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Lillsjön (Ulvsunda)
Lillsjön ((スウェーデン語:The Small Lake)) is a small lake in the western suburb Bromma in Stockholm, Sweden. It is one of four lakes in the western suburbs, the other being: Kyrksjön, Judarn, and Råcksta Träsk. Located in the small park Lillsjöparken and surrounded by heavily trafficked artery roads on all sides, it is rich in nutrients with high levels of metals in the sediments. Prospects are to improve the water quality to keep the lake as a locale for birds.〔Lillsjön〕
== Catchment area ==
Lillsjön is a small and shallow lake connected to Ulvsundasjön through a channel, and the flow is periodically reversed with water pouring into the lake. Half of the catchment area is composed of forest and open terrain, part of series of parks constituting a local recreational resource. Heavily trafficked roads take up some 4 per cent and settlements (including allotment-gardens) approximately 20 per cent of the surface. The lake is considered as of great recreational value but of moderate natural importance, except as a breeding locale for many fish species in Lake Mälaren. Motorboats are prohibited in the lake.〔〔Vattenprogram, p. 8.3-8.4〕
The lake is surrounded by the deciduous forest and lawns of the park Lillsjöparken. Three allotment-gardens are found near the lake and 11 ha of the catchment area is occupied by one-family houses. While the inflow from the surrounding area contributed some 200,000 m³ annually, even small variations in water level in Lake Mälaren are of greater importance. Three major artery roads and a ground-level metro track stretches through the area of which Bromma Airport forms a minor part.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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