Skip to main content

Centre-Pivot Irrigation in Kansas

Credits
USGS; Link: http://earthexplorer.usgs.gov/

Approximately 80 per cent of the global water consumption can be ascribed to irrigation farming. In this false-colour image from above Kansas, red stands for healthy vegetation while farmland sticks out due to its conventional and circular irrigation. The so-called centre-pivot irrigation is common in dry areas with a large land-use management. Its characteristic shape is clearly visible from space.

 

Location: Kansas, USA
Picture taken on September 26, 2010
Sensor: Terra ASTER
Band combination: Vis/NIR

Sand Dunes, Idaho

Credits
NASA (Jesse Allen, Robert Simmon); Link: http://earthobservatory.nasa.gov

Along highway 20 from Idaho Falls heading toward Yellowstone National Park, green and golden fields dominate the fertile plain of the Snake River. The circular areas indicate extensively irrigated farmland. The white dunes developed towards the end of the last ice age approximately 10 000 years ago when the global climate started to become warmer and drier. Lakes and rivers dried up leaving fine sand behind. Continuous winds from the south west blew the sand in northeasterly direction, passing lava fields which are quite dark in the picture.

 

Irrigation Farming in Iran

Credits
NASA (Jesse Allen, Robert Simmon); Link: http://earthobservatory.nasa.gov

The city of Gandoman is located south of Isfahan in the arid area of mountainous Iran. At the foot of the mountain, there is a lot of irrigation farming alongside a river in the flat plains. Green areas are covered with vegetation, and shades of earthly brown indicate uncultivated land. The dark brown triangle in the middle of the picture signals wetland. The fan-shaped structure of the cultivated land spreading out at the bottom of the steep hills on fertile alluvial fans clearly sticks out