Prashant K. Srivastava obtained his PhD from the Department of Civil Engineering at the University of Bristol in Bristol, UK, and currently serves on the faculty at the Institute of Environment and Sustainable Development at Banaras Hindu University in Varanasi, India. He formerly worked in the Hydrological Sciences Department at the NASA Goddard Space Flight Center and is currently an investigator for several national and international projects. He has published 100+ papers, many books, and several book chapters. He is also acting as an editorial board member of several reputed journals. Dr. George P. Petropoulos is Assistant Professor in Geoinformatics at the Department of Geography, Harokopio University of Athens Greece. His research focuses on the exploitation of geoinformation technology & geospatial data analysis techniques in geographical and environmental applications. He is author/co-author of over 110 articles, 40 book chapters, and has edited 6 books. He has developed collaborations with key scientists in his area of specialisation globally and his research & teaching work has received international recognition via several significant awards and research funding.