IJsseloog
Coordinates: 52°36′N 5°45′E / 52.600°N 5.750°E
The IJsseloog 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 of the lake Ketelmeer also aims to deepen the channel leading to the mouth of the IJssel (at least a depth of 3.5m). Thus, it aims to improve access to the river for navigation.
During the construction of IJsseloog, a major concern was to preserve the water table and environment 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 for local residents, the deposit was built in the centre of the lake and not on the coast. IJsseloog is also a target of 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 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 of 23 million m³.
On the border, a port was built. Once the deposit is completed, remediation will be done by decantation. Clean silt will be used for construction of a 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.