by Peter Jones
7 minute read
The flooding that has struck the UK in recent weeks has brought misery and loss to households and travellers in several parts of the UK. In the resulting atmosphere of near-national emergency, our politicians have produced their own deluge of regrettable remarks. Enraged Somerset MP Ian Liddell-Grainger’s comment that he would “stick [Environment Agency chief Lord Smith’s] head down the loo and flush” in order to get his message across takes some beating, However, Nigel Farage’s call for the foreign aid budget to be deployed in Somerset was so daft that even Eric Pickles called it an “easy” and “populist” hit. Of course, the man who published the “bin bible” earlier this year knows whereof he speaks….
Mr Pickles has been standing in for Environment Secretary Owen Paterson, who would have been the man in the eye had he not been the man in eye surgery. I don’t know how much of a hydrologist Pickles is, but he’s been eager to wade in and join the stream of abuse from politicians, Somerset residents and many others directed at the Environment Agency’s decision to cut back on dredging and work. He commented that, “it was a policy not to dredge and the more we know about it the more we know it was a wrong-headed decision.” Apologising for the flooding, he said “I am really sorry that we took the advice … we thought we were dealing with experts.”
Parrett fashion
I can’t claim to be an expert on rivers, still less on the very particular circumstances of the rivers of the Somerset Levels. This low-lying area has gradually been reclaimed from marshland by generations of engineers, who from mediaeval times through to the 1970s have embanked rivers, dug drains and installed pumps. But even focused on such an exceptional area, the ease with which consensus is forming around a policy that lacks expert backing and a narrative that places blame on the Environment Agency is troubling. A potentially damaging connection is being formed in the public consciousness between dredging and flood prevention as politicians, instead of accepting that they were out of their depth in this complex policy area, queued up to repeat the message: “dredging prevents floods”.
It isn’t as though the Agency has been sitting on its hands in Somerset. It has been maintaining the rivers of the Levels: last October it started a programme of de-silting work at ‘pinch point’ locations on the Rivers Tone and Parrett. But it hasn’t just been looking to improve the flow of rivers. At the same time it has been participating in a task force set up after the last floods in 2012/13. This brought together Somerset County Council, the Somerset District Councils, the National Farmers Union (NFU), the Somerset Consortium of Drainage Boards, the Farming and Wildlife Advisory Group, Somerset Wildlife Trust, the Royal Society for the Protection of Birds, and Natural England to produce a joint Vision 2030 document.
Setting the Tone
Alongside river management, the document envisages managing flood plains to accommodate winter flooding; a landscape containing a mix of agricultural land and wet grassland; an end to unsustainable farming practices; and the reconnection of currently fragmented fen and flower-rich meadows. The chairman of the task force, retired NFU representative Anthony Gibson has been amongst those calling for dredging of the Tone and Parrett; but he does so with an appreciation of the particular characteristics of the area.
The extensive embankments mean that in some areas, river levels can be as much as 10 feet above the surrounding landscape. As a result, when the banks are overtopped, flood water cannot run away until river levels have subsided considerably. Flood water can become stagnant, de-oxygenated and polluted, meaning that it can’t be pumped back into rivers without chemical treatment. The result is massive damage both to agricultural land and wildlife areas. Mr Gibson therefore sees maintaining the carrying capacity of rivers as key to protecting agriculture, homes and wildlife. But he also states that dredging would have reduced, but not prevented this winter’s floods; and points out the need for other measures: “action to reduce the speed and volume of run-off from the upper catchment is essential”.
The Somerset Drainage Boards Consortium also gives a clear mention to dredging in its recently published 10-point plan for the Levels, but recognises the role tides have in flooding in the area with a proposal for a tidal sluice on the Parrett. They also highlight the need to reduce urban run-off, to get landowners to fund flood risk management work on their property, and the promotion of adaptation. Similarly, the national Association of Drainage Authorities 10-point plan talks carefully of the limited role of dredging:
“Where the lower parts of a catchment are artificially drained, channels and ditches must be maintained to transmit excess water through the area into the sea as quickly as possible.”
Scraping the bottom of the channel
De-silting has its place in an artificial landscape such as the Somerset Moors and Levels, but even there it has to sit alongside other measures. This nuanced message and the downsides of dredging are getting lost in the clamour. Dredging is:
- Expensive: even the work the Environment Agency undertook on pinch points at on the Tone and Parrett was expected to cost £3.5m.
- Temporary: silt washes downstream (or even upstream in tidal waters) and rapidly re-accumulates in areas that have been dredged. Floods can mobilise large amounts of soil, so that dredging must be repeated frequently. Where dredging results in plants and roots being removed from river beds or banks, it can lead to more potential for silting.
- Often ineffective: Dredging river channels doesn’t give them limitless capacity. A river channel is small compared with the surrounding flood plain and when extreme weather even the most heavily maintained river won’t be able to cope. Removing silt in an area may help prevent flooding there, but simply move the problem downstream.
