Flooding experts say Britain will have to adapt to climate change  Home / Gardening

Source:



“You are looking at retreat,” says Prof Colin Thorne, a flooding expert at the University of Nottingham. “It is the only sensible policy – it makes no sense to defend the indefensible.” This assessment of how the UK will have to adapt to its increasing flood risk is stark, but is shared by virtually all those who work on the issue.Centuries of draining wetlands, reclaiming salt marshes and walling in rivers is being put into reverse by climate change, which is bringing fiercer storms, more intense downpours and is pushing up sea levels. Sea walls are now being deliberately allowed to be breached, with new defences built further back, and fields turned into lakes to slow the rush of the water, as flood management turns back towards natural methods.Thorne says the strategy of once more “making space for water” has been around for a decade, but the urgency of implementing it has increased sharply. “We thought then we were talking about the 2030s, but it is all happening a heck of a lot quicker.”
Large parts of southern England had their wettest January ever recorded, the Met Office announced on Thursday, and the Somerset Levels, much of which is below sea level, have been inundated for weeks. "I have enormous sympathy for these people," says Thorne. But he thinks the 1,000-year history of keeping the sea out of the area is coming to the end. "Can the Somerset Levels be defended between now and the end of the century? No," he says.
Hannah Cloke, a flooding expert at the University of Reading, agrees: "We could make the choice to protect the Levels forever, but that is going to take a lot of resources. My gut feeling is that you are going to have to let that be a marshland in the end. But people live there and have their livelihoods there, so it is very tricky." Cloke says greatest priority across the country is giving people the help they need to adjust to more frequent floods, from warnings and emergency planning down to home-level protection, such as water-absorbing green roofs and porous paving stones. She points to a small but growing trend of riverbank homes being raised on stilts.
"We have to realise we cannot defend at all costs. We have to adapt to climate change," says Professor Rob Duck, a coastal expert at the University of Dundee, noting that Hull, Norfolk, Suffolk, and the Wirral are places at risk. "Building higher and higher walls is not the answer." Big flood defences often just shift the problem elsewhere, he says, or cause an even greater catastrophe when they eventually breach.
Ola Holmstrom, UK head of water at consultancy firm WSP, says the hard choices must be taken soon: "Unfortunately increasing urbanisation and climate change means the question of flood risk management is not going to go away. Someone will need to make some tough decisions, and for the benefit of those currently flooded and those whose livelihood depends on the land, it would be best if this happens sooner than later."
Government-funded landscape experiments in Somerset and Yorkshire are demonstrating that blocking upland drainage channels, replanting trees next to rivers and deliberately flooding fields can protect downstream homes by slowing the flow of water, which stops waters rising fast and reduces the silting up of channels.

キーワード
Crown Capital
management
environmental monitoring

このノウハウを評価する

評価、コメントするにはサービスに登録してください。

サービス登録をする

コメントを見る

コメントするにはサービスに登録してください。

サービス登録をする

FC2ID新規登録

ログイン

▲ PageTop