Charles C. Mann Quote
Agricultural losses are costly to prevent. Most irrigation is deployed through canals. They lose water because it seeps through the bottom, evaporates during transmission, and spills out at junctions; a rule of thumb is that almost two-thirds of the water is lost, and often much more. (The figures are imprecise, because some of the lost water flows usefully into neighboring fields or percolates back into rivers.)
Charles C. Mann
Agricultural losses are costly to prevent. Most irrigation is deployed through canals. They lose water because it seeps through the bottom, evaporates during transmission, and spills out at junctions; a rule of thumb is that almost two-thirds of the water is lost, and often much more. (The figures are imprecise, because some of the lost water flows usefully into neighboring fields or percolates back into rivers.)