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Part 1 presents the Landscape Coefficient Method (LCM) for calculating water requirements, from crop and turf needs to evapotranspiration estimation, irrigation efficiency, total applied water, and calculation worksheets. Part 2 provides WUCOLS III evaluations for individual species, supporting planning and management through standardized conditions, categories, and regions, plus reference tables and appendices.",{"@graph":63,"@context":118},[64,80,101],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":11,"@type":70,"position":76},"https://docshare.wps.com/template/presentations/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/a-guide-to-estimating-irrigation-water-needs-of-landscape-plantings-in-california-the-landscape-coefficient-method-and-wucols-iii-preface-contents/565843/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/a-guide-to-estimating-irrigation-water-needs-of-landscape-plantings-in-california-the-landscape-coefficient-method-and-wucols-iii-preface-contents/565843.png","ImageObject",442,249,{"name":88,"@type":89},"Jiven","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-10-19","2026-10-13",true,{"@type":98,"interactionType":99,"userInteractionCount":76},"InteractionCounter",{"@type":100},"ViewAction",{"@type":102,"mainEntity":103},"FAQPage",[104,110,114],{"name":105,"@type":106,"acceptedAnswer":107},"What are the two parts of the guide, and how do they work together?","Question",{"text":108,"@type":109},"Part 1 explains the Landscape Coefficient Method for calculating irrigation water needs. Part 2 (WUCOLS III) provides species-specific evaluations. Used together, they give the information needed to estimate irrigation water needs for landscape plantings.","Answer",{"name":111,"@type":106,"acceptedAnswer":112},"Does the Landscape Coefficient Method provide exact water needs?",{"text":113,"@type":109},"LCM calculations provide estimates of water needs rather than exact values. Adjustments to irrigation amounts may be needed in the field.",{"name":115,"@type":106,"acceptedAnswer":116},"What does WUCOLS III provide?",{"text":117,"@type":109},"WUCOLS III provides evaluations of water needs for individual landscape species, including standardized conditions, categories of water needs, plant types, and regions to support landscape planning and management.","https://schema.org",{"og:url":78,"og:type":120,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":122,"canonical":78},"index,follow",{"doc_id":124,"site_id":56},565843,1792360339,{"code":4,"msg":5,"data":127},{"doc_id":124,"user_id":128,"nickname":88,"user_avatar":129,"doc_module":9,"category_id":8,"category_name":11,"doc_title":59,"doc_description":61,"doc_content":130,"file_id":131,"file_url":132,"file_type":133,"file_size":134,"view_count":76,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":135,"language":136,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":137,"faqs":138,"seo_title":139,"seo_description":61,"update_tm":140,"read_time":141},1099513958607,"https://ap-avatar.wpscdn.com/avatar/100002390cf8733938c?x-image-process=image/resize,m_fixed,w_180,h_180&k=1778829742770036399","A Guide  \nto  \nEstimating Irrigation Water Needs  \nof Landscape Plantingsin California  \nThe Landscape Coefficient Method and WUCOLS III  \nUniiversiity of Calliifforniia Cooperatiive Extensiion Calliifforniia Department of Water Resources  \nCover photo: The Garden at Heather Farms, Walnut Creek, CA  \nThis Guide is a free publication. Additional copies maybe obtained from:  \nDepartment of Water Resources  \nBulletins and Reports  \nP. O. Box 942836  \nSacramento, California 94236-0001  \n(916) 653-1097  \nPhotography: L. R. Costello and K.S. Jones, University of California Cooperative Extension  \nPublication Design: A.S. Dyer, California Department of Water Resources  \nA Guide  \nto  \nEstimating Irrigation Water Needs  \nof Landscape Plantingsin  \nCalifornia  \nThe Landscape Coefficient Method  \nand  \nWUCOLS III*  \n*WUCOLS is the acronym for Water Use Classifications of Landscape Species.  \nUniversity of California Cooperative Extension  \nCalifornia Department of Water Resources  \nPreface  \nThis Guide consists of two parts, each formerly a separate publication:  \nPart 1—Estimating the Irrigation Water Needs of Landscape Plantings in California: The Landscape Coefficient Method  \n• L.R. Costello, University of California Cooperative Extension  \n• N.P. Matheny, HortScience, Inc., Pleasanton, CA  \n• J.R. Clark, HortScience Inc., Pleasanton, CA  \nPart 2—WUCOLS III (Water Use Classification of Landscape Species)  \n• L.R. Costello, University of California Cooperative Extension  \n• K.S. Jones, University of California Cooperative Extension  \nPart 1 describes a method for calculating landscape water needs, while Part 2 gives evaluations of wa-  \nter needs for individual species. Used together, they provide the information needed to estimate irrigation water needs of landscape plantings.  \nPart 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.  \nPart 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.  \nThese two publications are companion documents and are intended to be used together.  \nFirst-time readers are encouraged to carefully review both parts of this Guide before making estimates of landscape water needs.  \nEschscholzia california, California poppy  \nContents  \nPart 1ÑThe Landscape Coefficient Method ............................................................ 1  \nIntroduction ...................................................... 3  \nChapter 1—Estimating Water Requirements for Crops and Turf..................... 5  \nChapter 2—Estimating Water Needs for Landscape Plantings ......................................... 9  \nChapter 3—Using the Landscape Coefficient Formula .......................................... 23  \nChapter 4—Using the Landscape Coefficient to Estimate Landscape Evapotranspiration ........................................... 27  \nChapter 5—Irrigation Efficiency and Calculating the Total Amount of Water to Apply ................................................................ 29  \nChapter 6—Putting it all Together: A Worksheet for Calculations .............................. 33  \nChapter 7—Using Water Estimates in Landscape Planning and Management ............. 37  \nChapter 8—Special Planting Situations .......... 39  \nPart 2ÑWUCOLS III ..................................... 45  \nProject Participants ........................................... 46  \nIntroduction ...................................................... 49  \nGetting Started .................................................. 51  \nCategories of Water Needs ......................... 52  \nStandard Conditions ................................... 53  \nPlant Types .....","cbCailGUVvokotEv","https://ap.wps.com/l/cbCailGUVvokotEv","pdf",3913106,160,"English","# Preface\n# Part 1—The Landscape Coefficient Method\n## Introduction\n## Chapter 1—Estimating Water Requirements for Crops and Turf\n## Chapter 2—Estimating Water Needs for Landscape Plantings\n## Chapter 3—Using the Landscape Coefficient Formula\n## Chapter 4—Using the Landscape Coefficient to Estimate Landscape Evapotranspiration\n## Chapter 5—Irrigation Efficiency and Calculating the Total Amount of Water to Apply\n## Chapter 6—Putting it all Together: A Worksheet for Calculations\n## Chapter 7—Using Water Estimates in Landscape Planning and Management\n## Chapter 8—Special Planting Situations\n# Part 2—WUCOLS III\n## Project Participants\n## Introduction\n## Getting Started\n## Categories of Water Needs\n## Standard Conditions\n## Plant Types\n## Regions\n## Other Important Information About the Guide\n## Species Evaluations\n## Key to Symbols\n## Species Evaluation List—1999\n## Common Names Index\n## Turfgrasses\n# Appendices\n## A—Reference Evapotranspiration Values for Selected Locations in California\n## B—Invasive Species\n## C—Glossary\n## D—Additional Resources","[{\"question\":\"What are the two parts of the guide, and how do they work together?\",\"answer\":\"Part 1 explains the Landscape Coefficient Method for calculating irrigation water needs. Part 2 (WUCOLS III) provides species-specific evaluations. Used together, they give the information needed to estimate irrigation water needs for landscape plantings.\"},{\"question\":\"Does the Landscape Coefficient Method provide exact water needs?\",\"answer\":\"LCM calculations provide estimates of water needs rather than exact values. Adjustments to irrigation amounts may be needed in the field.\"},{\"question\":\"What does WUCOLS III provide?\",\"answer\":\"WUCOLS III provides evaluations of water needs for individual landscape species, including standardized conditions, categories of water needs, plant types, and regions to support landscape planning and management.\"}]","A Guide to Estimating Irrigation Water Needs of Landscape Plantings in California - The Landscape Coefficient Method and WUCOLS III - Preface - Contents | PDF",1791859346,56]