EXCITE: Wing Tam

LA Confidential - Prop O

Wing K. Tam , P.E.

Assistant Division Manager

City of Los Angeles Sanitation

September 26, 2013

Green-Blue Infrastructures in the City of Los Angeles

“stormwater runoff as a resource”

Outline

Background / Watershed Planning •Green-Blue Infrastructures •

Rainwater Harvesting •Green Streets •

Questions •

City of Los Angeles Integrated Resources Plan

Background

Sources of untapped water…• Stormwater:Stormwater:100 MG/day (dry-weather);100 MG/day (dry-weather);> 3 BG/day (wet-weather)> 3 BG/day (wet-weather)• Wastewater: Wastewater: 300 MG/day goes to the ocean300 MG/day goes to the ocean• Groundwater:Groundwater:BG of water (contaminated)BG of water (contaminated)

Watershed Planning - Water

““provides a universal view”provides a universal view”

City of Los Angeles Water Quality Compliance Master Plan for Urban Runoff

BackgroundWatershed Planning - Stormwater

Our Mission“ “ Protect Public Health and the Environment”Protect Public Health and the Environment”

• Source control & institutional measures• Storm water capture, treatment, & reuse• Infiltration & groundwater recharge• Multi-use benefits• Community & stakeholder value• Drought tolerant landscaping• Pervious pavements & green roofs• Outreach / partnerships

Urban Runoff – IRP Approach

BackgroundWatershed Planning – Urban runoff

Strategy– Institutional Measures

• Public Outreach– Municipal Ordinances

• Green Building Ordinance• Landscape Ordinance• Low Impact Development

(LID) Ordinance– Local (on-site) Measures

• Rain Barrels• Rain Gardens

– Regional Measures• Public Projects• Green Street Standards

Manuals for Public/Private • Green Street Standard Plans

Green-Blue Infrastructures

• Solutions and Benefits• Improve water quality• Increase water supply• Reduce flooding• Save on energy use• Adapt to climate change• Enhance wildlife• Provide open space for

habitat and recreation

PUBLIC USE

FLOODPROTECTION

WATERQUALITY

HABITATRESTORATION

OPEN SPACE

WATER SUPPLY

CLIMATE ADAPTATION

JOBS


Multi-benefits – Leveraging Resources

Green – Blue Infrastructure allows for integrated funding and multiple benefitso Water Quality Compliance (Prop O) Clean-Up

Fundingo Street Improvements fundingo Water Resources fundingo Park fundingo Grants


Proposition “O”• City of Los Angeles $500 million Clean Water Bond (2004)

– Over 33 water quality, water conservation, habitat protection, and open space projects

•Low Flow DiversionsLow Flow Diversions

•BeforeBefore

•South LA Wetlands ParkSouth LA Wetlands Park

•Imperial Highway Imperial Highway Median GreeningMedian Greening

Echo Park Lake Rehabilitation Echo Park Lake Rehabilitation

Cost estimate & benefits $1 costs results in $6 to $22 of benefits expected


Economic & Job Impact

$1 investment results in $2 economic activity


Note: Water Use Efficiency and Jobs Report, 2011, by Economic Roundtable

Over 36,000 jobs created per billion invested

Over 400,000 jobs are ocean related in Los Angeles County

- $10 billion annually in wages and $20 billion in goods and services.

Over 50 million tourists annually- Over 1.5 million jobs generated

- Over $15 billion generated in Los Angeles last year

Green-Blue InfrastructuresEconomic & Job Impact

• Manuals – guidance standards• Green Streets - Converting public right-of-way

or parkway to open space for multi-benefit uses• Green Standards – institutionalizes, applies to

public and private• LID – land developments and re-developments• Rainwater Harvesting – capture and use• Water Quality Matrix – Approved by Health

Department• Stream Protection – Natural cleaning

Green Initatives

• Implemented Pilot Rainwater Harvesting Program (600 barrels and “rain gardens”)

• Followed by distributing up to 1,000 rain barrels to residences

• City and community groups implementing “rain garden” program for the San Fernando Valley and South Los Angeles, with plans for City-wide implementation.

