Landsat Data Help Water-Resource Managers

  • Released Friday, November 1, 2013
  • Updated Friday, October 2, 2015 at 3:43PM
  • ID: 30469

In the Western United States between 80 and 90% of freshwater is used for agriculture. In Southern California irrigated farmland stretches southward across the desert from the Salton Sea—an artificial inland sea—to the Mexico border. In the natural-color image [left] acquired on May 15, 2013, by Landsat 8’s Operational Land Imager, blocks of square farmland appear in shades of green and tan, while urban areas such as El Centro, California and Mexicali, Mexico appear in shades of gray. Accurate estimates of total crop area provided by Landsat satellites can be used to help forecast commodities in the United States and the world food market. On that same day, thermal measurements from Landsat 8’s Thermal Infrared Sensor [right] show different temperatures between crop fields as well as urban and desert areas. Cooler areas (e.g., irrigated crops) appear as dark purple and red shades, while warmer areas (e.g., urban and desert areas) appear as shades of bright yellow and white. Plants cool down when they transpire, so the combination of water evaporating from the plants and the ground (i.e., evapotranspiration) lowers the temperature of the irrigated land. Pixels representing cooler areas in thermal images from TIRS help water-resource managers determine where water is being used for irrigation, allowing them to make management decisions on water distribution to preserve this scarce resource. When an earlier design of Landsat 8 did not include a thermal infrared band, the Western States Water Council advocated for its inclusion.

Used in 2014 Calendar.


Please give credit for this item to:


This visualization is related to the following missions:


This visualization can be found in the following series:

Datasets used in this visualization

Landsat-8 (Collected with the TIRS sensor)
Observed Data
Landsat-8 True Color (A.K.A. Band Combination 2,3,4) (Collected with the OLI sensor)
Observed Data

Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.

You may also like...

Loading recommendations...