Climate change is likely to increase demand for flood protection work. For some areas in Europe, greater peak river flows are anticipated with a consequent increased risk of flooding.
The more obvious protection measures frequently introduce additional problems:
Larger channels can reduce flood risk but are expensive, and have a considerable adverse environmental impact.
If river embankments are overtopped, the embankments themselves are at risk from erosion by the overtopping water OSA being placed.
Relatively low value land can be used as temporary flood plains, with overflow waters contained by earth embankments.
Durable erosion protection for flood conditions – either OSA on geotextile or the asphalt-reinforced geomat – may also be placed on the ‘dry’ side of the river embankment Revetment during flood conditions.
The pictures show both measures on a Belgian river.