Spreadsheet: 2128d001-83e4-4dcb-88d0-1a337a0ecf0c
Sheet: 4. Outdoor Water Demand

NON-POTABLE WATER CALCULATOR
Step 4 of 7: Calculate Outdoor Water Demand (Landscape Irrigation, Outdoor Water Features)
 | Project Name: |  |  |  | LEGEND:
 |  |  |  |  | [NAME]
 |  |  |  |  | Linked from User Input
 | Instructions: |  |  |  | Default Value
 | Annual outdoor water demand is calculated based on landscape irrigation demand and demand associated with other outdoor features such as decorative fountains. User input is required in Sections A and B. This step also includes information on compliance with the City's landscape irrigation ordinance in Section C. |  |  |  | Autogenerated Value
 | A. LANDSCAPE IRRIGATION DEMAND
 | User Input Instructions:
 | Default irrigation factors are provided in the cells below; refine default values as appropriate
 |  |  | ft2 |  |  |  |  | Definitions - For more guidance, refer to: |  |  | The Guide to Estimating Water Needs of Landscape Plantings in CA
 | Crop Coefficient - Kc | 0.7 | [[NAME] as appropriate] Cool season grasses = 0.8, Warm season grasses = 0.6 |  |  |  |  | Crop Coefficient (KC):
 |  |  | ft2 |  |  |  |  | Water loss from turfgrass or a crop.
 | Species Factor - ks | 0.5 | [[NAME] as appropriate] <0.1 for very low, 0.1-0.3 for low, 0.4-0.6 for medium, 0.7-0.9 for high
 | Density Factor - kd | 1 | [[NAME] as appropriate] 0.5-0.9 for low, 1 for average, 1.1-1.3 for high. |  |  |  |  | Landscape Coefficient (KL):
 | Microclimate Factor - kmc | 1 | [[NAME] as appropriate] 0.5-0.9 for low, 1 for average, 1.1-1.4 for high. |  |  |  |  | Water loss from landscape plantings based on species, density and microclimate factors.
 | Landscape Coefficient - KL |  | KL = ks*kd*kmc
 |  |  | ft2 |  |  |  |  | Species Factor (ks):
 | Species Factor - ks | 0.1 | [[NAME] as appropriate] <0.1 for very low, 0.1-0.3 for low, 0.4-0.6 for medium, 0.7-0.9 for high. |  |  |  |  | Used to account for differences in species' water needs. Refer to Pg. 12 of the Guide to Estimating Water Needs of Landscape Plantings in CA to determine species factors.
 | Density Factor - kd | 1 | [[NAME] as appropriate] 0.5-0.9 for low, 1 for average, 1.1-1.3 for high.
 | Microclimate Factor - kmc | 1.2 | [[NAME] as appropriate] 0.5-0.9 for low, 1 for average, 1.1-1.4 for high.
 | Landscape Coefficient - KL |  | KL = ks*kd*kmc |  |  |  |  | Density Factor (kd):
 |  |  | ft2 |  |  |  |  | Used to account for differences in vegetation density among landscape plantings. Refer to Pg. 18 of the Guide to Estimating Water Needs of Landscape Plantings in CA on how to determine density factors.
 | Species Factor - ks | 0 | [[NAME] as appropriate] <0.1 for very low, 0.1-0.3 for low, 0.4-0.6 for medium, 0.7-0.9 for high.
 | Density Factor - kd | 0 | [[NAME] as appropriate] 0.5-0.9 for low, 1 for average, 1.1-1.3 for high.
 | Microclimate Factor - kmc | 0 | [[NAME] as appropriate]  0.5-0.9 for low, 1 for average, 1.1-1.4 for high.
 | Landscape Coefficient - KL |  | KL = ks*kd*kmc |  |  |  |  | Microclimate Factor (kmc):
 | Total Irrigation Area |  | ft2 |  |  |  |  | Used to account for differences in microclimate in every landscape. An "average" microclimate condition is equivalent to reference evapotranspiration conditions. This microclimate is not substantially affected by nearby buildings, structures, pavements, slopes or reflective surfaces.