- Damaging: removing material can disrupt fish spawning grounds, interfere with wetlands and destroy the habitats of animals that dwell in river banks.
It isn’t just the sandal-wearing fraternity saying this: the Chartered Institution of Water and Environmental Management (CIWEM) has just published a report giving a “reality check” on the role of dredging in flood prevention, a timely reminder that other means of managing rivers may be more cheaper and more effective. They are joined by former Environment Minister Richard Benyon, who warned of the dangers of politicians acting as “armchair hydrologists”, looking for scapegoats and making policy in the teeth of a crisis.
Faced with an emergency, it is natural that we reach for solutions. It’s hard to listen to the advice of those whose approach is widely perceived to have failed. However, what Defra and the Environment Agency are guilty of is sticking to their spending rules which require flood prevention measures to demonstrate a cost-benefit ratio of 1:8. Choosing the highest impact projects is hard to argue with – unless you live in an area denied protection because the business case doesn’t stack up. If expenditure is going to be constrained, the inevitable result is going to be that in the extreme weather that seems increasingly frequent, some areas will flood.
One point that struck me in the CIWEM report was their call for better land management to help slow water down and reduce the amount of eroded soil that clogs rivers up. Changes to ploughing techniques, planting cover crops and reduced grazing are all highlighted. For any reader of George Monbiot’s recent book Feral, it’s interesting to see how mainstream ideas such as upstream woody debris dams and reforesting of both uplands and floodplains now seem to be. Other measures recommended include the wider use of measures to reduce urban run-off, such as more permeable paving and green roofs and walls.
The man responsible for the silliest comment made about river management in recent times was Owen Paterson last April. He told the South West Agricultural Conference that “The purpose of waterways is to get rid of water.” When large parts of the country are under water, perhaps it’s natural that the people affected should start to think of rivers primarily in terms of their role in drainage. But when the Environment Secretary seems to regard rivers as just an unreliable part of the nation’s plumbing, it almost makes you glad that they put Pickles in charge.
I agree with John Mathias and consider that opinion “dredging prevents floods” is wrong.
“The man responsible for the silliest comment made about river management in recent times was Owen Paterson last April. He told the South West Agricultural Conference that “The purpose of waterways is to get rid of water.” ” – Not really so silly if you read “waterways” to be “rivers” in the present context- you do not need a degree in geomorphology to know that the only way rivers are ever created is by the water from rainfall and springs finding its way to the sea. Maybe “get rid of” is a crude way to describe river flow – but that is the effect!
I can’t fail to agree that rivers have the effect of transporting water from land to sea; but the reductionist view that this is their sole “purpose” seems eminently silly, even in the context of recent floods. Aren’t they also sources of water for irrigation; habitats for fish, birds and animals; opportunities for leisure pursuits; part of our transport infrastructure; aesthetically pleasing; and no doubt many more “purposes” besides? We need to keep in mind the full range of roles that rivers play if we’re to avoid making bad policy.
I’ll happily concede that the main purpose of a storm drain is to get rid of water, but I’d hope that the Environment Secretary might appreciate that rivers are rather different.
Not sure where my last comment disappeared. Anyway, all those lovely “purposes” for rivers ( as opposed to canals) that Peter Jones listed, namely “sources of water for irrigation; habitats for fish, birds and animals; opportunities for leisure pursuits; part of our transport infrastructure; aesthetically pleasing;” are incidental (and frequently manmade) to the only fundamental reason (which can be anthropomorpized as “purpose”) that is always present for a river ( as opposed to a canal) – that is: carrying water downhill from the land to the sea. Mr Paterson was right.
Peter,
Having grown up on the Somerset levels and spent many a happy hour swimming in rivers and drainage channels and jumping rhynes I have to say there seems to be a fundamental lack of understanding by both politicians and many of the residents.
The levels are a flood plain and below sea level therefore they are going to flood. The rivers cannot drain into the sea if there is a tidal surge forcing water inland and the tidal rise and fall in the Bristol Channel is the second largest in the world . Much of the silt that those in favour of dredging want to relocate is soil washed off the land by surface water and accumulated by tributaries into the main rivers. Whilst dry summers and lush pastures may seem idilic to dairy farmers they are not the long term norm for such an area, the peat deposits bear witness to this and long term saturation. The soils are rich and alluvial yes but the farming methods practised have allowed soils to be washed from the land and into the water courses, hence the call for dredging. The environment agency have been pursuing a European directed programme of catchment area management for the last few years and this approach is ultimately the only way to manage an area such as the Somerset levels effectively on a long term basis. Large areas will have to be allowed to flood in order to protect populated areas, reforestation needs to be implemented on a large scale on the surrounding uplands, development needs to be stopped on the flood plain, sustainable urban drainage needs to be compulsory in urban areas. Trees need to be planted on the levels in order to combat the loss of soils and prevent silting up of water courses and the main crop needs to be timber and biomass with grazing of cattle only practised during the drier summer months. Swales and other landscape features need to be built to trap silt from run off and promote the build up of land. The clue is in the name Somerset – ‘summer land’ it was only traditionally productive land in the summer the rest of the time it was under water. We need to get away from the narrow parameters of so called traditional UK farming methods and start to think more creatively and in harmony with natural cycles. Who knows if climate change brings warmer temperatures the Somerset levels could become the Camargue of northern Europe and the principle crop could be red rice!
