A large-scale river basin management programme in the northern part of Finland.
Junttila, Kaisa; Paananen, Paula; Rahkila, Riina; Yrjäna, Timo; Luokkanen, Eira; Halonen, Miikka
The River Siuruanjoki is a boreal humic river running through southernmost Lapland and North Ostrobothnia in northern Finland. The catchment area is 2,387 km2 and the MQ 31 m3 s-1. The main loading on the River Siuruanjoki is derived from agriculture, forestry and peat mining, as well as some eutrophicated headwaters. During recent summers there have been algal blooms throughout the length of the river. The Regional Environment Centres of North Ostrobothnia and Lapland, in co-operation with three municipalities, initiated an extensive programme to reduce nutrient loading on the River Siuruanjoki, and to improve both the recreational use of the area and the state of the watercourse itself. Another important aim of the programme is to increase environmental awareness and to inform local people about their possibilities to improve their environment . Reducing the agricultural load has been started by preparing nutrient balances and environmental reviews at a large number of dairy farms. Run-off water from peat mining areas have been conducted to large sedimentation and evaporation ponds and treated by barriers made of woody chips. The programme has offered guidance and subsidises for waste water treatment of farms and households outside the sewage systems. Removal of fish has been started in seven lakes and aeration intensified in one lake.