	Qualitative	Quantitative
Landscape enchansement		Yes				Awaiting results

Monitoring documents

Upload monitoring documents

Image gallery

Edit Image gallery

Longinoja after restauration may 2006 (photo: Liisa Laitinen)

Longinoja restauration march 2006 (photo: Jukka Jormola)

Longinoja brook after restoration (photo: Lasse Jarvenpaa; www.itamerihaaste.net)

Stream restoration by voluntary work_Longinoja Brook_May 2012 (photo: Auri Sarvilinna; www.environment.fi)

After restauration (photo: Liisa Laitinen; www.itamerihaaste.net)

Before restauration (photo: Harri Aulaskari; www.itamerihaaste.net)

Spowning trout on a restored Longinoja gravel bad (photo: Juna Salomen, www.ecrr.org.)

Additional documents and videos

Upload additional documents

Additional links and references

Edit links and references

Link	Description
http://www.ecrr.org/publication/ecrrbrochure.pdf	ACRR Addressing practitioners, The Longinoja and Matapuro Brook Projects
http://www.itamerihaaste.net/files/327/Pellikka City of Helsinki.pdf	Katja Pellikka, Urban brook reflects the catchment area.

Supplementary Information

Edit Supplementary Information