I agree with your statements regarding management of the entire catchment with regard to re-wilding to slow water and the creation of additional storage. I would like to add to this that something needs to be done regarding the currently uncontrolled urban run off that has been created by poor planning decisions and over development of marginal land within the catchment. This issue and the rectification of mistakes already made are being proposed as part of the new 20 year plan being drawn up by the County Council.
However, I must take exception to your assumption that most of the locals are ill informed. Many of the locals, especially those who are members of FLAG (Flooding on the Levels Action Group) are extremely well informed with regard to challenges of the landscape in which they work and live. We have made it our business to find out what the problems are and to back our protests with well researched, scientific fact. None of us are naïve enough to suggest that all flooding can be prevented but the severity and longevity of the flooding events of 2012/13 and 14 could have been mitigated by an integrated proactive management plan – something lacking since 1996 when the EA took over from the NRA. Of course pumping cannot take place on an incoming tide but the fact is that the rivers (or should I say engineered drainage channels) cannot currently do their job as they are currently at only 58% of their design capacity due to lack of maintenance.
With regard to the EU catchment directive, it is just that a directive not law – do you propose that most of the Netherlands be returned to marsh or surrendered to the sea? – I don’t see the Dutch implementing it!. It was not drawn up with Somerset in mind but mooted for natural flood plains – which the Levels are not. They are a man made landscape that has successfully been managed for over 700 years. No-one is suggesting that the levels should be completely drained either as this would cause land shrinkage and ruin the spectacular and unique habitat that is the Levels. Sadly the prolonged flooding has been devastating to the wildlife and ecologists and the RSPB alike have joined us in demanding joined up thinking and proper management of the landscape. Wading birds cannot wade in 6 feet of water, Barn owls are reduced to hanging our in gangs in the daylight on the fences of the civic amenity sites and the flooding has killed more badgers than the cull ever did.
The EA and RSPB policy has been to ban the planting of trees on the levels to prevent raptors and corvids from perching and preying on the species that they are trying to encourage was utter folly – it’s shame that people not being on their list of protected species!
Much of the silt that is clogging the pinch points on the lower Parrett actually comes upstream on incoming tides from the Bristol channel. Most of the Silt coming off land on the levels ends up in the rhynes (field ditches) and is put back on the land when these channels are cleared. The promised Parrett tidal barrage will address much of this issue and in combination with improved upstream management and dredging / maintenance of the tidal sections flooding can be brought under control once more.
We have no intention of farming capybara or growing rice but will continue to campaign for sustainable farming practices to be supported and encourage not banned by subsidy, policy or EU meddling.
As far as I am aware Somerset comes from the Anglo Saxon and refers to the fact that the Summer palace of the dark ages/ early medieval Kings of Wessex was at Somerton (Sommer Seat)- people used to like to come to Somerset on their holidays even then.
It seems to me that many of the people affected knew the Levels were reclaimed marshland and thought no more they just moved in.I am no hydrologist but it takes no expert to know that reclaimed marshland is always liable to flooding – raised river banks gives a clue too. The people moved in to their counrtyside idyl without even a basic thought. Even the searches on buying the properties did not concern them.
They move in and then complain when the inevitable happens and start shouting “They arenn’t doing anything” “they should have …..”
What about all the other areas that flooded in recent years Stourbridge, Hull to name two. Who helped them, who moved troops in?
It is an orchestrated opportunity to shout at government and agencies. Leave them alone and get on with self solving the problem YOU ignored.
I for one have heard enough, seen too many reporters standing in front of water in case i have no idea what a flood is!
Time for the relevant authorities to review in peace without the media baying for scalps and get on with life.
Peter
I find it hard to be a fan of the Agency – it’s always felt just too big and clumsy. But I’m even less of a fan of opportunist politicking which this bout of EA bashing surely is.
Am I the only person seeing the irony in climate-sceptic politicians attacking the EA. Aren’t the EA the government’s expert on the environment? Haven’t they been warning about the impact of climate change? Haven’t they been asking for more money to mitigate the effects of increasingly hostile weather patterns?
In his pretty impressive interview on Today last week, Lord Smith very politely pointed out that the EA were bound only to spend the meagre £400,000 per year that the EA has at their disposal for the levels, if they can demonstrate that every £1 spent brings £8 of benefit. Blame the weather; blame Treasury – but blaming the Agency is blatant scapegoating.