Located in NE part of the Netherlands. Twenteekanaal goes from the
Ijssel near Zutphen through Hengelo and Enschede.
of waterway: transport canal, 122 km long and appr. 35 m
wide. Some parts of the wall of the canal were constructed with
iron sheet pile. It is an ideal route for cargo ships.
type and problem: sludge – heavy metals, organics, pesticides, and
The thickness and extent of the sludge layer is largely unknown.
Main problem at the Twenteekanaal is the significant amount of
sludge and also metal objects in the water bottom. Due to
increasing traffic on the canals, it has become necessary to start
widening and deepening the canals. Project is being delayed by a
lack of knowledge about the structure of the floor of the canal.