OpenET


Meeting Utah’s water consumption data needs while improving transparency and confidence



OpenET, a consortium of experts in remote sensing of evapotranspiration (ET), cloud computing, water policy, and water markets, is supporting measurement of consumptive water use from field to basin scale within the Colorado River system in Utah. OpenET has developed a platform for public, transparent, and reproducible measurement and reporting of ET (also referred to as depletion or consumptive water use in agriculture) using remote sensing. Remote sensing uses satellite imagery of the entire surface area of a landscape, enabling consistent analysis of the Colorado River system and aligning the Authority with interstate water management efforts.




Project tasks advance science and application


OpenET will provide the Authority:
  • User-focused administrative support through training, review of reports reliant upon OpenET data, data services, and access,
  • Data improvement through historic data production (1991-2023), crop type and land use updates, and consumptive use accounting for effective precipitation, and
  • Data comparison through correlation of historic OpenET data to crop coefficient methods.

Together, these efforts will provide a longer and higher frequency dataset than is currently publicly available and will streamline the process for incorporating effective precipitation for consumptive use determination, while improving the publicly available data. Ultimately, OpenET’s products will support the Authority’s objective of establishing confidence in remote sensing methods and their applications to drought mitigation planning, implementation, and verification.


Image



Image


Ground-truthing data through partnership with Utah Geological Survey

Remote sensing of consumptive water use is a relatively new method and requires ground-truthing and continued verification research. Therefore, OpenET data will be intercompared with Utah Geological Survey’s Utah Flux Network eddy covariance station data through collaboration between each team and coordination by the Authority.



OpenET Historical Dataset & Report


In 2024, OpenET completed production of the 1991-2023 Historical Dataset for the Colorado River system in Utah complemented by a Report on the dataset. The Historical Dataset Report includes:

  • An overview of the OpenET modeling system,
  • A review of differences between the OpenET ensemble and eeMETRIC,
  • Identification of geographic anomalies or temporal discontinuities in historic ET data, and
  • Discussion of limitations and considerations when using OpenET evapotranspiration (ET) data from any model.

Intercomparison of the historical OpenET dataset and other ET products is ongoing, and applications for the historical dataset are in development by the Authority. Additional publications about OpenET, and publicly available data can be found on OpenET’s website linked below.




Primary Contributors


Supporting Contributors



Contact

Lily Bosworth | (801) 824-9037 | [email protected]