Dr. Gopal Krishan is currently Scientist-E, at National Institute of Hydrology, Roorkee and Ex-Researcher-Indo Gangetic Basin, Groundwater Resilience Project, British Geological Survey, United Kingdom. Dr. Gopal has over 20 years of research experience in many facets of hydrological evaluations, surface water and groundwater hydrology project management, and field investigations. Dr. Gopal has expertise in isotope hydrology, hydro-geochemistry and water quality studies and has supervised 2 awarded PhD thesis; 17 master dissertations; 1 CV Raman Fellow and 1 DAAD Fellow. Dr. Gopal has published more than 100 International Journal articles, > 15 book chapters, and edited 2 books. Dr. Gopal is a fellow member of Society of Earth Scientists (F/486), a Life member of “Indian Association of Hydrologists (IAH-1878); Association of Global Groundwater Scientists (LM-AGGS-133); International Association of Hydrological Sciences (IAHS – 17349); a member of Indian Society of Remote Sensing; American Water Resources Association (7624); international association of hydro-geologists (141319).