Guardian says – among these problems the Environment Agency points out are:
- Massive expense. Once you have started dredging, “it must be repeated after every extreme flood, as the river silts up again”.
- More dangerous rivers: “Removing river bank vegetation such as trees and shrubs decreases bank stability and increases erosion and siltation.”
- The destabilisation of bridges, weirs, culverts and river walls, whose foundations are undermined by deepening the channel: “If the river channels are dredged and structures are not realigned, ‘Pinch Points’ at structures would occur. This would increase the risk of flooding at the structure.” That means more expense and more danger.
- Destruction of the natural world: “Removing gravel from river beds by dredging leads to the loss of spawning grounds for fish, and can cause loss of some species. Removing river bank soils disturbs the habitat of river bank fauna such as otters and water voles.”
If that is so, are the calls for Smith’s head right? I ask only for information.