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 Watering Index

The Watering Index for July 24th through July 30th is 72%.
 

 CIMIS Station    Welcome to Turf-Time! 

The following irrigation scheduling recommendations are based on data from our weather stations located in Santa Rosa. This information is also available via a recorded phone message at (707) 543-3466.

If your timer has a seasonal adjust/water budget % option, schedule your controller with a warm summer month's (July) schedule, then use the watering index on the left side of this page to adjust your irrigation schedule to match the current weather. To learn how to use the watering index click here
 

WATERING INFORMATION

WEST SIDE

For the week of July 24th through July 30th water lawns 9/10 inches to replace evapotranspiration which is the water used by the grass and lost through evaporation.

To apply 9/10 inches, run spray-type sprinklers for a total of 27 minutes for the week. Run impact or rotor sprinklers for a total 72 minutes for the week. These runtimes are based on assumed precipitation rates of 2 inches per hour for spray-type sprinklers and 3/4 inches per hour for impact or rotor sprinklers.

Apply the weekly recommendation over 2-3 watering days. To reduce runoff and increase depth of infiltration use repeat start times and allow at least one hour between start times so the water can soak into the soil.

For help determining sprinkler type, precipitation rates, or information about using TURF-TIME for your entire garden, call (707) 543-3985, Monday through Thursday and alternating Fridays.

EAST SIDE

For the week of July 24th through July 30th water lawns 1 inch to replace evapotranspiration which is the water used by the grass and lost through evaporation.

To apply 1 inch, run spray-type sprinklers for a total of 30 minutes for the week. Run impact or rotor sprinklers for a total 80 minutes for the week. These runtimes are based on assumed precipitation rates of 2 inches per hour for spray-type sprinklers and 3/4 inches per hour for impact or rotor sprinklers.

Apply the weekly recommendation over 2-3 watering days. To reduce runoff and increase depth of infiltration use repeat start times and allow at least one hour between start times so the water can soak into the soil.

For help determining sprinkler type, precipitation rates, or information about using TURF-TIME for your entire garden, call (707) 543-3985, Monday through Thursday and alternating Fridays.

DRIP IRRIGATION

 For the week of July 24th through July 30th apply drip irrigation .9 inches to replace evapotranspiration which is the water used by the plants and lost through evaporation.

To apply .9 inches, run drip circuits for moderate water-use plants for a total of 37 minutes for the week. Run drip circuits for low water-use plants for a total 18 minutes for the week.

Apply the weekly recommendation over 1 watering day. This run time is based on an assumed precipitation rate of 1 inch per hour. 

For help determining sprinkler type, precipitation rates, or information about using TURF-TIME for your entire garden, call (707) 543-3985, Monday through Thursday and alternating Fridays.

The following documents contain evapotranspiration data and rainfall data for our weather stations on the East and West side of Santa Rosa. The document is separated into three sections:

Reference Evapotranspiration (ETo) Data in inches, which displays reference evapotranspiration rates for cool season turf 4 to 6 inches tall, well watered, and densely planted in large pastures.

Rainfall Data in inches, which displays rainfall data collected at the Laguna Wastewater Treatment Plant in Santa Rosa. 

ETo in inches Minus Effective Rainfall in inches, which combines the data of the first two tables. Because not all rainfall received is useful to plants, rainfall data has been adjusted to account for this. That is why the title of this table refers to "effective rainfall".

Historical data from the weather station for the west side of Santa Rosa

Historical data from the weather station for the east side of Santa Rosa

 

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