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Imuta-ike
is a freshwater caldera lake in Satsumasendai, Kagoshima Prefecture, Japan. It forms part of Imutaike Prefectural Natural Park. Its plant communities were designated a Natural Monument of Japan in 1921 and sixty hectares of wetlands were designated a Ramsar Site in 2005.〔(【引用サイトリンク】title=The Annotated Ramsar List: Japan )〕〔(【引用サイトリンク】title=Ramsar Sites in Japan - Imutaike )〕 ==Geography== Imuta-ike is surrounded by mountains; Funamidake (498.8 m), San-o-dake (491 m), Katagi-yama (508.8 m), Tōmigashiro (477 m), Ī-moriyama (432 m, known due to its beauty also as Imuta-fuji), and there is no incoming large river. The outgoing water flows into Sendai River and Hiwagi River. Imuta-ike is in the last stage of the lake-pond formation cycle and is shrinking with the deposition of sediment. The colour of the pond is brown, 14 on the Forel-Ule scale, and its pH is 6.8; the water of the pond contains organic substances.〔Masaaki Tanaka ''Nihon Koshoushi 2 '' 2004, University of Nagoya Press ,ISBN 4-8158-0492-3〕 There are many cherry trees around the pond. About one third of its area, to the northwest, is wetland; dotted by floating islands composed of peat. This is very rare in warm areas and the pond was designated a Natural Monument as the "peat forming vegetation of Imuta-ike" in 1921.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Imuta-ike」の詳細全文を読む
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