:: ITRC Projects ::
California Crop and Soil Evapotranspiration
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Highlights
The purpose of this study was to create a publication presenting evapotranspiration for crops and soils in 13 California Dept. of Water Resources (DWR) Reference Evaporation Zones (ETo Zones) for three types of precipitation years:
- typical
- wet
- dry
For persons interested in irrigation scheduling and design, the publication includes instructions on how to adjust ET values for:
- different irrigation systems
- different growing seasons
It also includes instructions, for persons doing regional or irrigation district water balances, on how to adjust values for:
- bare spots and decreased plant vigor
- multiple crops on the same field
One of the main purposes of this project was to provide California water users with crop/soil ET values that take into account regional environmental and management differences. Furthermore, with the ETo and crop/soil ET information presented in each table, crop coefficients can be calculated with relative ease for regions throughout the state.
The resultant publication, ITRC Report No. 03-001, contains the most comprehensive crop/soil ET values available to date for California. The data can also be accessed on the ITRC website's Online Evapotranspiration Data section.
