For the purposes of this chapter, the following definitions shall apply:
"Applied water"means the portion of water supplied by the irrigation system to the landscape.
"Backflow prevention device"means a safety device used to prevent pollution or contamination of the city water supply due to the reverse flow of water from the irrigation system.
"Check valve or anti-drain valve"means a valve located under a sprinkler head or other location in the irrigation system to hold water in the system to prevent drainage from sprinkler heads when the system is off.
"Certified landscape irrigation auditor"means a person certified to perform landscape irrigation audits by an accredited academic institution, a professional trade organization or other program such as the United States Environmental Protection Agency WaterSense Irrigation Auditor Certification Program, licensed landscape architect, and Irrigation Association Certified Landscape Irrigation Auditor Program.
"Certified irrigation designer"means a person certified to design irrigation systems by an accredited academic institution, or a professional trade organization or other program such as the United States Environmental Protection Agency WaterSense Irrigation Designer Certification Program and Irrigation Association Certified Irrigation Designer Program.
"Compost"means the safe and stable product of controlled biologic decomposition of organic materials that is beneficial to plant growth.
"Controller"means a timing device used to remotely control valves that operate an irrigation system. Automatic irrigation controllers are able to self-adjust and schedule irrigation events using either evapotranspiration (weather-based) or soil moisture data.
"Drip irrigation"means any non-spray low volume irrigation system utilizing emission devices with a flow rate measured in gallons per hour. Low volume irrigation systems are specifically designed to apply small volumes of water slowly at or near the root zone of plants.
"Emitter"means a drip irrigation emission device that delivers water slowly from the irrigation system to the soil.
"Environmental utilities department"means the department within the City of Roseville that is responsible for providing utility service with the city. The Roseville water utility is a division within the department responsible for providing retail water service.
"Established landscape"means the point at which plants in the landscape have developed significant roots growth to support themselves. Typically, most plants are established after one or two years of growth.
"Establishment period of the plants"means the first year after installing the plant in the landscape, or the first two years if irrigation will be terminated after establishment. Native habitat mitigation areas and trees may need three to five years for establishment.
"Evapotranspiration (ET)"means the loss of water to the atmosphere by the combined processes of evaporation and transpiration.
"ET adjustment factor (ETAF)"means a factor of 0.55 for residential areas and 0.45 for nonresidential areas, that, when applied to reference evapotranspiration, adjusts for plant factors and irrigation efficiency, two major influences upon the amount of water that needs to be applied to the landscape. The ETAF for new and existing (non-rehabilitated) special landscape areas shall not exceed 1.0. The ETAF for existing, non-rehabilitated landscaping is 0.8.
"Evapotranspiration (ET) rate"means the quantity of water evaporated from adjacent soil and other surfaces and transpired by plants during a specified time.
"Flow rate"means the rate at which water flows through pipes, valves, and emission devices, measured in gallons per minute, gallons per hour, or cubic feet per second.
"Flow sensor"means an inline device installed at the supply point of the irrigation system that produces a repeatable signal proportional to flow rate. Flow sensors must be connected to an automatic irrigation controller, or flow monitor capable of receiving flow signals and operating master valves. This combination flow sensor/controller may also function as a landscape water meter or submeter.
"Friable"means a soil condition that is easily crumbled or loosely compacted down to a minimum depth per planting material requirements, whereby the root structure of newly planted material will be allowed to spread unimpeded.
"Fuel modification plan guideline"means guidelines from a local fire authority to assist residents and businesses that are developing land or building structures in a fire hazard severity zone.
"Graywater"means untreated wastewater that has not been contaminated by any toilet discharge, has not been affected by infectious, contaminated, or unhealthy bodily wastes, and does not present a threat from contamination by unhealthful processing, manufacturing, or operating wastes. "Graywater" includes, but is not limited to, wastewater from bathtubs, showers, bathroom washbasins, clothes washing machines, and laundry tubs, but does not include wastewater from kitchen sinks or dishwashers. Health and Safety Code Section
17922.12.
means any durable surface material (pervious and non-pervious).
"Homeowner-provided landscaping"means landscaping either installed by a private individual for a single-family residence or installed by a licensed contractor hired by a homeowner.
