The Groundwater Drought Initiative (GDI)

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Groundwater provides a significant proportion of water supplies in the UK and the majority of our domestic water in many parts of southern, south-eastern and eastern England. It is an important source for agricultural irrigation and for industry in the UK. It supports flow in many of the UKs most iconic rivers, such as the Chalk streams of the Chilterns and the North and South Downs, maintaining healthy ecosystems, and providing amenity value and supporting livelihoods associated with those groundwater-dependent rivers. When managed appropriately, it is a dependable, resilient source of water. However, due to natural year-on-year variations in rainfall, it is susceptible to major droughts. For example, during the last major groundwater drought in the UK in 2010-12 seven water companies in south and east England had to impose temporary use bans (colloquially known as 'hosepipe bans') on about 20 million people in spring of 2012 with the environment and farming sectors also significantly adversely affected by restrictions on their use of water. Consequently, there is a need for a much better understanding of groundwater droughts and their impacts to support improvement in planning for and managing groundwater droughts in the UK. Groundwater droughts are defined as below normal levels of groundwater and have a number of unwelcome effects, such as reduced production of groundwater from boreholes, and the drying up of groundwater-dependent rivers with resulting implications for wildlife and livelihoods. The Natural Environment Research Council is currently funding the 'UK Droughts and Water Scarcity Programme' providing strategically important research to improve characterisation and prediction of episodes of drought in the UK. However, major episodes of drought take time to develop and affect large areas. For example, when there is a long groundwater drought in the UK, e.g. 2010-12, that same drought also affects large parts of continental Europe. As a result, there is significant benefit to be gained for the UK by understanding the development and impacts of major droughts at the European scale. However, there is currently no co-ordination of relevant groundwater information or groundwater drought research across Europe, and currently groundwater drought status cannot be monitored or its impacts assessed at the continental scale. This project, the Groundwater Drought Initiative (GDI), aims to address these shortcomings leading to significant improvements in groundwater drought characterization and impact assessment for the UK and continental Europe. The GDI will build on and add value to two existing NERC-funded projects (the Historic Droughts and IMPETUS projects) in the current NERC UK Droughts and Water Scarcity Programme and will work with partners from BOKU, Austria; University of Rouen, France; University of Freiburg, Germany; University of Oslo, Norway; Wageningen University, Netherlands; Comenius University, Slovakia; and, CISC, Spain as well as other researchers across Europe. The GDI will produce and publish the first pan-European assessment of groundwater drought status (from 1960 to present), and will analyse the most recent European groundwater droughts. The GDI will investigate what groundwater droughts mean for people - for the first time systematically investigating the impacts of recent groundwater droughts by comparing the results of the new European-scale groundwater drought status assessments with information about impacts of previous recent droughts held in an existing on-line database (the European Drought Impact Report Inventory, EDII). Central to all the activities of the GDI will be the establishment of a new network to co-ordinate the work of groundwater drought specialists and related data and information across Europe, ensuring the dissemination, use and maintenance of the common resources to enable future impactful research into groundwater droughts.