Almost 40 years ago, Revelle and Lakshminarayana (1975) coined the term “Ganges Water Machine” trying to find a solution to the fundamental problem of land and water development in the Ganges, where 80% of the monsoon-driven river flow occurs during 4 months from July to October. The dry-season flow of the Ganges in the 1970s was already barely sufficient for irrigation needs of India and Bangladesh, ...