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Posts tagged Center-pivot irrigation

Desert Agriculture in Saudi Arabia

29.9N 38.3E

June 4th, 2012 Category: Snapshots

Saudi Arabia - June 1st, 2012

A great number of circular green and brown fields contrast with the surrounding orange and tan desert sands of arid Saudi Arabia. This agricultural technique is known as Center Pivot Irrigation – water from deep underground is pumped to the surface and distributed via large center pivot irrigation feeds.

These circular fields range from a few hundred meters in diameter to as much as 3 km (2 miles) across. Although the fields may appear to be dotted randomly across the landscape, they actually are planned by engineers who follow ancient river channels now buried by the desert sand.

Haruj Volcanic Field and Desert Agriculture in Libya – February 3rd, 2012

27.4N 20.0E

February 3rd, 2012 Category: Deserts, Image of the day, Volcanoes

Libya - December 30th, 2011

Close-up of agriculture

The large, dark brown area in the Libyan Desert on the left side of the main image is the Haruj, a large volcanic field. It spreads across 45,000 km2 (17,000 sq mi) in central Libya, and contains about 150 volcanoes, including numerous basaltic scoria cones and about 30 small shield volcanoes, along with craters and lava flows.

Near the right edge of the main image, and visible at a greater magnification in the close-up, is desert agriculture. These fields appear circular due to center-pivot irrigation (sometimes called central pivot irrigation or circle irrigation), a method of crop irrigation in which equipment rotates around a pivot, creating a circular pattern in crops when viewed from above.

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