Efficient irrigation (as a percent of total irrigated acres), by system type, for the 17 western States, 1994-2008

Percent

Stacked Bar chart with 4 groups and 3 items per group.

Group 1, 1994, Total value of 99.
Item 1, Traditional Irrigated Acres value of 63 which is 63.6% of 1994.
Item 2, Efficient Sprinkler & Drip/Trickle Irrigated Acres value of 15 which is 15.2% of 1994.
Item 3, Efficient Gravity Irrigated Acres value of 21 which is 21.2% of 1994.
Group 2, 1998, Total value of 100.
Item 1, Traditional Irrigated Acres value of 52 which is 52.0% of 1998.
Item 2, Efficient Sprinkler & Drip/Trickle Irrigated Acres value of 23 which is 23.0% of 1998.
Item 3, Efficient Gravity Irrigated Acres value of 25 which is 25.0% of 1998.
Group 3, 2003, Total value of 100.
Item 1, Traditional Irrigated Acres value of 56 which is 56.0% of 2003.
Item 2, Efficient Sprinkler & Drip/Trickle Irrigated Acres value of 27 which is 27.0% of 2003.
Item 3, Efficient Gravity Irrigated Acres value of 17 which is 17.0% of 2003.
Group 4, 2008, Total value of 100.
Item 1, Traditional Irrigated Acres value of 52 which is 52.0% of 2008.
Item 2, Efficient Sprinkler & Drip/Trickle Irrigated Acres value of 34 which is 34.0% of 2008.
Item 3, Efficient Gravity Irrigated Acres value of 14 which is 14.0% of 2008.

More efficient gravity irrigation includes furrow irrigated acres using above- or below-ground pipe, or a lined open-ditch field water-delivery system, plus acres in flood irrigation (between borders or within basins) on farms using laser-leveling and pipe or lined open-ditch field water-delivery systems. More efficient pressure-sprinkler irrigation includes acres irrigated using either drip/trickle systems or lower-pressure sprinkler systems [pressure per square-inch (PSI)< 30]. Traditional irrigation includes systems other than those defined above for more-efficient gravity/sprinkler irrigation (largely including high-pressure sprinkler and unlined furrow and flood systems without field borders).
Source: Computed by USDA's Economic Research Service using data from the Farm & Ranch Irrigation Surveys (1994-2008), National Agricultural Statistics Service, USDA.