The Model The Model Water Efficient Water Efficient Landscape - - PowerPoint PPT Presentation

The Model The Model Water Efficient Water Efficient Landscape Ordinance Landscape Ordinance

Water Use and Efficiency Branch

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 Group plants in hydrozones Well-adapted plants Maximum Applied Water

Allowance (MAWA) water budget based

Increase opportunities for

stormwater retention

irrigation scheduling based on

CIMIS or other reliable ETo data or soil moisture sensors

Soil assessment and

amendment (if amendment is indicated)

Grading to promote healthy

plant growth

Mulch is required in most

plantings

Require use of recycled water

where available

Education of water users 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

• r 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

• r 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 use evapotranspiration

• r soil moisture

sensing data

Self-Adjusting Controller

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]

Evapotranspiration Rate Special Landscape Area Plant Factor Hydrozone Area Irrigation 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

• 2005 Available now
• 2009 Available soon
• Must have GIS Software
• FREE !

Aerial Imagery

http://www.water.ca.gov/wateruseefficiency/landscapeordinance/ ftp://ftp.water.ca.gov/California_Imagery/Aerial_Imagery/2005_IR

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

• f 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