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The IJsseloog ((:ˈɛisəlˌoːx)) is an artificial island in the Ketelmeer (province of Flevoland, the Netherlands) used as a deposit of silt pollution. Most of that silt was deposited in the Ketelmeer by the IJssel river between 1950 and 1990. Removal of silt soil from the Ketelmeer lake also aims to deepen the channel leading to the mouth of the IJssel (to at least a depth of 3.5m), thus aiming to improve access to the river for navigation. During construction of the IJsseloog, a major concern was to preserve the water table and the environment of Ketelmeer. The silt is to be stored permanently and without any risk of leakage. For now, cleaning the silt is not yet feasible. To avoid nuisance to agriculture and to local residents, the deposit was built in the centre of the lake and not on the coast. IJsseloog is also a target for recreational and ecological development. Two other artificial islands were created: Hanzeplaat and Schokkerbank. The construction of IJsseloog started in 1996 and was completed in 1999. The deposit can hold 20 million cubic metres of silt. In this capacity, 15 million cubic metres are intended for the deposit of silt from the Ketelmeer, and the remaining 5 million cubic metres will be used to deposit silt from elsewhere. The amount of waste that is stored on the island amounts to 23 million m³.〔(【引用サイトリンク】url=http://www.slopeindicator.com/stories/kettelmeer.html )〕 A port was built on the outer edge of the IJsseloog. Once the deposit is completed, remediation will be done by decantation. Clean silt will be used to construct new ecological zone, the IJsselmonding. The clean sludge that is released will be used for the construction of a natural IJssel estuary. A treatment plant began operating in 2000. Its processing station separates sand and peat from contaminants. Purified sand will be used for construction, and the remaining sludge is pumped to storage. When storage is full, the layers of clay and sand will be sealed, and the island itself will be used for recreational purposes. After that process, Nature will take over in the IJsseloog. == References == 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「IJsseloog」の詳細全文を読む スポンサード リンク
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