Satellite imaging to map groundwater use in California’s central valley: Satellite data reveal variability in intensity of groundwater use for different crops, a boon for irrigation policymaking across the state

ScienceDaily | Oct 1, 2020 at 8:02 PM
  • Their work could be revolutionary for managing groundwater use in agricultural regions around the world, as groundwater monitoring and management have been notoriously difficult to carry out due to lack of reliable data.
  • Over the study period, there was a median 272 millimeters (or 16 inches) of total cumulative subsidence for field crops (like corn and soy), and a dry water year subsidence rate of 131 millimeters (5 inches) per year.
  • For fruit and nut crops, (like almonds and grapes) there was a median 62 millimeters (2.5 inches) of total subsidence over the study period, and a dry water year subsidence rate of 31 millimeters (1 inch) per year.