Water Use and Efficiency Branch The Model The Model Water Efficient Water Efficient Landscape Ordinance Landscape Ordinance Landscape Graphic Courtesy of Sonoma County Water Agency, Ali Davidson Landscape Architect David Bunnett Illustrator
Water Conservation in Landscaping Act � AB 325 1990 � AB 2717 2004 � Landscape Task Force 2005 � AB 1881 2006
Major provisions required by AB 1881 � Minimize overspray and runoff � Soil assessment and � Group plants in hydrozones amendment (if amendment is � Well-adapted plants indicated) � Maximum Applied Water � Grading to promote healthy Allowance (MAWA) water plant growth budget based � Mulch is required in most � Increase opportunities for plantings stormwater retention � Require use of recycled water � irrigation scheduling based on where available CIMIS or other reliable ETo � Education of water users data or soil moisture sensors � Fire prevention � Sustainable landscape maintenance practices
Applicability for New and Rehabilitated � Landscapes that require a building or landscape permit, plan check or design review and are: � 2500 sq. ft or more (landscape area) � public agency (parks, schools, city properties) � private development (retail, industrial, commercial properties) � developer-installed single family and multi-family (master-planned communities) � Does not require retrofits
Applicability for New SFH (owner provided) � 5000sq ft. or more (landscape area) � homeowner-provided (DIY or contractor) single-family and multi-family � Does not require retrofits
Statewide Application � Water Budget approach based on local climate � Eureka � Red Bluff � Palm Desert
Local ETo x Landscape Area X ET Adjustment Factor (0.7) x 0.62= gallons of water CIMIS
MAWA � Eureka 2000sq.ft. x 0.7 x 32.9” x 0.62= � 28,557 gallons � Red Bluff 2000sq.ft. x 0.7 x 57.0” x 0.62= � 49,476 gallons � Palm Desert 2000sq.ft. x 0.7 x 66.5” x 0.62= � 57,722 gallons
ET Adjustment Factor (ETAF) in the Water Budget � 0 .7 ETAF for projects installed after 01/01/10 � 1.0 ETAF for Special Landscape Areas � Recreational turf projects (parks, golf courses, ball fields) � projects irrigated with recycled water � Edible landscapes � 0.8 ETAF for existing projects larger than one acre and installed before 01/01/10
Soil Management Report Soil Management Report � Laboratory analysis � Submit laboratory report to � local agency � landscape and irrigation designers � Mass grading � Submit with Cert. of Completion � No mass grading � Submit with LDP
Landscape Design Plan Landscape Design Plan Drawing will identify hydrozones, plant types, hardscapes and other features.
Mulch � 2”of mulch required in most planting areas � Use stabilizing mulching products on slopes
Stormwater BMP’s encouraged as Landscape Design Features � Less runoff � Cleaner runoff � Shorter irrigation season � Retains pulse flows and flooding � Increase Habitat � Lower maintenance
Rain Gardens and Catchment
Irrigation Design Plan � Controllers that use evapotranspiration or soil moisture data � Pressure regulation � Reduction � Boosting
Irrigation Design Plan � 24” setback � Slopes � Hydrozones � Shut off sensors
24” setback and hardscapes � Overhead irrigation is not permitted within 24” of non-permeable surface unless… � Alternate design or technology to prevent runoff � Overspray or runoff flows into the landscaping (in parks, etc.)
Dry Season irrigation runoff carries fertilizers and pesticides directly to creeks and rivers
Swing Joints � Prevent riser damage in traffic areas � Pedestrians � Bikes � Golf carts
Irrigation on Slopes � Precipitation rate of 0.75 inches per hour or less � Check valves to prevent low head drainage
Narrow planting areas � Areas less than 8’ wide including turf must be irrigated with subsurface or low volume irrigation � Old ordinance limited to 10’ or wider
Irrigation Scheduling Irrigation Scheduling Parameters Parameters Actual irrigation schedules shall be controlled by controller SUBMIT INPUTS Automatic controllers must Self-Adjusting Controller use evapotranspiration or soil moisture sensing data
Maintenance Schedules Maintenance Schedules Irrigation and Landscape •Irrigation repair and maintenance •Aeration of turf •Weeding •Replenish mulch
Irrigation Audit Report Irrigation Audit Report � Certified Irrigation Auditor � Ensures irrigation system functions as designed � Is the schedule appropriate? � time of year � plant types � irrigation method
Certification of Installation � Certified that the landscape was installed per the approved Landscape Documentation Package signed by: � Landscape Designer or.. � Irrigation Designer or.. � Landscape Contractor
Water Waste Prevention � California Constitution Section 2 Article X— the right to use water does not extend to waste or unreasonable use or unreasonable method of use � All landscapes prohibited from wasting water
Water Waste Prevention � Local agencies shall prohibit runoff, low head drainage and overspray. � Penalties for violation of these prohibitions shall be established locally.
What does this mean for landscape pro’s? These are opportunities. � No Runoff � Erosion control � Stormwater retention � Soil Management � Maintenance Schedules (replenishing mulch, fertilizing) � Irrigation Maintenance!
Water Budget Calculator Maximum Applied Water Allowance (MAWA) Calculations MAWA = (ETo) x (0.62) x [0.7 x LA) + (0.3 x SLA)] Evapotranspiration Rate Landscape Area Special Landscape Area Estimated Total Water Use (ETWU) Calculations ETWU = (ETo) x (0.62) x [(PF x HA/IE) + SLA] Special Evapotranspiration Rate Plant Factor Landscape Area Hydrozone Irrigation Area Efficiency
MAWA
ETWU
CIMIS Daily ETo Maps � Archived data from Feb. 2003 � 2 kilometer resolution � Can request data by geographic coordinate, zip code, or address � Available CIMIS web site, or automated email reports Spatial CIMIS
May 17, 2010
Aerial Imagery http://www.water.ca.gov/wateruseefficiency/landscapeordinance/ ftp://ftp.water.ca.gov/California_Imagery/Aerial_Imagery/2005_IR • 2005 Available now • 2009 Available soon • Must have GIS Software • FREE ! Measures the landscape area for assigning water budgets at existing landscapes
Get Landscape Area for Water Budgets
Select Landscape Area
Agencies are there to help… � DWR � State Water Resources Control Board � Department of Resources Recycling and Recovery (formerly Integrated Waste Board) � Bureau of Reclamation � NRCS � Local Water Agencies � EPA
WUCOLS Water Use Classification of Landscape Species Used to estimate the water needs of landscape plants http://www.water.ca.gov/wateruseefficiency/landscapeordinance/
Free Publications
Reach DWR on the web…. � mweo@water.ca.gov � http://www.water.ca.gov/wateruseefficienc y/landscapeordinance
Contact Information Contact Information Julie Saare-Edmonds (916) 651-9676 landscape@water.ca.gov mweo@water.ca.gov Water Use and Efficiency Branch Department of Water Resources P.O. Box 942836 Sacramento, CA 94236-0001 1-877-693-5610
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