"Hydrozone"means a portion of the landscaped area having plants with similar water needs and rooting depth. A hydrozone may be irrigated or non-irrigated.
"Infiltration rate"means the rate of water entry into the soil expressed as a depth of water per unit of time (i.e., inches per hour).
"Invasive plant species"means species of plants not historically found in California that spread outside cultivated areas and can damage environmental or economic resources. Invasive species may be regulated by county agricultural agencies as noxious species. Lists of invasive plants are maintained at the California Invasive Plant Inventory and USDA invasive and noxious weeds database.
"Irrigation audit"means an in-depth evaluation of the performance of an irrigation system conducted by a certified landscape irrigation auditor. An irrigation audit includes, but is not limited to: inspection, system tune-up, system test with distribution uniformity or emission uniformity, reporting overspray or run off that causes overland flow, and preparation of an irrigation schedule. The audit must be conducted in a manner consistent with the Irrigation Association's Landscape Irrigation Auditor Certification Program or other U.S. Environmental Protection Agency "WaterSense" labeled auditing program.
"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. The irrigation efficiency for purposes of this chapter is 0.75 for overhead spray devices and 0.81 for drip systems.
"Irrigation survey"means an evaluation of an irrigation system that is less detailed than an irrigation audit. An irrigation survey includes, but is not limited to: inspection, system test and written recommendations to improve performance of the irrigation system.
"Landscaped area (LA)"means all of the planting areas, turf areas, and water features in a landscape design plan subject to the maximum applied water allowance calculation. The landscape area does not include footprints of buildings or structures, sidewalks, driveways, parking lots, decks, patios, gravel or stone walks, other pervious or non-pervious hardscapes, and other non-irrigated areas designated for nondevelopment (e.g., open spaces and existing native vegetation).
"Landscape architect"means a person who holds a license to practice landscape architecture in the state of California (Business and Professions Code Section
5615).
means a person licensed possessing a valid C-27 license by the state of California to construct, maintain, repair, install, or subcontract the development of landscape systems.
"Landscape project"means the total area of landscape in a project as defined in "landscape area," for the purposes of this chapter, meeting the requirements under Section
14.18.030.
means an inline device installed at the irrigation supply point that measures the flow of water into the irrigation system and is connected to a totalizer to record water use.
"Lateral line"means the water delivery pipeline that supplies water to the emitters or sprinklers from the valve. This pipeline is typically downstream of the zone control valve and non-pressurized when irrigation is not occurring.
"Low volume irrigation"means the application of irrigation water at low pressure through a system of tubing or lateral lines and low-volume emitters such as drip, drip lines, and bubblers. Low volume irrigation systems are specifically designed to apply small volumes of water slowly at or near the root zone of plants.
"Main line"means the pressurized pipeline that delivers water from the water source to the valve or outlet. This pipeline is typically pressurized at all times.
"Master shut-off valve"is an automatic valve installed at the irrigation supply point which controls water flow into the irrigation system. When this valve is closed water will not be supplied to the irrigation system. A master valve will greatly reduce any water loss due to a leaky station valve.
"Maximum applied water allowance (MAWA)"means the upper limit of annual applied water for the established landscaped area as specified in Section 14.18.050(B)(2). MAWA is based upon the area's reference evapotranspiration, the ET adjustment factor, and the size of the landscaped area. The estimated total water use shall not exceed the maximum applied water allowance. Special landscape areas, including recreation areas, areas permanently and solely dedicated to edible plants such as orchards and vegetable gardens, and areas irrigated with recycled water are subject to the MAWA with an ETAF not to exceed 1.0. MAWA = (ETo) (0.62) [(ETAF x LA) + ((1-ETAF) x SLA)].
"Median"is an area between opposing lanes of traffic that may be unplanted or planted with trees, shrubs, perennials, and ornamental grasses.
"Microclimate"means the climate of a small, specific area that may contrast with the climate of the overall landscape area due to factors such as: wind, sun exposure, plant density or proximity to reflective surfaces.
"Mulch"means any organic material such as leaves, bark, straw or other inorganic mineral materials such as rocks, gravel, and decomposed granite left loose and applied to the soil surface for the beneficial purposes of reducing evaporation, suppressing weeds, moderating soil temperature and preventing soil erosion.
