Dredging is probably a waste of money.
// The Environment Agency says it spent £45m in the last financial year on improving river flow, including dredging and weed clearance.
It says increased dredging would not have prevented the current flooding in the Somerset Levels - due to the sheer amount of water.
"Dredging is often not the best long term or economic solution compared with other flood risk measures such as building walls or providing storage upstream - and would not reduce flood risk on all the rivers on the Somerset Levels because of their tidal nature," a spokeswoman said.
'Allow floods'
Alastair Chisholm, policy manager at the Chartered Institution of Water and Environmental Management, explained that those in favour of dredging think that a bigger river will allow water to flow faster and more efficiently.
But he said it would not carry enough water when compared to the size of the flood plain - even if the capacity of the river were increased by 50%, it is a relatively small amount when compared to the amount of flooding in the area. //
http://www.bbc.co.uk/news/uk-25911391
The Somerset Levels are a flood Plain. We must just accept that they flood, that is how they were formed and is there function.
But I notice Cameron is acting like a Cnut again.