M Thangarajan Editor

M. Thangarajan, formerly Scientist-G and head of the groundwater modeling group at the National Geophysical Research Institute (NGRI), Hyderabad, India, obtained his B.Sc. and M.Sc. in physics at Madras University, Tamil Nadu, India. He obtained his PhD in applied geophysics at the Indian School of Mines (ISM), Dhanbad. He has carried out research work in the assessment and management of groundwater resources through electric analog and mathematical modeling. He has published over 140 research papers. He is also the co-editor of five conference proceedings volumes, the author of two books on groundwater modeling, and the editor of a book on groundwater.

Vijay P. Singh is a distinguished professor and Caroline and William Lehrer distinguished chair in water engineering in the Department of Biological and Agricultural Engineering and the Zachry Department of civil engineering at Texas A& M University. He received his BS, MS, PhD, and DSc in engineering. He is a registered professional engineer, professional hydrologist, and an honorary diplomate of water resources engineering for the American Academy of Water Resources Engineers, ASCE. He has published more than 850 journal papers; 24 textbooks; 57 edited reference books, and 100 book chapters. He has received numerous honors and awards for his contributions to the field.