Northern Sacramento Valley ET Report

Estimated Crop Evapotranspiration (ETc) for October 6 – 12, 2017

This report covers the CIMIS stations in Tehama County (Gerber South), Butte County (Biggs and Durham) and Colusa County (Williams). More information on using ET Reports is available here.

With the first rainfall forecasted for the end of next week, this will be the second to last report for the 2017 irrigation season. The final report will be posted next Friday, October 20.


	Tehama County - Gerber South
Crops	Past Week Water Use	Adjusted for System Efficiency			Accum’d Seasonal Water Use	Next Week ETc*
	of Water				Seasonal
Crops	Use	70%	80%	90%	Water Use
Almonds	1.3	1.8	1.6	1.4	49.1	0.8
Citrus	0.9	1.2	1.1	1.0	32.2	0.5
Cling Peach	1.3	1.8	1.6	1.4	42.3	0.8
Olives (Table)	1.0	1.5	1.3	1.1	37.3	0.6
Olives (Super High Density)	0.8	1.1	1.0	0.9	29.6	0.5
Pistachios	1.3	1.8	1.6	1.4	44.4	0.8
Prunes	0.9	1.3	1.2	1.0	42.5	0.5
Walnuts	0.8	1.1	1.0	0.9	41.7	0.5
Pasture [ETo]	1.3				49.4	0.8
Urban Turf Grass	1.0				41.2	0.6
Past 7 Days Precip	(0.0)
Accum'd Precip					(5.0)

	Butte County - Biggs				Butte County - Biggs
Crops	Past Week Water Use	Adjusted for System Efficiency			Accum’d Seasonal Water Use	Next Week ETc*

Crops		70%	80%	90%
Almonds	1.2	1.8	1.6	1.4	46.9	0.7
Citrus	0.9	1.2	1.1	1.0	30.9	0.5
Cling Peach	1.2	1.8	1.6	1.4	40.1	0.7
Olives (Table)	1.0	1.4	1.2	1.1	35.7	0.6
Olives (Super High Density)	0.8	1.1	1.0	0.9	28.3	0.5
Pistachios	1.2	1.8	1.6	1.4	42.1	0.7
Prunes	0.9	1.3	1.1	1.0	40.4	0.5
Walnuts	0.8	1.1	1.0	0.9	39.6	0.5
Pasture [ETo]	1.3				47.2	0.8
Urban Turf Grass	1.0				39.3	0.6
Past 7 Days Precip	(0.0)
Accum Precip					(5.0)

	Butte County - Durham				Butte County - Durham
Crops	Past Week Water Use	Adjusted for System Efficiency			Accum’d Seasonal Water Use	Next Week ETc*

Crops		70%	80%	90%
Almonds	1.0	1.4	1.3	1.1	42.8	0.7
Citrus	0.7	1.0	0.9	0.8	28.2	0.5
Cling Peach	1.0	1.4	1.3	1.1	36.5	0.7
Olives (Table)	0.8	1.2	1.0	0.9	32.7	0.6
Olives (Super High Density)	0.7	0.9	0.8	0.7	25.9	0.5
Pistachios	1.0	1.4	1.3	1.1	38.3	0.7
Prunes	0.7	1.0	0.9	0.8	36.8	0.5
Walnuts	0.7	0.9	0.8	0.7	36.3	0.5
Pasture [ETo]	1.1				43.2	0.8
Urban Turf Grass	0.8				36.0	0.6
Past 7 Days Precip	(0.0)
Accum'd Precip					(7.2)

	Colusa County - Williams
Crops	Past Week Water Use	Adjusted for System Efficiency			Accum’d Seasonal Water Use	Next Week ETc*

Crops		70%	80%	90%
Almonds	1.3	1.9	1.7	1.5	45.2	0.7
Citrus	0.9	1.3	1.2	1.0	30.1	0.5
Cling Peach	1.3	1.9	1.7	1.5	38.3	0.7
Olives (Table)	1.1	1.5	1.4	1.2	34.9	0.6
Olives (Super High Density)	0.9	1.3	1.1	1.0	27.7	0.5
Pistachios	1.3	1.9	1.7	1.5	39.8	0.7
Prunes	1.0	1.4	1.2	1.1	39.0	0.5
Walnuts	0.9	1.3	1.1	1.0	38.1	0.5
Pasture [ETo]	1.4				46.1	0.8
Urban Turf Grass	1.1				38.3	0.6
Past 7 Days Precip	(0.0)
Accum'd Precip					(3.0)

Accumulations began on February 21, 2017, or on the approximate leafout date for a specific orchard crop.
*Next week’s predicted ET is based on historical averages for the CIMIS station location.
Estimates are for orchard floor conditions where vegetation is managed by some combination of strip applications of herbicides, frequent mowing or tillage, and by mid and late season shading and water stress. Weekly estimates of soil moisture loss can be as much as 25% higher in orchards where cover crops are planted and managed more intensively for maximum growth.
Typical ranges in irrigation system efficiency are: Drip, 80%-95%; Micro-sprinkler, 80%-90%; Sprinkler, 70%-85%; and Border-furrow, 50%-75%.

Sacramento Valley Orchard Source

Northern Sacramento Valley ET Report – October 13, 2017

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