Tämä on asiantuntijan ylläpitämä sivu. Tietojen muokkaaminen on estetty tavallisilta käyttäjiltä.
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This page describes the restoration of Tuusulanjärvi (21.082.1.001) – a Virhe lausekkeessa: tunnistamaton välimerkki ”,”.Virhe lausekkeessa: tunnistamaton välimerkki ”,”. lake in the Uudenmaan maakunta region of Finland.
Data has been collected in the LakeAdmin project with the aim of sharing good restoration practices throughout Europe. More lakes can be searched in the LakeAdmin Lake Archive.
Data has been collected in the LakeAdmin project with the aim of sharing good restoration practices throughout Europe. More lakes can be searched in the LakeAdmin Lake Archive.
Main problems and reasons for restoration
External phosphorus loading from diffuse sources Mean annual load of phosphorus (from diffuse and point sources): 3837 kg | |
Internal phosphorus loading | |
Blooms of cyanobacteria | |
Too high density of cyprinids | |
External phosphorus loading from point sources Mean annual load of phosphorus (from diffuse and point sources): 3837 kg | |
Other: Oxygen depletion |
Main restoration and management measures
Year of implementation | ||
---|---|---|
Wetlands or sedimentation ponds | ||
Macrophyte removal | ||
Biomanipulation by fish removal | ||
Reduction of external nutrient load from point sources Current P-reduction in treatment of sewage water is 100% | 1979 | |
Dredging | ||
Agricultural management practices | ||
Aeration of hypolimnion |
Effects of the restoration measures
Before restoration | After restoration | ||
---|---|---|---|
Total phosphorus | 0 | 0 | |
Total nitrogen | 0 | 0 | |
Alkalinity | 0 | 0 | |
Transparency | 0 | 0 | |
Chlorophyll-a | 0 | 0 |