Cal-SIMETAW Unit Values
_Cal-SIMETAW Unit Values_ dataset contains cumulative monthly unit values (per acre) of crop evapotranspiration (ETc), applied water (AW), and six other parameters for the period 2000 – 2015. Monthly unit values are reported for 20 crops and four non-agricultural land use categories in each Detailed Analysis Unit by County (DAUCo) in California. ETc reflects a well-watered, non-stressed plant condition, and is calculated as the product of reference evapotranspiration (ETo) and the crop coefficient (Kc). Computed ETc is sensitive to assumptions about Kc and growth dates. Those assumptions can be reviewed in the LUCI files for each DAUCo. **Suggested Application**: Unit values from the overlying DAUCo can be multiplied by land use acreages to compute total ETc or AW for a given study area, which can be used in a water budget or other planning analysis.
Data files
| Data title and description | Access data | File details | Last updated |
|---|---|---|---|
Cal-Simetaw Unit Et Values Cumulative monthly unit values (per acre) of crop evapotranspiration (ETc), applied water (AW), and six other parameters for the period 2000 – 2015. Monthly unit values are reported for 20 crops and 4 non-agricultural land use types in each Detailed Analysis Unit by County (DAUCo) in California (https://gis.water.ca.gov/app/boundaries/). Due to the large number of records in the this CSV file, a text editor is necessary to split the file prior to opening in Excel (max rows: 1,048,576): Row 1,048,576: 12/1/2004 164_06 Colusa Glenn-Knights Landing Onions & Garlic Row 2,097,152: 4/1/2015 303_15 Kern Indian Wells Alfalfa | Download | CSV | 08/11/23 |
Cal-SIMETAW input (LUCI) file for each DAU/County, zipped by DWR Region Office _LUCI_ files contain crop information used in Cal-SIMETAW computations, including growth dates, crop coefficients (Kc), irrigation information, root depths, and ground shading. Assigned values are from published information adjusted with input from farm advisors, farmers, and DWR region office staff. DWR welcomes local input to improve growth dates and crop coefficients. __Contact:__ [Morteza.Orang@water.ca.gov](mailto:Morteza.Orang@water.ca.gov) | Download | ZIP | 08/11/23 |
Supporting files
| Data title and description | Access data | File details | Last updated |
|---|---|---|---|
Readme file: Cal-SIMETAW Unit Values This Readme file contains basic documentation for the Cal-SIMETAW Unit Values dataset, including a description of the data and a key to input and output files. | Download | PDF | 08/11/23 |
Website Agricultural Water Use Models Website | Download | 08/11/23 |