Lars Bengtsson is professor in Water Resources Engineering at Lund University, Sweden. He was previously professor of hydrology at Uppsala University and Luleå Technical University and visiting professor in the USA, Canada and Hungary. He is and has been editorial board member of a large number of scientific journals. He has published more that 100 papers in international peer-reviewed journals. He specializes in physical processes in lakes and rivers and cold climate hydrology.
Reginald Walter Herschy is a British consultant in hydrology dealing mainly with rivers, lakes and reservoirs. His work has taken him to Ireland, China, India, South Africa, Lesotho, Kenya, USA, Canada and South America. Dr Herschy was formerly with the UK Government for many years as head of hydrometry in England and Wales. He is the author of some 60 technical papers on hydrology and meteorological satellites and author of several books. He is co-editor with the late Professor Rhodes Fairbridge of the Encyclopedia of Hydrology and Water Resources.