Revision as of 10:00, 12 February 2014

Vääräjoki - Niskakoski

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Key features of the case study

Vääräjoki is a mid-sized lowland river with 835 km2 catchment area. The river is altogether 107 km long and descends 110 metres from its source to the confluence of the rivers Vääräjoki and Kalajoki.

Water quality of Vääräjoki is deteriorated due to human activities in the catchment. 12 % of the catchment area is in agricultural use. Also forestry activities, such as land draining by ditches, increase the nutrient load and suspended solids.

Site description

Measures selection

Success criteria

Ecological response

Hydromorphological response

Monitoring before and after implementation of the project

Socio-economic aspects

Contact person within the organization

Extra background information

References

Related Measures

• Improve water retention
• Add/feed sediment
• Shallow water courses
• Add sediments
• Initiate natural channel dynamics to promote natural regeneration
• Reduce impact of dredging
• Recreate gravel bar and riffles
• Lower river banks or floodplains to enlarge inundation and flooding
• Other measures

Related Pressures

• Sediment discharge from dredging
• Hydrological regime modification
• Artificial barriers upstream from the site
• Alteration of instream habitat
• Embankments, levees or dikes
• Channelisation / cross section alteration