• Rain Barrel and Rain Gardens

Rainwater Harvesting Program

TableInstallation Area Rain Barrel Rain Barrel w/

Overflow Infiltration

Ballona Creek Watershed (600 homes)

600,000 gallons(approx. 2 acre-feet)

2,200,000 gallons(approx. 7 acre-feet)

City of LA (800,000 homes) 800,000,000 gallons/

( 2,430 acre-feet)2,940,000,000 gallons

(9,012 acre-feet)

Note 2: 1 acre-foot can supply a family of 3 – 4 for one year

Note 1: These numbers are based on 1 rain barrel per home. If 2 rain barrels per home, the numbers will double.

Rainwater Harvesting ProgramEstimated Annual Volume of Captured Rainwater

•Oros Street – LA’s First Green Street Capture private and public runoff

•Riverdale Avenue – Green Streets ProgramDemonstrate and monitor Green Streets

•Elmer Avenue – Water Augmentation StudyCombined distributed and regional solution

•South Park – Ultra-urban ApplicationHope Street and Grand Ave.

Green Streets

Green Streets

•Porous Pavement – Rio del Los Angeles State Park •(aka: Taylor Yard)

•Bioretention - Sam’s Club Parking Lot

•Planter Boxes - Versailles Luxury Apartments•Oxford St, Los Angeles

•Parkway Infiltration Swale•11th St & Hope St – Los Angeles

•Cisterns - Lowe’s

•Infiltration - Costco

LIDs

•Westminster Dog Park Biofiltration

•Imperial Highway Median Greening

•Grand Ave Tree Wells

•Before

•After

•Oros Green Street Rain Gardens

•Los Angeles Zoo Green Parking Lot - Vegetated bio-swale

•North Atwater Stream Restoration and Park Expansion


Garvanza Park Rainwater Capture and Use

• Completed in March 2012

• Construction Cost: $3 Million

• Captures rainwater from 80 acre drainage area

• Diverting dry & wet weather runoff into an underground storage tank holding 1 milliongallons

• Captures water for infiltrationand use at the park

• Average volume per year ~ 50 AFY

ProjectsProjectsGreen InfrastructureGreen Infrastructure

Example Projects – South LA Wetland Park

•Before Construction

•After Construction

Penmar Stormwater Capture Project

• Phase I - Spring 2013 ($21 million)

• Phase II – 2014 (estimated - $2.8 million)

• Diverts stormwater into a 2.75 MG underground storage tank

• ~100 AFY wet and dry weather runoff for use at park and golf course

Temescal Canyon Park Stormwater BMP Project

• Phase 1 – Fall 2013 ($15m)

• Phase 2 – 2014 (~$3.7m)

• Wet weather diverted to 1.25 MG underground tank

• Up to 50 AFY of dry and wet

weather flows reusedfor irrigation

Other Runoff Management Projects

Projects currently under construction include: • Glenoaks-Sunland Stormwater Capture• Woodman Ave Median Stormwater Capture• Ed P. Reyes River Greenway• Rosecrans Recreation Center Stormwater Enhancements• Temescal Canyon Park Stormwater Capture and Use

Projects will be going to design or construction include: • Laurel Canyon Green Street and Stormwater Capture• Manchester Greenway• Broadway Green Street and Stormwater Capture• Avalon South Green Alley • Westchester Parkway Stormwater Capture• Vermont Green Street• Rory Shaw Wetlands

Conclusions• Great opportunity to meet water quality

while augmenting water supply sources

• Part of an integrated water resources solution and urban revitalization

• Leveraging resources

• Creating Jobs

• May enable to secure other funding sources

• Involvement of neighbourhoods and communities

Wing K. Tam , P.E. Assistant Division Manager

City of Los Angeles Sanitation

September 26, 2013September 26, 2013Additional Information: www.lacity.org or www.lastormwater.org

www.facebook.com/lastormwaterprogramwww.facebook.com/lastormwaterprogram

www.youtube.com/user/lastormwaterprogramwww.youtube.com/user/lastormwaterprogram

www.lastormwater.org/blog/www.lastormwater.org/blog/

EXCITE: Wing Tam

Environment

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