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  • Presentation | H41D: Evapotranspiration (ET): Advances in In Situ ET Measurements and Remote Sensing-Based ET Estimation, Mapping, and Evaluation II Oral
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  • H41D-01: Field-scale Evapotranspiration (ET) patterns driven by land use changes in California’s Imperial Valley
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Author(s):
Miguel Bribiesca Rodriguez, University of California Los Angeles (First Author)
Mekonnen Gebremichael, University of California (Presenting Author)


California’s Imperial Valley is a major agricultural region in one of the driest parts of the United States. Because the area receives so little rain, nearly all crops depend on irrigation, making water use a critical issue. This study looks at how growing different crops over time (especially switching into or out of alfalfa) affects water use in farm fields. Using satellite data and public land use maps, we analyzed how much water plants used on over 23,000 fields from 2008 to 2015.


We found that fields growing alfalfa year after year used the most water, especially in the summer. On the other hand, fields that stopped growing alfalfa used much less water overall. These results help us better understand how farming decisions impact water demand. This kind of information can support smarter irrigation planning and more sustainable water use in dry regions.




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