**About the Editors**

**Francisco Javier Alcal ´a** is Senior Researcher at the Geological Survey of Spain. His research interest deals with human and global interactions underlying problems of groundwater quantity and quality for strategies of diagnosis, operation, mitigation, and protection. Innovations deals with applications for groundwater recharge and chemical baseline evaluations at different spatiotemporal scales and climate scenarios. He has experience as Principal Investigator in National and International R&D projects. He is author of 49 high-impact SCI papers, and has significant activity as reviewer, editor, and representation in international committees and forums.

**David Pulido-Vel ´azquez** is Senior Researcher at the Geological Survey of Spain. His research focus on the development of methodologies and tools for integrated analysis of management alternatives in water scarcity systems within the Mediterranean area, with special emphasis on the study of impacts and adaptation strategies to global change. He has experience as Principal Investigator in National and European R&D projects. He is author of 47 high-impact SCI papers and has significant activity as reviewer and editor.

**Luis Ribeiro** was Full Professor of Groundwater Hydrology at the Instituto Superior Tecnico ´ from University of Lisbon. His research interests focused on groundwater numerical and stochastic models, groundwater and global change, groundwater dependent ecosystems, integrated management of water resources, and water in ancestral civilizations. Prof. Ribeiro passed away on 3 April 2020. Her devotion to groundwater research leaves a legacy of multidisciplinary knowledge to the scientific community and to the public in general.
