Bay-Friendly Landscaping: 7 Principles for Landscaping Sustainably - June 7, 2007 B AY AY-F RIENDLY RIENDLY L ANDSCAPING ANDSCAPING Creating Drought Resistant Soils Creating Drought Resistant Soils Water Conservation Showcase Water Conservation Showcase March 24, 2009 March 24, 2009 Sarah Sutton, ASLA, LEED AP, Principal Sarah Sutton, ASLA, LEED AP, Principal Design, Community & Environment Design, Community & Environment Geoff Hall Geoff Hall Sentient Landscape, Inc Sentient Landscape, Inc Presentation Objectives Presentation Objectives • Understand the relationship between healthy soils and water conservation • Learn how Bay-Friendly landscape practices build/protect healthy soils • Share experience and lessons learned with compost and mulch • Provide useful information on specifying and using compost and mulch
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BAY-FRIENDLY LANDSCAPING Creating Drought Resistant Soils · Bay-Friendly Landscaping: 7 Principles for Landscaping Sustainably - June 7, 2007 California Water Efficient Landscape
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Bay-Friendly Landscaping: 7 Principles for Landscaping Sustainably - June 7, 2007
•• Minimize use of chemicalsMinimize use of chemicals•• Mulch regularly Mulch regularly
Bay-Friendly Landscaping: 7 Principles for Landscaping Sustainably - June 7, 2007
California Water Efficient California Water Efficient Landscape OrdinanceLandscape Ordinance -- HistoryHistory
•• AB325 AB325 -- Water Conservation in Landscaping Act Water Conservation in Landscaping Act •• Model ordinance drafted by DWR in 1990Model ordinance drafted by DWR in 1990•• Jan 1993: Each local agency was required by state law Jan 1993: Each local agency was required by state law
to adopt policy, create and adopt their own, or issue to adopt policy, create and adopt their own, or issue legal finding that they do not need an ordinance legal finding that they do not need an ordinance –– or or model would become lawmodel would become law
•• Applied to: Applied to: 1.1. new or rehabilitated >2500 sq. feetnew or rehabilitated >2500 sq. feet2.2. Public and privatePublic and private3.3. Commercial, institutional, industrial & MFCommercial, institutional, industrial & MF4.4. MF & SF homes designed and installed by developerMF & SF homes designed and installed by developer5.5. Some exceptionsSome exceptions
California Water Efficient California Water Efficient Landscape Ordinance Landscape Ordinance -- HistoryHistory
•• Western Policy Study 2001Western Policy Study 2001•• 90% of new development in agencies 90% of new development in agencies
with a policywith a policy•• General consensus: better designGeneral consensus: better design
drought tolerant plantsdrought tolerant plantshigher quality and more efficient irrigationhigher quality and more efficient irrigationHowever: inconsistencies in standards, However: inconsistencies in standards, implementation and follow upimplementation and follow upLack of awareness of standardsLack of awareness of standards
Bay-Friendly Landscaping: 7 Principles for Landscaping Sustainably - June 7, 2007
California Water Efficient California Water Efficient Landscape Ordinance Landscape Ordinance –– History History
Additional Reports:Additional Reports:•• Pacific Institute 2003: Waste Not, Want NotPacific Institute 2003: Waste Not, Want Not
Potential outdoor residential water savings of 25Potential outdoor residential water savings of 25--40%:40%:improved landscape managementimproved landscape managementhardware improvements and hardware improvements and landscape design.landscape design.
