Full TGIF Record # 289869
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Web URL(s):http://www.irrigation.org/IA/FileUploads/IA/Resources/TechnicalPapers/2013/MakingSenseOfETAdjustmentFactorsForBudgetingAndManagingLandscapeIrrigation.pdf
    Last checked: 10/06/2017
    Requires: PDF Reader
Publication Type:
i
Proceedings
Author(s):Pittenger, Dennis; Shaw, Davis
Author Affiliation:Pittenger: Area Environmental Horticulturist, University of California Cooperative Extension, Los Angeles County/U.C. Riverside and U.C. Riverside Department of Botany and Plant Sciences, Riverside, CA; Shaw: Farm Advisor, University of California Cooperative Extension, San Diego County, San Marcos, CA
Title:Making sense of ET adjustment factors for budgeting and managing landscape irrigation
Section:Turf
Other records with the "Turf" Section
Source:Irrigation Show 2013: Technical Session Proceedings. 2013, p. 1-11.
Publishing Information:[Falls Church, Virginia]: [Irrigation Association]
# of Pages:11
Keywords:TIC Keywords: Crop coefficient; Evapotranspiration; Plant physiology; Water conservation; Water requirements
Abstract/Contents:"Landscape water budgeting and conservation are central to many urban development programs and codes, water purveyor delivery and pricing policies, and professional landscape irrigation management practices. These programs, policies, and practitioners often use various approaches to calculate and establish a site's water-conserving irrigation budget and irrigation schedules based in part on estimated local reference evapotranspiration (ETo) data. These calculations can involve an assortment of ETo adjustment factors associated with plant species, site characteristics, or other influences on how much water a landscape requires or should be allocated. Depending on the formula used, the adjustments to ETo can be fixed, variable, or some combination. Science in landscape plant water requirements and plant ecology shows it is illogical to apply guesstimated user-selected ETo adjustment factors for microclimate and plant density or to use a species-specific plant factor (PF) to adjust ETo that are derived from nonscientific data bases. Rather, research shows that a distinct PF applies to each of the following plant type groups: turfgrass; trees, shrubs and groundcovers; annual flowers; herbaceous perennials; and desert plants. Except where there are microclimate influences that can be quantified scientifically to be significantly different from the location where ETo is calculated, a landscape water requirement can be simply yet effectively estimated by applying just the appropriate research-based plant-type PF's, such as follows: Gallons of Water = ETo (inches) X PF (fraction) X Landscape Area (square feet of plant type) X 0.62."
Language:English
References:40
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Pittenger, D., and D. Shaw. 2013. Making sense of ET adjustment factors for budgeting and managing landscape irrigation. p. 1-11. In Irrigation Show 2013: Technical Session Proceedings. [Falls Church, Virginia]: [Irrigation Association].
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Web URL(s):
http://www.irrigation.org/IA/FileUploads/IA/Resources/TechnicalPapers/2013/MakingSenseOfETAdjustmentFactorsForBudgetingAndManagingLandscapeIrrigation.pdf
    Last checked: 10/06/2017
    Requires: PDF Reader
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