none 10.1144/qjegh2016-058 Geological Society of London Geological Society of London 1881 90132045 67378 2024072405143900244 10.1144 2024-07-24T10:01:28Z 2017-05-11T20:30:31Z 43 Quarterly Journal of Engineering Geology and Hydrogeology QJEGH 1470-9236 2041-4803 05 18 2017 05 2017 50 2 G. J. Farr British Geological Survey, Cardiff University, Park Place, CF10 3AT A. M. Patton British Geological Survey, Cardiff University, Park Place, CF10 3AT https://orcid.org/0000-0002-0581-9627 D. P. Boon British Geological Survey, Cardiff University, Park Place, CF10 3AT https://orcid.org/0000-0003-4921-8249 D. R. James Cardiff Harbour Authority, Queen Alexandra House, Cargo Road, Cardiff Bay, CF10 4LY B. Williams Cardiff Harbour Authority, Queen Alexandra House, Cargo Road, Cardiff Bay, CF10 4LY D. I. Schofield British Geological Survey, Lyell Centre, Research Avenue South, Edinburgh, EH14 4AP Low-enthalpy ground source heating systems can help to reduce our dependence on fossil fuels, in turn reducing greenhouse gas emissions and increasing energy security. To de-risk and support the sustainable development, regulation and management of ground source heating systems in urban areas, detailed baseline mapping of groundwater temperatures is required. Groundwater temperatures were measured in 168 monitoring boreholes primarily within a Quaternary sand and gravel aquifer in the city of Cardiff, UK. The data have been used to create the first city-wide map of shallow groundwater temperatures in the UK. This map can be used both to support development of ground source heating and to act as a detailed baseline from which to measure change. Shallow groundwater temperatures under the city were found to be 2°C warmer than the UK average groundwater temperature and this additional heat is attributed to the urban heat island. The zone of seasonal fluctuation varies from 7.1 and 15.5 m below ground level (mbgl) within the shallow Quaternary aquifer, averaging 9.5 mbgl. Deeper groundwater temperature profiles incorporating both the Quaternary and bedrock aquifers suggest that a ‘zone of anthropogenic influence’ exists down to about 70 mbgl. 05 11 2017 05 2017 187 198 10.1144/qjegh2016-058 1 10.1144/crossmark-policy www.lyellcollection.org true 2016-07-01 2017-03-10 2017-03-10 2017-05-11 https://doi.org/10.15223/policy-002 10.1144/qjegh2016-058 https://www.lyellcollection.org/doi/10.1144/qjegh2016-058 https://www.lyellcollection.org/doi/pdf/10.1144/qjegh2016-058 https://geoscienceworld.org/qjegh/article-lookup?doi=10.1144/qjegh2016-058 10.1016/S0375-6505(03)00063-4 10.1111/j.1745-6584.2005.00052.x 10.1002/9781444302677 10.1144/1470-9236/08-024 10.1021/acs.est.5b03672 10.1144/1470-9236/10-049 The Future of Heating: Meeting the Challenge DECC 2013 DECC 2013. The Future of Heating: Meeting the Challenge. Department of Energy and Climate Change, London. 10.1144/GSL.QJEGH.1997.030.P1.05 10.1016/j.jhydrol.2013.08.002 Cave and Karst Science Transactions of the British Cave Research Association Farr G. 5 40 2013 The hydrogeology and hydrochemistry of the thermal waters at Taffs Well, South Wales, UK Farr, G. & Bottrell, S. 2013 The hydrogeology and hydrochemistry of the thermal waters at Taffs Well, South Wales, UK. Cave and Karst Science Transactions of the British Cave Research Association, 40, 5–12. 10.1029/2007GL032324 10.1144/1470-9236/08-087 10.1016/j.scitotenv.2008.07.012 10.1144/1470-9236/08-073 Groundwater in the Urban Environment. Proceedings of the XXVII IAH Congress on Groundwater in the Urban Environment, Nottingham, UK, 21–27 September 1997 Heathcote J.A. 597 1997 Heathcote, J.A. & Crompton, D.M. 1997. Managing the impact of urban groundwater rise. In: Chilton, J. (ed.) Groundwater in the Urban Environment. Proceedings of the XXVII IAH Congress on Groundwater in the Urban Environment, Nottingham, UK, 21–27 September 1997, A.A. Balkema, Rotterdam, Netherlands, 597–602. 10.1144/GSL.QJEGH.1997.030.P1.06 10.1144/1470-9236/2002-29 10.1680/wame.2002.154.2.117 10.1016/j.scitotenv.2012.10.043 ONS 2012. 2011 Census. Office for National Statistics. http://www.ons.gov.uk/ons/publications/re-reference-tables.html?edition = tcm%3A77-294277. [last accessed 10 July 2014]. 10.1029/WR006i006p01701 Urban Geology in Wales Sutton J.S. 2004 Sutton, J.S., Coulton, R. & Williams, B. 2004. Hydrogeology and groundwater control, Cardiff Bay Barrage. In: Nichol, D., Bassett, M.G & Deisler, V.K. (eds) Urban Geology in Wales. Geological Series No. 23, National Museum and Galleries of Wales, Cardiff. 10.1016/j.jhydrol.2009.07.009 Proceedings of the Institution of Civil Engineers Williams B. 313 161 2008 Cardiff Bay Barrage: management of groundwater issues. Water management Williams, B. 2008. Cardiff Bay Barrage: management of groundwater issues. Water management. Proceedings of the Institution of Civil Engineers, 161, 313–321.