•• DWR 2005: California Water Plan UpdateDWR 2005: California Water Plan UpdateUse water efficientlyUse water efficientlyProtect water qualityProtect water qualityManage water to protect and restore environmentManage water to protect and restore environment
California Water Efficient California Water Efficient Landscape OrdinanceLandscape Ordinance –– AB 2717AB 2717
CUWCC task force 2004CUWCC task force 2004evaluate and make recommendationsevaluate and make recommendationsgroups on irrigation, planting, economics and othergroups on irrigation, planting, economics and other
Recommendations not includedRecommendations not includedTurf limitationsTurf limitationsLimits on plant choiceLimits on plant choice
Additional recommendations from BFLAdditional recommendations from BFLStrengthen soil management to include amending Strengthen soil management to include amending soil to increase SOMsoil to increase SOM
Bay-Friendly Landscaping: 7 Principles for Landscaping Sustainably - June 7, 2007
California Water Efficient California Water Efficient Landscape OrdinanceLandscape Ordinance –– AB 1882AB 1882
Requires DWR to develop updated Model ordinance by Jan Requires DWR to develop updated Model ordinance by Jan 2009 (OAL reviewing, final approval due this week) 2009 (OAL reviewing, final approval due this week)
Jan 2010: Each local agency is required by state law to Jan 2010: Each local agency is required by state law to 1.1. adopt model or adopt model or 2.2. Adopt their own ordinance that is as strong as or Adopt their own ordinance that is as strong as or
stronger than the modelstronger than the model3.3. Or model ordinance would take effectOr model ordinance would take effect
Applicable to:Applicable to:•• New and rehabilitated >2500 sq. feet New and rehabilitated >2500 sq. feet •• Public and privatePublic and private•• Commercial, institutional, industrial & MFCommercial, institutional, industrial & MF•• SF homes designed and installed by developerSF homes designed and installed by developer•• Some exceptionsSome exceptions
California Water Efficient California Water Efficient Landscape OrdinanceLandscape Ordinance
•• A Soil Management Plan is a key component of A Soil Management Plan is a key component of the new model ordinancethe new model ordinance
•• Soils testing will be required for pH, texture, Soils testing will be required for pH, texture, infiltration rate, organic matter content, soluble infiltration rate, organic matter content, soluble slats and sodiumslats and sodium
•• StopwasteStopwaste is preparing a model ordinance that is preparing a model ordinance that also recommends the use of compost as also recommends the use of compost as amendment, and other Bayamendment, and other Bay--Friendly practices Friendly practices to increase moisture holding capacity of soils to increase moisture holding capacity of soils
Bay-Friendly Landscaping: 7 Principles for Landscaping Sustainably - June 7, 2007
Compost isCompost is……the product of controlled the product of controlled decomposition and decomposition and introduces over 1 billion introduces over 1 billion microorganism per microorganism per teaspoon to the soil teaspoon to the soil
Mulch isMulch is……any material spread over any material spread over the surface of the soil to the surface of the soil to control weeds and retain control weeds and retain moisture moisture
Benefits of CompostBenefits of Compost
Incorporating compost:Incorporating compost:
•• Improved water holding Improved water holding capacitycapacity
to the soilto the soil•• Prevents soil compaction Prevents soil compaction •• Improves soil structureImproves soil structure•• Increases infiltrationIncreases infiltration•• Reduces crusting, erosion & Reduces crusting, erosion &
runoffrunoff
Landscape StandardsLandscape Standards
BayBay--Friendly Landscape Friendly Landscape Guidelines: Guidelines: Sustainable Sustainable Practices for the Practices for the Landscape Landscape ProfessionalProfessional
BayBay--Friendly Friendly Gardening: from your Gardening: from your backyard to the Bay backyard to the Bay for for Residents Residents
14 Union City Alvarado Blvd Medians* Also received a Green Building Grant from StopWaste.Org
Bay Street Plaza, EmeryvilleBay Street Plaza, Emeryville
Project Overview:Project Overview:
• Landscape Architect: April Philips Design Works, Inc
• High-visibility retail plaza • Size: 19,261 square feet
or .44 acre• Before construction 99%
impervious surface, after construction 30% impervious surface
Source: April Philips Design Works, Inc
Bay-Friendly Landscaping: 7 Principles for Landscaping Sustainably - June 7, 2007
Bay Street Plaza, EmeryvilleBay Street Plaza, Emeryville
•• Existing soil was Existing soil was unsuitable unsuitable
•• Imported soil for raised Imported soil for raised landscape planters landscape planters
•• Tested import and Tested import and amended with organic amended with organic compost and other compost and other natural fertilizersnatural fertilizers
•• Specified 3Specified 3”” of compost and of compost and 33”” of mulchof mulch
OhloneOhlone College, NewarkCollege, Newark
Project Overview:Project Overview:
• Landscape Architect: CMG• Architect: MBT
Architecture• Completed: January 2008• LEED Gold• First “green” community