Chapter 15. Aloys Michel. 1972. The impact of modern irrigation technology in the Indus and Helmand basins of Southwest Asia. Pages 257-275.

Keywords: India, irrigation system development, Indus River, Pakistan, waterlogging, salinity, Helmand Valley Afghanistan, increase in both area and time the availability of water to the soil and potentially to any groundwater reservoir, spread a given volume of water over more of the soil surface (command area), the lengthen the time which this volume spends in contact with the soil surface, storage dams, evaporation, aquatic weeds, microclimatic effects