and fauna. Gravel is also missing from the river, due to the dams. This has caused erosion below the dam at Iffezheim. To counter this, 173000 m3 per year of a mixture of sand and gravel with an average grain diameter of 20 mm (corresponding to the local sediment transport capacity) has been dumped into the river, since 1978, using two motorized barges.

Integrated Rhine Programme (IRP)

The Upper Rhine plays a key role in flood control

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