Torankijärvi (74.031.1.023)/Restoration project
Järvi-meriwikistä
< Torankijärvi (74.031.1.023)
Versio hetkellä 19. toukokuuta 2016 kello 13.54 – tehnyt Molindho (keskustelu | muokkaukset) (Tekstin korvaus – ”|Ylläpito=Asiantuntija” muotoon ”|Ylläpito=expert”)
Tämä on asiantuntijan ylläpitämä sivu. Tietojen muokkaaminen on estetty tavallisilta käyttäjiltä.
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This page describes the restoration of Torankijärvi (74.031.1.023) – a Virhe lausekkeessa: tunnistamaton välimerkki ”,”.Virhe lausekkeessa: tunnistamaton välimerkki ”,”. lake in the Pohjois-Pohjanmaan 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
Blooms of cyanobacteria | |
Overgrowth of macrophytes | |
Internal phosphorus loading | |
External phosphorus loading from point sources Mean annual load of phosphorus (from diffuse and point sources): 54 kg | |
Too high density of cyprinids | |
External phosphorus loading from diffuse sources Mean annual load of phosphorus (from diffuse and point sources): 54 kg | |
Other: Urban stormwater |
Main restoration and management measures
Year of implementation | ||
---|---|---|
Reduction of external nutrient load from point sources Current P-reduction from sewage water: 95% | 1980 | |
Aeration of hypolimnion | ||
Other: Chemical inactivation of phosphorus | ||
Biomanipulation by fish removal | ||
Macrophyte removal |
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 |