Waterpraxis

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Start Pilot areas Finland: improving the ecological state of rivers - implementation of river basin management plan in Liminika and Tyrnävä landscapes

Finland: improving the ecological state of rivers - implementation of river basin management plan in Liminika and Tyrnävä landscapes

River in June. Photos Seppo Hellsten
River in June. Photos Seppo Hellsten

Results with co-operation
As a part of Waterpraxis project the Centre for Economic Development, Transport and the Environment for North Ostrobothnia has started a restoration project in rivers discharging to the Liminganlahti Bay.

Two working groups will plan measures and project ideas for best practices for improving the ecological state and the recreational utility value of the rivers. Working groups consist of local inhabitants, municipal decision-makers, farmers, fishers, etc...

Anne taking  biological samples. Photo Minna Kuoppala.
Anne taking biological samples. Photo Minna Kuoppala.
Rivers and their main environmental problems
The drainage area of the River Temmesjoki covers almost totally Liminka and Tyrnävä municipalities. Tributaries the River Tyrnävänjoki and the River Ängeslevänjoki discharge to the River Temmesjoki near the River mouth. The River Liminganjoki is connected to the River Temmesjoki with a channel. Water quality is strongly affected by great amount of peatland especially in upper parts of the area.
Arctic bramble (Rubus arcticus). Photo Anne Rytkönen.
Arctic bramble (Rubus arcticus). Photo Anne Rytkönen.
Peatlands are partly intensively drained and partly protected by nature conservation act. Lower parts of the area are in intensive agricultural use. Due to drainage, dredging and low lake percentage water runs quickly through the river leaving it often very dry during summertime.

Esa measuring flow in the River Ängeslevänjoki. Photo Jaana Rintala
Esa measuring flow in the River Ängeslevänjoki. Photo Jaana Rintala

The River Temmesjoki and tributaries are not in good ecological state: pH is occasionally very low due to drainage in acid sulphate soils and high nutrient concentrations cause eutrophication. Also eroding riverbanks and low water level in summer are harmful for ecological state and recreational use. Suspended solids accumulate in river pools, delta and the Liminganlahti Bay. The Liminganlahti Bay is internationally significant nature conservation area. Its flood meadows are important resting areas for migrating birds.

Improving the ecological state of the River Temmesjoki and tributaries is a demanding task where early start and effective co-operation is essential.

 

More information: Planner Jaana Rintala, tel. 040 7139 260, email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Temmesjoki pilot website: www.ymparisto.fi/syke/temmesjoki
Waterpraxis in Finnish: www.ymparisto.fi/syke/waterpraxis

Liminganlahti Bay


Farm in the middle part of  the River Ängeslevänjoki. Photo Jaana Rintala.
Farm in the middle part of the River Ängeslevänjoki. Photo Jaana Rintala.
River in June. Photos Seppo Hellsten.
River in June. Photos Seppo Hellsten.
pilot_area_temmes_monitoring ph_aengesklevaenjoki
Continuous pH monitoring with loggers. Photo Jaana Rintala.