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Weekly Watering Schedule
Weekly Watering Schedule
Click here if you would like to receive the Weekly Watering Schedule via e-mail or to join any of our other e-mail interest lists. The Weekly Watering Schedule is also available in English and Spanish by calling (415) 945-1578. The recording is updated every Friday during irrigation season.
Weekly ETo Information
Note: The weekly ETo data represents the amount of soil moisture lost during the week listed below. The watering schedules for any given week are calculated to replenish the soil moisture lost the previous week. Learn more about ETo.
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Week Beginning:
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8/27/2010
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Week Ending:
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9/2/2010
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Weekly ETo:
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1.19
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Weekly Rainfall:
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0
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Percent Change from Prev. Week:
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-5.6%
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WATERING INDEX: 80%
The Watering Index (Index) is a guide to help people adjust watering schedules for irrigation controllers that include a water budget adjustment feature. This feature (either a button or a dial) eliminates the need to change the watering times one-by-one for each irrigation valve, and permits the watering run times for all valves to be increased or decreased with just one adjustment. Learn more about the Watering Index.
Weekly Watering Schedule
The following watering times are based on the previous week's ETo, which means that by following this schedule you will be replacing the amount of soil moisture lost last week. These times are for a full seven-day period, so remember to divide the number of minutes provided below by the number of days that you irrigate per week to get the watering minutes for each of your irrigation days.
Questions regarding the weekly watering schedule should be directed to the Water Conservation Department at (415) 945-1525.
Click On Your Climate Zone for Your Weekly Watering Schedules:
Note: See map below for zone clarification
Northern Zone
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Category
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Minutes
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Spray System: Turf
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42
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Spray System: High Water Use Plants
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31
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Spray System: Low Water Use Plants
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13
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Drip System, High Water Use Plants
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Minutes
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1 ft. Canopy
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17
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2 ft. Canopy
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68
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3 ft. Canopy
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153
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Drip System, Low Water Use Plants
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Minutes
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1 ft. Canopy
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7
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2 ft. Canopy
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29
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3 ft. Canopy
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66
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Runtime Calculation Assumptions:
The minutes of runtime provided are based on a 2 inch-per-hour precipitation rate for spray irrigation systems, and 2 gallons-per-hour per plant application rate for drip irrigation systems. Your actual precipitation or application rates may vary. For information on how to determine your precipitation rate, click here.
Glossary of Terms
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Central Zone
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Category
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Minutes
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Spray System: Turf
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38
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Spray System: High Water Use Plants
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28
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Spray System: Low Water Use Plants
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12
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Drip System, High Water Use Plants
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Minutes
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1 ft. Canopy
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15
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2 ft. Canopy
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61
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3 ft. Canopy
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138
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Drip System, Low Water Use Plants
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Minutes
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1 ft. Canopy
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7
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2 ft. Canopy
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26
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3 ft. Canopy
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59
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Runtime Calculation Assumptions:
The minutes of runtime provided are based on a 2 inch-per-hour precipitation rate for spray irrigation systems, and 2 gallons-per-hour per plant application rate for drip irrigation systems. Your actual precipitation or application rates may vary. For information on how to determine your precipitation rate, click here.
Glossary of Terms
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Southern Zone
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Category
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Minutes
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Spray System: Turf
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26
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Spray System: High Water Use Plants
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19
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Spray System: Low Water Use Plants
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8
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Drip System, High Water Use Plants
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Minutes
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1 ft. Canopy
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10
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2 ft. Canopy
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41
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3 ft. Canopy
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92
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Drip System, Low Water Use Plants
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Minutes
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1 ft. Canopy
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4
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2 ft. Canopy
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18
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3 ft. Canopy
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40
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Runtime Calculation Assumptions:
The minutes of runtime provided are based on a 2 inch-per-hour precipitation rate for spray irrigation systems, and 2 gallons-per-hour per plant application rate for drip irrigation systems. Your actual precipitation or application rates may vary. For information on how to determine your precipitation rate, click here.
Glossary of Terms
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