Sicklasjön

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Sicklasjön is a lake in eastern central Stockholm, Sweden. It is bordering the municipalities of Stockholm and Nacka and is named for the vicinity to the urban district Sickla.Sicklasjön, historically known as Långsjön, is connected to Järlasjön east of it through a narrow strait and to Hammarby Sjö west of it through the canal Sickla Kanal and the sluice Sickla Sluss. The lake, forming the northern border of the Nacka Open-air Area, is considered as of significant recreational and natural value. Water flow is periodically important but inconsiderable during summers when the lake remains relatively stratified.Catchment areaThe lake is the last lake in the Sicklaån water system formed in an east-west oriented fissure valley. The catchment area is highly exploited with most of it used for one-family houses, block of flats, offices, industrial areas, and roads. On the southern shore are patches of hardwood forests, a few feeder streams, a promenade, and the old mansion Lilla Sickla Gård south of which are several minor wetlands. The closed stock pile Hammarbybacken containing various types of excavated materials is located within the catchment area. Next to Sickla Kanal is a subterranean plant used to treat sludge disposal. New residential areas have been constructed in the western end of the lake.