Living with Environmental Change(LWEC), a consortium of 22 organisations that fund, carry out and use environmental research and observations, has launched a new strategy to drive collaborative research into how to manage the risks to life and property posed by flooding and coastal erosion in the UK. Across the country, it is estimated that 6 million properties are at risk from all sources of flooding or from coastal erosion; this number is only likely to increase due to climate change and extreme weather events. The LWEC ‘UK Flood and Coastal Erosion Risk Management Research Strategy’ marks, as stated by the document, ‘a major shift’ in the UK’s approach to tackling this significant economic, social and environmental issue.

Research priorities are grouped under three themes within the document: ‘understanding risk’; ‘managing probability’; and ‘managing consequence’. To take the first: managers of risks from flooding and coastal erosion need to synthesise data from multiple sources and assess the quality of these data in order to make informed decisions. The development of decision-support tools will be necessary. Secondly, the management of engineered and natural flood and coastal defences (see the blog post on Natural Flood Management from earlier this week for a brief overview of natural flood defences and the potential issues in making greater use of these) can be improved by research. This is an area where a small amount of investment may yield dividends for the UK. Finally, raising awareness and understanding of flood risk in order to influence the behaviour of individuals and communities in response to flooding and coastal erosion events is important, and an area where research into behaviour change can contribute. Also included within ‘managing consequence’ is the need for greater research so that forecasting and early-warning systems can be improved, alongside multi-agency emergency planning.

The LWEC strategy, it is anticipated, will lead to greater coordination of research effort amongst LWEC partners, whilst efforts will be made to translate the outputs of research into practice. LWEC will commission collaborative research projects, including at local scales, and will promote early collaboration between academics, industry researchers, service providers, the beneficiaries and end-users of research. Over the next 20 years (the timescale considered by the Strategy), the outcome should be the improved understanding and management of flood and coastal erosion risk for the benefit of millions of people.

More natural means of managing flooding are desirable and should be brought foward by the Government in a new White Paper on water. So commented Anne McIntosh MP, Chair of the Environment, Food and Rural Affairs (EFRA) Select Commmittee and of the All Party Group on Flood Protection, at a parliamentary event attended by the BES Policy Team yesterday evening. The well-attended meeting was organised by Oliver Pescott, the most recent BES-funded Fellow at the Parliamentary Office of Science and Technology (POST), to launch the POSTnote he authored on ‘Natural Flood Management’.

Natural flood management (NFM) is defined in the POSTnote as ‘the alteration, restoration or use of landscape features’. One of the four speakers, Dr Paul Quinn, Newcastle University, made it clear that NFM is not about taking a system back to a natural state but working with and engineering natural processes. Dr Quinn presented work in which he had been involved within the town of Belford, in which residents have faced six major flooding events within the course of seven years. During extreme events, huge amounts of rainfall can be observed running off farmland; this can be tackled effectively, Dr Quinn suggested, by ‘catchment systems engineering’, which seeks to ’slow, store and filter’ water. Farm tracks, specially engineered to store water behind them; dams which ‘leak’ slowly to control water flow; and the use of woody debris (’beaver dams’) to perform a similar function can all help to attenuate run-off.

Dr Wendy Kenyon, James Hutton Institute, highlighted the importance of working with land-managers if those wishing to control flooding wished to work with natural processes as stated. Dr Kenyon’s team have conducted a number of semi-structured interviews with farmers, revealing that first and foremost, farmers are concerned with the viability of their businesses. Dr Quinn had presented results showing that 10 – 20 storage ponds could make a significant difference to the peak water flow; Dr Kenyon argued that the presence of this number of ponds on agricultural land could begin to have a significant effect on the farmer’s bottom line and so the viability of this proposal would need to be considered carefully.

