Guide to Estimating Irrigation Water Needs of Landscape Plantings

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Preface This Guide consists of two parts, each formerly a separate publication: Part 1—Estimating the Irrigation Water Needs of Landscape Plantings in California: The Landscape Coefficient Method • L.R. Costello, University of California Cooperative Extension • N.P. Matheny, HortScience, Inc., Pleasanton, CA • J.R. Clark, HortScience Inc., Pleasanton, CA Part 1 describes a method for calculating landscape water needs, while Part 2 gives evaluations of water needs for individual species. Used together, they provide the information needed to estimate irrigation water needs of landscape plantings. Part 1 is a revision of Estimating Water Requirements of Landscape Plants: The Landscape Coefficient Method, 1991 (University of California ANR Leaflet No. 21493). Information presented in the original publication has been updated and expanded. Part 2—WUCOLS III (Water Use Classification of Landscape Species) • L.R. Costello, University of California Cooperative Extension • K.S. Jones, University of California Cooperative Extension Part 2 represents the work of many individuals and was initiated and supported by the California Department of Water Resources. This third revision (WUCOLS III) includes many species not previously evaluated, as well as an update and reorganization of support information. These two publications are companion documents and are intended to be used together. First-time readers are encouraged to carefully review both parts of this Guide before making estimates of landscape water needs. Eschscholzia california, California poppy iii
Page 1 and 2: A Guide to Estimating Irrigation Wa
Page 3: A Guide to Estimating Irrigation Wa
Page 9: Part 1 The Landscape Coefficient Me
Page 12 and 13: 2. Economics. Water costs continue
Page 14 and 15: less than 1.0. For example, if wate
Page 17 and 18: Chapter 2— Estimating Water Needs
Page 19 and 20: greater amount of water than a spar
Page 21 and 22: ange. The following is an example o
Page 23 and 24: the incidence of plant injury may i
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Page 27 and 28: For shrubs and groundcovers, canopy
Page 29 and 30: walkways, and open areas at the sit
Page 31 and 32: Chapter 3— Using the Landscape Co
Page 33: climate is average and assigned a v
Page 36 and 37: Even though the ETL formula has giv
Page 38 and 39: Calculation To calculate irrigation
Page 41 and 42: Chapter 6— Putting It All Togethe
Page 43: Worksheet Example A landscape manag
Page 46 and 47: Salts and Leaching Fractions When s
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PROJECT PARTICIPANTS Project Leader
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Introduction Water conservation is
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Categories of Water Needs The key q
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shade-requiring species (e.g., Japa
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Regions Since there are substantial
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Other Important Information About t
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Using Field Data Although substanti
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Species Evaluation List--1999 REGIO
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Common Names Index COMMON NAME arni
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Common Names Index COMMON NAME blad
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Common Names Index COMMON NAME Cali
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Common Names Index COMMON NAME chin
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Common Names Index COMMON NAME cush
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Common Names Index COMMON NAME Euro
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Common Names Index COMMON NAME frin
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Common Names Index COMMON NAME hair
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Common Names Index COMMON NAME Japa
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Common Names Index COMMON NAME lily
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Common Names Index COMMON NAME mist
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Common Names Index COMMON NAME Ozar
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Common Names Index COMMON NAME prim
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Common Names Index COMMON NAME BOTA
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Common Names Index COMMON NAME siss
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Common Names Index COMMON NAME swee
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Common Names Index COMMON NAME vict
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Common Names Index COMMON NAME Yew
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Appendix A— Reference Evapotransp
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California Irrigation Management In
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Appendix B— Invasive Species Cert
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Appendix C— Glossary Acre-foot Th
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Appendix D— Additional Resources
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University of California Publicatio
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