AgLine’s crop water use data is derived from the California Irrigation Management Information System (CIMIS) station located in Parlier. The CIMIS station provides “reference Evapotranspiration” (ETo) with grass as the reference crop.

Given the weather conditions, Grass Reference ETo approximates the amount of water used by healthy, well-maintained grass.

Each week, the Grass Reference ETo data is downloaded and entered below:

Grass Reference ETo

Report Date	Last 7 Days	Next 7 Days	Season to Date
	(inches per day)	(inches per day)	(inches)	Variance from Normal
11/22/2024	0.07	0.06	56.16	100.00%
11/15/2024	0.08	0.07	55.65	84.56%
11/8/2024	0.08	0.07	55.1	53.25%
11/1/2024	0.09	0.08	54.51	36.65%

The water use for each crop (ETc) is calculated by multiplying the ETo by the crop coefficient (Kc) according to the following formula:

ETc = ETo*Kc

Kc values are factors that correlate the ETo to each crop. Kc varies by crop type, time of year, and cultural practices. Values used by AgLine have been adjusted to match crop water use and grower practices in the Kings River service area.

For more information about crop curves or how reference evapotranspiration is obtained, please visit the CIMIS website at www.cimis.water.ca.gov.