"Applied water"means the portion of water supplied by the irrigation system to the landscape.
"Estimated applied water use"means the average annual total amount of water estimated to be necessary to keep plants in a healthy state, calculated as provided in the Guidelines. It is based on the reference evapotranspiration rate, the size of the landscape area, plant water use factors, and the relative irrigation efficiency of the irrigation system.
"Evapotranspiration (ET) adjustment factor" or "ETAF"is equal to the plant factor divided by the irrigation efficiency factor for a landscape project, as described in the Guidelines. The ETAF is calculated in the context of local reference evapotranspiration, using site-specific plant factors and irrigation efficiency factors that influence the amount of water that needs to be applied to the specific landscaped area. The evapotranspiration adjustment factor (ETAF) for the landscape project shall not exceed a factor of 0.55 for residential areas and 0.45 for non-residential areas, exclusive of special landscape areas. The ETAF for a special landscape area shall not exceed 1.0. ETAF for existing non-rehabilitated landscapes is 0.8.
"Guidelines"refers to the Guidelines for Implementation of the water efficient landscape provisions included in Section
21.20.050(c), as adopted by the city council, which describes procedures, calculations, and requirements for landscape projects subject to the water efficient landscape provisions.
"Hydrozone"means a portion of the landscaped area having plants with similar water needs that are served by a valve or set of valves with the same schedule. A hydrozone may be irrigated or nonirrigated. For example, a naturalized area planted with native vegetation that will not need supplemental irrigation once established is a nonirrigated hydrozone.
"Irrigation efficiency"means the measurement of the amount of water beneficially used divided by the amount of water applied. Irrigation efficiency is derived from measurements and estimates of irrigation system characteristics and management practices. Refer to the Guidelines for irrigation efficiency requirements. The irrigation efficiency for purposes of these water efficient landscape provisions of Section
21.20.050(c) are 0.75 for overhead spray devices and 0.81 for drip systems.
"Landscaped area"means all the planting areas, turf areas, and water features in a landscape design plan subject to the maximum applied water allowance and estimated applied water use calculations. The landscaped area does not include footprints of buildings or structures, sidewalks, driveways, parking lots, decks, patios, other pervious or non-pervious hardscapes, and other non-irrigated areas designated for non-development (e.g., open spaces and existing native vegetation).
"Landscape contractor"means a person licensed by the state of California to construct, maintain, repair, install, or subcontract the development of landscape systems.
"Landscaped area"means all the planting areas, turf areas, outdoor dining areas per Section
21.10.070, and water features in a landscape design plan subject to the maximum applied water allowance and estimated applied water use calculations. The landscaped area does not include footprints of buildings or structures, sidewalks, driveways, parking lots, decks, patios, other pervious or non-pervious hardscapes, and other non-irrigated areas designated for non-development (e.g., open spaces and existing native vegetation).
"Landscape documentation package"means the documents required to be provided to the city for review and approval of landscape design projects, as described in the Guidelines.
"Landscape project"means total area of landscape in a project, as provided in the definition of "landscaped area," meeting the requirements under Section
21.20.050(c)(1) of this Water Efficient Landscape Ordinance.
"Landscaping"means the planting and continuous maintenance of some combination of natural vegetation (e.g., trees, shrubs, vines, ground covers, flowers or lawns). In addition to plant life, landscaping may also include synthetic turf, as defined herein, and a limited amount of, benches, ponds, statuary, and other materials as provided for in Section
21.20.050(b)(2)(A) and outdoor dining per Section
21.10.070.
"Local water purveyor"means any entity, including a public agency, city, county, or private water company that provides retail water service.
"Maximum applied water allowance" or "MAWA"means the upper limit of annual applied water for the established landscaped area as specified in Section 2.2 of the Guidelines. It is based upon the area's reference evapotranspiration, the ET Adjustment Factor, and the size of the landscaped area. The estimated applied water use shall not exceed the maximum applied water allowance. MAWA = (ETo) (0.62) [(ETAF x LA) + ((1-ETAF) x SLA)].
"Mined-land reclamation projects"means any surface mining operation with a reclamation plan approved in accordance with the Surface Mining and Reclamation Act of 1975.
"New construction"means a new building with a landscape area or other new landscape area such as a park, playground, or greenbelt without an associated building.
"Non-pervious"means any surface or natural material that does not allow for the passage of water through the material and into the underlying soil.
"Pervious"means any surface or material that allows the passage of water through the material and into the underlying soil.
"Permit"means an authorizing document issued by local agencies for new construction or rehabilitated landscape.
"Plant factor" or "plant water use factor"is a factor, when multiplied by reference evapotranspiration (ETo), that estimates the amount of water needed by plants. The plant factor range for very low water use plants is 0 to 0.1; the plant factor range for low water use plants is 0 to 0.3; the plant factor range for moderate water use plants is 0.4 to 0.6; and the plant factor range for high water use plants is 0.7 to 1.0. Plant factors are derived from the publication "Water Use Classification of Landscape Species." Plant factors may also be obtained from horticultural researchers from academic institutions or professional associations as approved by the California Department of Water Resources (DWR).
"Recreational area"means areas of active play or recreation (e.g., sports fields, schoolyards, picnic grounds) or other areas with intense foot traffic.
"Recycled water" or "reclaimed water"means treated or recycled waste water of a quality suitable for non-potable uses such as landscape irrigation and water features. This water is not intended for human consumption.
"Reference evapotranspiration" or "ETo"means a standard measurement of environmental parameters which affect the water use of plants. ETo is given expressed in inches per day, month, or year as represented in Appendix C of the Guidelines, and is an estimate of the evapotranspiration of a large field of four-to seven-inch tall, cool-season grass that is well watered. Reference evapotranspiration is used as the basis of determining the maximum applied water allowances.
"Rehabilitated landscape"means any re-landscaping project that meets the applicability criteria of Section
21.20.050(c), where the modified landscape area is greater than two thousand five hundred square feet.
"Smart automatic irrigation controller"means an automatic timing device used to remotely control valves that operate an irrigation system and which schedules irrigation events using either evapotranspiration (weather-based) or soil moisture data.
"Special landscape area"means an area of the landscape dedicated solely to edible plants such as orchards and vegetable gardens, areas irrigated with recycled water, water features using recycled water, and recreational areas dedicated to active play such as parks, sports fields, golf courses, and where turf provides a playing surface.
"Synthetic turf"means man-made, synthetic material manufactured from nylon, polypropylene, polyethylene, or a blend of nylon, polypropylene and polyethylene fibers which simulates the appearance of live turf, organic turf, grass, sod, or lawn, and meets the requirements of Section
21.20.070.
"Turf"means a ground cover surface of mowed grass. Annual bluegrass, Kentucky bluegrass, Perennial ryegrass, Red fescue, and Tall fescue are cool-season grasses. Bermudagrass, Kikuyugrass, Seashore Paspalum, St. Augustinegrass, Zoysiagrass, and Buffalo grass are warm-season grasses.
"Valve"means a device used to control the flow of water in an irrigation system.
"Water feature"means a design element where open water performs an aesthetic or recreational function. Water features include ponds, lakes, waterfalls, fountains, artificial streams, spas, and swimming pools (where water is artificially supplied). The surface area of water features is included in the high water use hydrozone of the landscaped area. Constructed wetlands used for on-site wastewater treatment, habitat protection or storm water best management practices that are not irrigated and used solely for water treatment or storm water retention are not water features and, therefore, are not subject to the water budget calculation.
(Ord. 1440 § 2, 2009; Ord. 1507 § 5, 2015; Ord. 1574 § 7, 2021)