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Current Defra policy on river catchment management has been informed by our interdisciplinary research over a 10-year period, much of it addressing the challenges posed by the EU Water Framework Directive. Outcomes from our research are reflected in the policies proposed in the 2011 Water for Life White Paper and also in the multi-million pound investment plans of water companies. We have also influenced a whole-community framework for catchment management in the UK that was piloted in 2011 and has now been extended to 100 catchments across England.
Geography at Exeter has a well-established reputation for research on the effects of soil erosion and land management on soil quality, diffuse pollution, and on water quality in UK river systems. Since 2008, this research has been used to inform DEFRA policy, in relation to soils, water, and the DEFRA code of good agricultural practice. Dissemination of effective approaches to land management, most especially through the Catchment Sensitive Farming Initiative has resulted in clearly demonstrable changes in farming practice by landowners in several priority river catchments within the UK, demonstrating a positive change in behaviour and improved management of environmental risk. In addition, research on agricultural erosion has been used in the development of new agricultural policy practices in Canada.
Water is essential to society. The water industry constitutes a significant part of economic activity locally, nationally and internationally, and land and water management are crucial to environmental quality. Typically, water resources are governed by top-down, hierarchical approaches at state level. In contrast, the research of Professor Laurence Smith has demonstrated the success of approaches that privilege local stakeholder input and collaborative management at catchment level. Research outputs have contributed to improved and reformed water management in the UK and internationally, evidenced by their adoption by local authorities, NGOs, Defra and others, and promotion in the guidance proffered by organisations including Defra and the OECD.
New characterisation tools for natural organic matter (NOM) in drinking water are now used as standard practice within water companies such as Severn Trent Water, United Utilities and Yorkshire Water. The tools inform decisions, and help develop strategic plans on catchment management, source selection, treatment optimisation, and disinfection practice. Water companies experienced difficulties in treating high levels of NOM. Cranfield created a novel characterisation toolkit to measure NOM for its electrical charge and hydrophobicity. Also, new techniques for measuring aggregate properties and emerging disinfection by-products have provided a comprehensive analysis. Two novel treatment technologies are currently marketed. These technologies have raised international interest, resulting in industrial development in Australia.
By modelling the formation of micro-bubbles and the flows induced by them, researchers at the University of Cambridge Department of Applied Mathematics and Theoretical Physics developed a new, low-cost nozzle design that could be retrofitted to existing Dissolved Air Flotation (DAF) systems. This new design dramatically improved the performance of DAF systems, used by the water industry for the production of drinking water. Specifically, this research has enabled a substantial increase in throughput and effectiveness of the flotation process, whilst simultaneously providing a dramatic decrease in the energy requirement.
The virtual water concept is used to identify and quantify water use which is hidden, or embedded within the production and supply of food and other commodities. Its primary application has been to demonstrate that the majority of water consumed globally is used within the production and trade of food. Introduced and developed by Allan, virtual water research has transformed public and private sector water policy and its metrics in the UK and internationally. Instantiated through conceptual work published in 1993 and 1994 and developed through empirical studies thereafter, virtual water was widely adopted by 2000. The idea is now accepted as an essential element in the framing of policy on water security and its economic systems. Virtual water has been increasingly deployed by advisers to governments, corporations and NGOs, below we provide evidence from the U.S. State department, Coca Cola, WWF and the World Economic Forum, this is by no means a complete list. In 2011 the UK House of Lords and UK government's official response urged the EU Commission to incorporate virtual water in EU Policy. In recognition of the global conceptual impact of virtual water, Tony Allan was awarded the Stockholm Water Prize, 2008. In 2013, in recognition of impact made in preceding years through his virtual water concept and research Allan was also awarded the Foundation Prince Albert II de Monaco Water Award and the International Environmentalist Award of the Florence-based Fondazione Parchi Monumentali Bardini e Peyron.
The project combined stakeholder knowledge with natural science to identify future scenarios and adaptation options for uplands. Research into upland ecosystem services identified win-win scenarios (e.g. around carbon management) and important trade-offs (e.g. effects on biodiversity). These were embedded within government policy reports leading to additional work in government departments seeking to overcome policy barriers in these areas in order to implement the recommendations from the research. Overcoming these policy barriers has influenced government's decision to work in partnership to launch a new peatland carbon code, focussing on upland peatlands, creating corporate social responsibility (CSR) options for companies via peatland protection and restoration.
Under future climates, wildfire will exacerbate threats to water security. Our research demonstrates that burning of surface vegetation can invigorate hillslope hydrological response with marked increases in sediment and nutrient delivery to river networks and reservoirs. Negative water quality effects include high turbidity, toxic algal blooms and fish kills with implications for water supply at critical times in the water year. Through quantifying post-fire runoff and nutrient yield processes, the research has informed (i) catchment management decisions, policies and water resource risk assessment in Australia and (ii) water industry resource protection plans in the UK.
Research undertaken at the University of Manchester (UoM) has described peatland erosion and its impacts on hydrology and carbon balance; demonstrating the value of large scale peatland restoration via the re-vegetation of bare peat and erosion gully blocking. The primary impact can be seen within the Peak District National Park, where findings have formed the scientific underpinning for extensive investment in landscape-scale peatland restoration (totalling > £13m) by restoration practitioners such as the Moors for the Future Partnership (MFFP), which is significantly transforming degraded but iconic peatland landscapes. The MFFP mode is viewed as a national exemplar, with UoM research continuing to impact on upland policy, land use and restoration planning by regional, national and international bodies (National Trust, Moors for the Future, Natural England, DEFRA and the International Union for Conservation of Nature).
Diarrhoeal disease is the world's second most common cause of death in children under five years old, killing 760,000 children each year according to the World Health Organisation (WHO). Microbial contamination of drinking water is one of the most important causes. In England and Wales acute diarrhoeal disease is estimated to cost the country £1.5 billion annually. UEA epidemiologists have shown the important role of water supply systems in spreading diarrhoeal disease in developed and developing countries; led WHO research projects on small scale drinking water systems; and influenced WHO policy on small scale drinking water systems in developed and developing countries. Methodological research on epidemiological methods for monitoring and regulating bathing water quality has led to changes in WHO guidance on bathing water quality standards and influenced US Environmental Protection Agency criteria. Hunter's participation in international expert panels facilitated the impact of this research on policy.