 | Average Coefficient
 | Irrigation Efficiency | 0.9 | [[NAME] as appropriate]  Estimated efficiencies are 0.70 to 0.85 for spray, 0.9 for drip, 0.95 for subsurface drip.
 | Site Location (ET0 Zone)
 | Month | Ave. Monthly Rainfall | Reference Evapotranspiration | Actual Evapotranspiration | Irrigation Demand |  |  | % of Annual
 |  | in/month | ET0 | ETL | ft3/month | gal/mo | gpd |  |  | Month | (in/unit area) | days/mo
 | January | 4.5616 |  |  |  |  |  |  |  | January |  | 31
 | February | 3.845 |  |  |  |  |  |  |  | February |  | 28
 | March | 2.9074 |  |  |  |  |  |  |  | March |  | 31
 | April | 1.412061855670103 |  |  |  |  |  |  |  | April |  | 30
 | May | 0.6282558139534884 |  |  |  |  |  |  |  | May |  | 31
 | June | 0.2203030303030303 |  |  |  |  |  |  |  | June |  | 30
 | July | 0.04972222222222222 |  |  |  |  |  |  |  | July |  | 31
 | August | 0.1076086956521739 |  |  |  |  |  |  |  | August |  | 31
 | September | 0.3703125 |  |  |  |  |  |  |  | September |  | 30
 | October | 1.034639175257732 |  |  |  |  |  |  |  | October |  | 31
 | November | 2.684948453608247 |  |  |  |  |  |  |  | November |  | 30
 | December | 4.083232323232323 |  |  |  |  |  |  |  | December |  | 31
 | TOTAL
 | B. OTHER OUTDOOR DEMANDS THAT CAN BE MET WITH NON-POTABLE SUPPLIES
 | User Input Instructions:
 | Please specify other non-potable demands associated with outdoor water use below.
 |  |  | Estimated Value | Unit
 | Outdoor Decorative Water Feature: |  | 100 | gpd
 | E.g. outdoor fountains with no contact |  | 250 | no. of days
 |  |  |  | [NAME]
 | Other Non-Potable Demand
 | <Please specify here> |  | 0 | gpd
 |  |  | 0 | no. of days
 |  |  |  | [NAME]
 | C. COMPLIANCE WITH STATE'S MAXIMUM APPLIED WATER ALLOWANCE - for projects that include 1,000 ft2 or more of new or modified landscape
 | (No user input needed - auto-calculated from inputs in Step 1)
 | Average ET0 of San Francisco provided by State |  | 35.1 | ETo (inches/year)
 | Total Landscape Area |  |  | LA (ft2)
 | (All planting areas, turf areas, and water features, such as fountains, including areas in the public right of way for which the owner is responsible. Landscape area does not include building footprints, unless the footprint includes planted areas such as a living roof. Landscape area does not include pervious or non-pervious hardscapes such as patios, walkways or driveways.
 | Special Landscape Area (SLA) |  |  | SLA (ft2)
 | (SLA means an area of the landscape dedicated solely to edible plants, areas irrigated with recycled water, water features using recycled water and areas dedicated to active play such as parks, sports fields, golf courses, and where turf provides a playing surface)
 | Maximum Applied Water Allowance (MAWA)
 | (A MAWA is also referred to as a water budget. It is the number of gallons per year which is allowed to maintain a landscape in San Francisco, given the climatic conditions)
 | MAWA = (ET0) x (0.62) x [(0.7 x LA)+(0.3 x SLA)] |  |  | [NAME] | This is the maximum amount of water per year allowed for landscape irrigation for this project.
 |  |  |  |  | Note: Landscape areas irrigated with nonpotable supplies may have a MAWA that exceeds those for landscapes irrigated with potable water by 20%
 | Compliance Check
 | Estimated Total Outdoor Water Use |  |  | [NAME] | This is the estimated amount of water use associated with landscaping irrigation and water features in this project
 | Is the project compliant?
 | The project's estimated outdoor water use exceeds MAWA by: |  |  | [NAME]
 | Click here to access the San Francisco Efficient Irrigation Ordinance website
 | >>> Please proceed on to Step 5: Calculate Outdoor Water Supply