Case study:Sågarsfors

This case study is pending approval by a RiverWiki administrator.

Approve case study

0.00

(0 votes)

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

Location: 60° 12' 59.21" N, 24° 14' 42.69" E

Edit location

Loading map...

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
Themes	Habitat and biodiversity
Country	Finland
Main contact forename	Esa
Main contact surname	Lehtinen
Main contact user ID
Contact organisation	Centre for Economic Development, Transport and the Environment for Uusimaa
Contact organisation web site	http://www.environment.fi
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

This case study hasn’t got a picture, you can add one by editing the project overview.

Project summary

Edit project overview to modify the project summary.

The old water power mill at Sågarfors in River Siuntionjoki formed a complete obstacle for migrating fish. The dam was removed and a nature-like bypass channel was constructed to improve the conditions for migrating fish.

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	Siuntionjoki River Basin
River basin

Subcatchment

River name	Siuntionjoki River
Area category	100 - 1000 km²
Area (km²)	230 km²23,000 ha <br />
Maximum altitude category
Maximum altitude (m)
Dominant geology	Organic (i.e. Peat)
Ecoregion	Fenno-Scandian Shield
Dominant land cover
Waterbody ID

Site

Edit site

Name	Sågarsfors dam
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology	Ponded
Reference morphology	Artificial channel
Desired post project morphology
Heavily modified water body
National/international site designation
Local/regional site designations
Protected species present
Invasive species present
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)
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	2007/01/01
Works started
Works completed
Project completed
Total cost category
Total cost (k€)
Benefit to cost ratio
Funding sources	Centre for Economic Development, Transport and the Environment for Uusimaa, SYKE

Cost for project phases

Reasons for river restoration

Edit reasons for restoration

Mitigation of a pressure
Hydromorphology
Biology	Fish
Physico-chemical
Other reasons for the project

Measures

Edit Measures

Structural measures
Bank/bed modifications	Building fishway, Introducing gravel, Building of submerged weirs and pits, Introducing stones
Floodplain / River corridor
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other