It is important to ensure too that farmers are able to access funding to support their efforts to implement NFM. Fifty eight percent of farmers questioned by Dr Kenyon said that they would be encouraged to introduce NFM measures if there was more funding available to do so and if it could be applied for easily. This is significant as under the Common Agricultural Policy, money is already available to support NFM but, according to Dr Kenyon, farmers have not been accessing this as a source of funds. We need, Dr Kenyon suggested, to work with farmers to find out why.

The issue of the scale at which experiments are undertaken and from which conclusions can be drawn is a highly significant one. It became clear through the presentations that there is a great deal of uncertainty concerning the robustness of conclusions which can be drawn about flood attenuation at the catchment-scale through NFM, based on small-scale experiments. Dr Neil McIntrye, Imperial College London, suggested that although strategic tree-planting can have an affect on ameliorating flooding at a local scale, this beneficial effect is likely to be marginal at regional to larger scales. The true benefits of such interventions are only likely to become apparent, Dr McIntyre suggested, once further research has been undertaken to understand catchment-scale interactions.

The case was therefore made for greater investment in field experiments and better modelling to understand the benefits of NFM. Anne McIntosh MP questioned why the science had not yet revealed these benefits, to which the scientists responded that the high cost of studying natural processes over time and the uncertainty created by extrapolating the results from one study site to another, where geomorphology and hydrology may be very different, constrain the ability to draw robust conclusions. Dr Quinn suggested that scientists would do best to measure at an appropriate scale and then build confidence in extrapolating conclusions, for example through better models.

Funding the necessary experiments and modelling approaches, alongside funding NFM interventions will be a challenge. Anne McIntosh suggested that there was little appetite in Government to pass the cost of NFM projects, including efforts to monitor the efficacy of these projects, onto the consumer through higher water bills. Ms McIntosh, and others, suggested that Payments for Ecosystem Services could be one mechanism of paying for NFM, although here the beneficiaries (presumably the consumers) would still need to pay for the NFM interventions implemented by land-managers (the providers of the ecosystem service of flood alleviation).

There should be scope to deliver NFM alongside other services as part of a framework of multi-functional land-use. Speakers did not touch on this to a great extent and it would have been interesting to have heard more from this perspective. Dr Quinn mentioned that buffer strips planted at the sides of agricultural land can slow the flow of run-off, indicating both a biodiversity and a NFM benefit. Dr Quinn also mentioned the need for multiple stakeholders to come together (eg as in Belford), including ecologists, land-managers and residents, to discuss and agree a shared vision for a catchment. South West Water is investing a great deal of money in NFM measures but for water quality reasons (eg reducing sediment load in the watercourse), with consequent benefits for river ecology. However, overall there was little discussion of the ecological benefits, or disbenefits, of NFM approaches.

In opening the meeting, Anne McIntosh informed attendees that in a meeting of the Liaison Committee (involving all Chairs of Parliamentary Select Committees), members had extracted from the Prime Minister an undertaking that a Water Bill would be published early in the next Parliamentary session. The BES will watch with interest to see whether NFM is incorporated into the Bill when drafted.

Applications for the next BES Fellowship at POST are now open and close on Thursday 5th April. If you are in the second or third year of your PhD in ecology at a UK institution, consider applying. Find out more from the BES website.

Oliver Pescott, current BES Fellow at the Parliamentary Office of Science and Technology, has published a POSTnote on ‘Natural Flood Management’. This will be available shortly on the BES website.

Flood risk management today uses a range of approaches to reduce risk, including structural works, such as hard flood defences, and non-structural approaches, such as improving flood warning systems and land-use planning. The restoration, alteration and use of natural landscape features are also receiving attention as potentially cost-effective ways of reducing flood risk that can provide other environmental benefits, such as water quality improvements or carbon storage.

