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Problem: Irrigation Efficiency

The vast quantities of water consumed in irrigation mean that any gains in efficiency can substantially decrease water usage. Worldwide, irrigation is an average of 37% efficient; the average in the United States, 50%, is not much better (Pimental, 1997; Postel, 1985, 11). Only about 5% of the irrigated lands in the U.S. use the most efficient irrigation methods available (USDA, 1998). If farmers across the country could raise total use efficiency to 90%, it would reduce the nation water demand by upwards of 15%.

Andy Wingo 2001-12-10