"Nonresidential landscape"means landscapes in commercial, institutional, industrial and public settings that may have areas designated for recreation or public assembly. It also includes portions of common areas of common interest developments with designated recreational areas.
"Operating pressure"means the pressure at which the parts of an irrigation system are designed by the manufacturer to operate.
"Overspray"means the irrigation water which is delivered beyond the target area.
"Parkway"means the area between a sidewalk and the curb or traffic lane. It may be planted or unplanted, and with or without pedestrian egress.
"Permit"means any authorizing document issued by the City of Roseville for new construction or rehabilitated landscaping.
"Pervious"means any surface or material that allows the passage of water through the material and into the underlying soil.
"Plant factor or plant water use factor"means a factor, when multiplied by the ETo, estimates the amount of water needed by plants. For purposes of this chapter, 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 0.1 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 cited in this chapter 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).
"Project applicant"means the individual or entity submitting a landscape documentation package required under Section
14.18.050 to request a permit, plan check or design review from the city. A project applicant may be the property owner or designee.
means a set of reproducible drawings which show significant changes in the work made during construction and which are usually based on drawings marked up in the field and other data furnished by the contractor.
"Recreational area"means areas, excluding private single-family residential areas, designated for active play, recreation or public assembly in parks, sports fields, picnic grounds, amphitheaters or golf courses tees, fairways, roughs, surrounds and greens.
"Reference evapotranspiration (ETo)"means a standard measurement of environmental parameters which affect the water use of plants. ETo is given in inches per day, month, or year as represented below, and is an estimate of the evapotranspiration of a large field of four- to seven-inch tall, cool season turf that is well watered. Reference evapotranspiration is used as the basis of determining the maximum applied water allowances so that regional differences in climate can be accommodated. Refer to Section 14.18.050(B)(2) for City of Roseville ETo.
"Rehabilitated landscaping"means any re-landscaping project that requires a building permit, improvement plan approval, or design review and meets the requirements of Section
14.18.030.
means water which is not absorbed by the soil or landscape to which it is applied and flows from the landscape area. For example, runoff may result from water that is applied at too great a rate or too great a volume (application rate exceeds infiltration rate) or when there is a slope.
"Slope"means the steepness, incline, gradient, or grade of a straight line. A higher slope value indicates a steeper incline.
"Soil texture"means the classification of soil based on its percentage of sand, silt, and clay in the soil.
"Special landscape area (SLA)"means an area of the landscape dedicated solely to edible plants, recreational areas, areas irrigated with recycled water, or water features using recycled water.
"Station"means an area served by one valve or by a set of valves that operate simultaneously.
"Stormwater quality design manual"means the most recent version of the design manual for the Sacramento and South Placer regions which sets forth the design criteria and operation and maintenance requirements for stormwater control measures.
"Swing joint"means an irrigation component that provides a flexible, leak-free connection between the emission device and lateral pipeline to allow movement in any direction and to prevent equipment damage.
"Submeter"means a metering device to measure water applied to the landscape that is installed after the primary utility water meter.
"Temporarily irrigated areas"means either: (1) landscaping which is reliant on irrigation for a temporary duration of time to allow plant root establishment; or (2) areas such as unfinished building pads, or other areas approved for future development, in which landscaping is planted on an interim basis.
"Turf"means a groundcover surface of mowed grass. Annual bluegrass, Kentucky bluegrass, Perennial ryegrass, Red fescue, and Tall fescue are common cool-season grasses. Bermudagrass, Kikuyugrass, Seashore Paspalum, St. Augustinegrass, Zoysiagrass, and Buffalo grass are common warmseason grasses.
"Valve"means a device used to control the flow of water in the 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 landscape area. Constructed wetlands used for on-site wastewater treatment or stormwater best management practices that are not irrigated and used solely for water treatment or stormwater retention are not water features and, therefore, are not subject to the water budget calculation.
"WUCOLS"means Water Use Classification of Landscape Species published by the University of California Co-operative Extension, the Department of Water Resources, and the Bureau of Reclamation, as may be amended.
(Ord. 5659 § 2, 2016)