The POSTnote will be launched formally in Parliament on Tuesday 17th January, from 4 – 6pm. The event will be chaired by Anne Macintosh MP, Chair of the All Party Parliamentary Group on Flood Protection and Environment, Food and Rural Affairs Select Committee. Presentations from a number of speakers will discuss key issues in Natural Flood Management:

– Martin Whiting, Chartered Institute of Water and Environmental Management, Rivers & Coastal Group Chair
- Dr Neil McIntyre, Reader in Surface Water Hydrology, Imperial College London
- Dr Paul Quinn, Senior Lecturer in Catchment Hydrology, Newcastle University
- Dr Wendy Kenyon, Senior Researcher, James Hutton Institute (Land and Natural Resource Use Research)

To register your interest in attending, please email postevents@parliament.uk or call 020 7219 8377.

The Queen’s Speech in Parliament today, in which she set out the legislative agenda for the Government, was just 7 minutes long. This is far shorter than normal, and reflects the fact that there is very little parliamentary time between now and the next election for the passage of new Bills.

The speech did however still contain some proposals of note from an ecological perspective. A proposed ‘Energy Bill’ would support the construction of up to four Carbon Capture & Storage (CCS) demonstration schemes to reduce emissions from coal power plants, whilst a ‘Flooding & Water Management Bill’ would require sustainable drainage systems to be considered for new building developments and give water companies more power to control customers’ water usage during droughts. The Government will also respond to proposals on high-speed rail between England and Scotland.

One draft environmental bill proposed in June has been dropped however- the Antarctica Bill. This would have implemented a new annex to the Environmental Protocol to the Antarctic Treaty, introducing a ‘polluter-pays mechanism’ to act as a deterrent to irresponsible operators in the region. It would also have established a liability regime for environmental emergencies.

It remains to be seen how many of the proposals retained in the speech actually make it into law. For a comprehensive list of all the Bills proposed by the Government, please see here.

Today (18th June) the UK Climate Projections 2009 report (UKCP09) was launched by Hilary Benn MP (Secretary of State for Environment, Food and Rural Affairs). The primarily Defra-funded report allows us to understand how the UK’s climate (temperature, rainfall, sea-level, humidity, cloud, and radiation), marine and coastal environments (sea level rise, storm surge, sea surface and sub-surface temperature, salinity, currents, and waves) will change during the 21st century. The Met Office, who led the study, has used the latest climate science to develop the projections, which also indicate the probability of any changes. The BBC reported the UK Met Office, as saying the UKCP09 is the “most comprehensive set of probabilistic climate projections at the regional scale compiled anywhere in the world”.

Results are provided for three different greenhouse gas emissions scenarios (high, medium and low) and for seven time periods up to 2099. The information will allow companies, local governments and Government bodies to plan for change and develop a resilient infrastructure.

The key findings from UKCP09 are as follows:
• All areas of the UK get warmer, and the warming is greater in summer than in winter.
• There is little change in the amount of precipitation (rain, hail, snow etc) that falls annually, but it is likely that more of it will fall in the winter, with drier summers, for much of the UK.
• Sea levels rise, and are greater in the south of the UK than the north.

Hilary Benn said “There is no doubt about it – climate change is the biggest challenge facing the world today. Climate change is already happening – the hottest ten years on record globally have all been since 1990. This landmark scientific evidence shows not only that we need to tackle the causes of climate change but also that we must deal with the consequences.”

See more on The Met Office website, Defra’s website and on the UK Climate Projections website.

A new report by the Centre for Ecology and Hydrology (CEH) confirms that the intense UK summer floods in 2007 were not due to climate change but were a ’singular event’. “The summer 2007 floods in England and Wales – a hydrological appraisal” systematically analyses the factors which led to the 2007 floods, an event on an unprecedented scale which cost the UK economy £3 billion.

Rainfall amounts and intensities overwhelmed urban drainage systems, with a dramatic increase in levels of run-off, due to rain falling on already saturated soil. Long-term rainfall and flow records do not however reveal any clear trend towards an increase in flooding magnitude in the UK, but instead mark this out as a singularity.

The floods of 2007 do reveal the UK’s vulnerability to climatic events; vulnerability which has increased markedly due to development on flood plains.