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|Title:||General Description of Partly Meromictic Hypertrophic Lake Verevi, its Ecological Status, Changes during the Past Eight Decades, and Restoration Problems|
|Authors:||OTT Ingmar; KÕIV Toomas; NOGES PEETER; KISAND Anu; JÄRVALT Ain; KIRT Enno|
|Citation:||HYDROBIOLOGIA vol. 547 no. 1 p. 1-20|
|JRC Publication N°:||JRC31812|
|Type:||Articles in Journals|
|Abstract:||Lake Verevi (surface 12.6 ha, mean depth 3.6 m, maximum depth 11 m, drainage area 1.1 km2, water exchange 0.63-times per year) is a hypertrophic hardwater lake located in town Elva (6400 inhabitants). Long-term complex limnological investigations have taken place since 1929. The lake has been contaminated by irregular discharge of urban wastewaters from oxidation ponds since 1978, flood from streets, and infiltrated waters from the surrounding farms. The so-called spring meromixis occurred due to extremely warm springs in recent years. The index value of buffer capacity of Lake Verevi calculated from natural conditions is on the medium level. Water properties were analysed according to the requirements of the EU Water Framework Directive.|
|JRC Institute:||Institute for Environment and Sustainability|
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