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− | {{Lake problem|Problem=External phosphorus loading from diffuse sources|Additional information=}} | + | {{Lake problem |
− | {{Lake problem|Problem=External phosphorus loading from point sources|Additional information=}} | + | |Problem=External phosphorus loading from diffuse sources |
− | {{Lake problem|Problem=Internal phosphorus loading|Additional information=}} | + | |Additional information= |
− | {{Lake problem|Problem=Blooms of cyanobacteria|Additional information=}} | + | }} |
− | {{Lake problem|Problem=Too high density of cyprinids|Additional information=}} | + | {{Lake problem |
− | {{Lake problem|Problem=Overgrowth of macrophytes|Additional information=}} | + | |Problem=External phosphorus loading from point sources |
− | {{Restoration measure|Measure=Reduction of external nutrient load from point sources|Start date=2002|End date=|Additional information=New sewage treatment plant}} | + | |Additional information= |
− | {{Restoration measure|Measure=Wetlands or sedimentation ponds|Start date=|End date=|Additional information=Sedimentation pond at inflow}} | + | }} |
− | {{Restoration measure|Measure=Macrophyte removal |Start date=|End date=|Additional information=}} | + | {{Lake problem |
− | {{Restoration measure|Measure=Dredging|Start date=|End date=|Additional information=}} | + | |Problem=Internal phosphorus loading |
− | {{Restoration measure|Measure=Other | + | |Additional information= |
− | {{ | + | }} |
+ | {{Lake problem | ||
+ | |Problem=Blooms of cyanobacteria | ||
+ | |Additional information= | ||
+ | }} | ||
+ | {{Lake problem | ||
+ | |Problem=Too high density of cyprinids | ||
+ | |Additional information= | ||
+ | }} | ||
+ | {{Lake problem | ||
+ | |Problem=Overgrowth of macrophytes | ||
+ | |Additional information= | ||
+ | }} | ||
+ | {{Restoration measure | ||
+ | |Measure=Reduction of external nutrient load from point sources | ||
+ | |Start date=2002 | ||
+ | |End date= | ||
+ | |Additional information=New sewage treatment plant | ||
+ | }} | ||
+ | {{Restoration measure | ||
+ | |Measure=Wetlands or sedimentation ponds | ||
+ | |Start date= | ||
+ | |End date= | ||
+ | |Additional information=Sedimentation pond at inflow | ||
+ | }} | ||
+ | {{Restoration measure | ||
+ | |Measure=Macrophyte removal | ||
+ | |Start date= | ||
+ | |End date= | ||
+ | |Additional information= | ||
+ | }} | ||
+ | {{Restoration measure | ||
+ | |Measure=Dredging | ||
+ | |Start date= | ||
+ | |End date= | ||
+ | |Additional information= | ||
+ | }} | ||
+ | {{Restoration measure | ||
+ | |Measure=Other | ||
+ | |Start date= | ||
+ | |End date= | ||
+ | |Additional information=Cleaning of coastal areas | ||
+ | }} | ||
+ | {{Restoration project | ||
+ | |Description= | ||
+ | |Partners= | ||
+ | |Ylläpito=Asiantuntija | ||
+ | }} | ||
==Something else== | ==Something else== |
Versio 15. tammikuuta 2014 kello 22.51
{{Laatikko2|Sisältö=
This page describes the restoration of Arbi – a smallVirhe lausekkeessa: tunnistamaton välimerkki ”,”. lake in the Tartu County region of Estonia.
Main problems and reasons for restoration
![]() | Too high density of cyprinids |
![]() | Overgrowth of macrophytes |
![]() | Blooms of cyanobacteria |
![]() | External phosphorus loading from diffuse sources |
![]() | Internal phosphorus loading |
Main restoration and management measures
Year of implementation | ||
---|---|---|
![]() | ||
![]() | Dredging | |
![]() | Biomanipulation by fish removal | |
![]() | Other: | |
![]() | Wetlands or sedimentation ponds Sedimentation pond at inflow | |
![]() | On site sewage treatment of scattered settlement | |
![]() | Reduction of external nutrient load from point sources New sewage treatment plant | 2002 |
![]() | 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 |