**About the Editors**

#### **Elisabetta Preziosi**

Elisabetta Preziosi is a researcher at the Water Research Institute of the National Research Council of Italy with long-term experience in groundwater resources management. With a Master in Geology (1989) and Ph.D. in hydrogeology (1997) at the University Sapienza of Rome (Italy), she spent two years at the Ecole des Mines of Paris (ENSMP) in Fontainebleau (France) as a post-doctoral fellow (1994–1995) and as a researcher (1997–1998). Currently, she holds a class on groundwater monitoring at the Sapienza University of Rome. She has authored or co-authored more than 30 papers published in international ISI journals, as well as book chapters, and she is an Associate Editor of the ISI journal "*Acque Sotterranee - Italian Journal of Groundwater*". Her research interests include water–rock interactions and natural background levels; the effects of climate changes on the hydrologic cycle; groundwater flow modeling at the regional scale; sustainable water resources management; water scarcity and drought issues; and EU Groundwater Directive implementation.

#### **Marco Rotiroti**

Marco Rotiroti is an Assistant Professor at the University of Milano-Bicocca, Department of Earth and Environmental Sciences. His research interests include hydrogeology and hydrogeochemistry, aiming to support the sustainable management of the quantity and quality of groundwater resources. His research activities focus on the geochemical evolution of groundwater along flow paths, groundwater pollution by nitrate and arsenic, natural background levels, contaminated sites, groundwater/surface–water interactions, groundwater dating, the impacts of climate change on groundwater resources, groundwater flow and reactive transport modeling.

#### **M. Teresa Condesso de Melo**

M. Teresa Condesso de Melo is a Hydrogeologist with an MSc Degree in Groundwater Hydrology (UPC Barcelona, Spain) and a PhD in Hydrogeology (UA Aveiro, Portugal), with a 3-year doctoral research training with the Hydrogeology Group (Wallingford, UK) of the British Geological Survey. She is a senior lecturer and co-coordinator of the Erasmus Mundus Joint Master Degree Programme on Groundwater and Global Change - Impacts and Adaptation (GroundwatCh) at Instituto Superior Tecnico (ULisboa). She has more than 25 years of international professional ´ experience in hydrogeology, groundwater quality and tracers, hydrogeophysics, groundwater monitoring and modelling. She has participated in several EU funded projects—PALAEAUX, BASELINE and BRIDGE—which were important supports for the implementation of EU Water Framework Directive (WFD) and Groundwater Directive (GWD).

#### **Klaus Hinsby**

Klaus Hinsby has been a Sr. Research Hydrogeologist at GEUS, the Geological Survey of Denmark and Greenland, since 1988. He is the chair of the Water Resources Expert Group of the EuroGeoSurveys and the Danish chapter of the International Association of Hydrogeologists. His research activities and interests include: 1) the derivation of natural backgrounds and threshold values for groundwater; 2) climate change impacts on groundwater quantity and quality, including sea-level rise and seawater intrusion; 3) groundwater age distributions and contaminant trends; and 4) the science–policy interface, e.g., in relation to EU directives and the UN sustainable development goals. He has more than 100 publications including 40 peer-reviewed journal papers and 14 book chapters.
