rain water harvesting pptmedia.iccsafe.org/annual/2015/rain-water-harvesting.pdf1 green...

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Green Infrastructure and Rain Water Harvesting

Rick Valte, P.E., LEED AP Watershed Program ManagerCity of Santa Monica

This session will discuss passive and active rain harvesting strategies implemented as part of Santa Monica’s Watershed Management Plan.

The purpose of these strategies is to limit the use of imported potable water, and to reduce water pollution associated with runoff.

The end goal is self-sufficient local water supply; clean receiving waters, the Santa Monica Bay.

Overview

Introduction to ProblemCity’s Sustainable Approach and ToolsCity ProjectsPrivate ProjectsCity Green StreetsCity’s SMURRFConclusion

Presentation Outline

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Urban Runoff – What is it?The Problem – Water Quality v. Quantity

“storm water and urban runoff are the leading source of water pollution in the Los Angeles area; storm water pollution has increased 200-700 percent during the last 20 years.”

- Southern California Coastal Water Research Project (SCWRRP)

Urban Runoff – What is it?The Problem – Water Quality v. Quantity

Stormwater has become a lethal cocktail of pollutants that now constitutes the single greatest source of water pollutants, contributing 50-60 percent of the pollutant load.

Types and Sources of Pollutants

“urban stormwater is the largest source of water quality damage in estuaries, the second largest for wetlands degradation, third largest impairment of lakes and fourth largest source of river damage.”

- USEPA

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The Watershed Level –Disrupting the Water Cycle

How water flows through our environment

The Watershed Level –Disrupting the Water Cycle

Presentation Outline Introduction to ProblemCity’s Sustainable Approach and ToolsCity ProjectsPrivate ProjectsCity Green StreetsCity’s SMURRFConclusion

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Runoff Treatment Solutions StaircaseA Paradigm Hierarchy Shift

Rainwater Harvesting

Subsurface Infiltration

Surface Infiltration

Biofiltration

Detention

Filtration

Hydrodynamic Separation

Red

uctio

nT

reat

-Rel

ease

BM

P P

refe

renc

e

High

OBJECTIVES Treat all dry weather and most wet weather urban runoff

in the City Connect land use/design to the Hydrologic Cycle,

reducing the disconnect and disruption of water flo Mimic nature; blend into the land Take proactive, watershed approach to reducing urban

runoff problems Converting IMPERMEABLE TO PERMEABLE Store urban runoff (dry/wet weather) for passive and

direct uses and pollution treatment

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Education

Prevention

Ordinances

Treatment

Maintenance

Enforcement

Funding

Tools of the Trade

Urban Runoff Pollution Mitigation Code. 7.10 SMMC –costs borne by property owner.

Stormwater Utility Parcel Fee, 7.56 SMMC –fund generator, public projects.

Clean Beaches & Ocean Special Tax. 7.64 SMMC - fund generator, public and private projects.

Sustainable City Code.AB2403 – June 2014, fee changes to votes,

include stormwater

Ordinances



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TREATMENT – Public Projects

Infiltration fields Porous surfaces Filtering Rainwater/Stormwater Harvesting & Use Federal, state, county grants – fund projects

Onsite Natural Infiltration/Filtration

Onsite retention – drivable surface

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Permeable Alley gutters (pervious concrete, gravel pave)

Permeable Paving

Green Alley Projects – 2011

B E F O R E


CONSTRUCTION

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A F T E R

Permeable Cross Gutters (pervious concrete)

Permeable Gutters (pervious concrete)

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Permeable Paving - Gutters

Use of Parkways for Surface Runoff

Parkway Infiltration

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Use of Parkways and Catch

Basins for Sub-Surface Runoff

In-Line Stormwater Harvesting



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Virginia Avenue Park

Airport Park

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Big Blue Bus Retention – Phase I

Big Blue Bus Retention – Phase II

415 Pacific Coast HWY - Retention

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Green Beach Parking Lot ProjectNetlon Advanced Turf System

Green Beach Parking Lot Project

Onsite Storage/Use - Main Library

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Multi-Family Project

Virginia Ave. Park Library

Virginia Ave. Park Library

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Future Projects – Marine Park

Los Amigos Park Project

Ozone Park Project

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Ozone Park Project



TREATMENT – Small Scale Private Projects

Infiltration fields Porous surfaces Rain barrels and cisterns

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Onsite Retention-private businesses

Drywell BMPs-single/multi- family

Infiltration Pits BMPs

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Onsite Retention

Invisible Structures

Storm Cell

Onsite Retention

Infiltrators

Onsite Retention

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Cultec Rechargers

Onsite Retention

Atlantis tanks

Onsite Retention

Eco-Rain Boxes

Onsite Retention

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Big Projects

Driveways and Runoff – drains and paving

Driveways and Runoff – drains and paving

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Driveways, Parking and Runoff –permeable paving

Rain Harvesting Rebate Program –Disconnect, Redirect

Multi-Family building

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Multi-Family building

Rainwater Harvesting

Single-Family building


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Water Fence

Water Silo

Other Cisterns

Other Cisterns

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Bicknell Avenue Green Street

• 300 foot block• 1.5 acre sub-watershed

Bicknell Avenue Green StreetBefore

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Demolition, Parkway Expansion/depressed, Curb cuts

StormTech Infiltration Chambers

Permeable Concrete Pour, Curing & Test

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Catch Basin Filter (Pre Treatment) –Sub-surface Chamber

Parkway Landscaping & Irrigation

Rain Events

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Green Street – Bicknell Avenue Green Street Project AFTER

Green Street Projects – 2011: Longfellow: Before

Green Street Projects – 2011: Longfellow: Before

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Green Street Projects – 2011: Longfellow: During Construction

6,700 gallons per rain event up to ¾”

Green Street Projects – 2011: Longfellow: After

Curb Extensions

Pavers

Ocean Park Blvd Green Street

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BEFORE


CONSTRUCTION


CONSTRUCTION

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SMURRFSanta Monica Urban Runoff Recycling Facility

• Joint Santa Monica-Los Angeles Project

• Reuse a local water resource.• Keep a pollution source out of

Santa Monica Bay.• Reduce imported water supplies

& impacts on other watersheds.• Open, walk-through facility to

educate the public.• Up to 500,000 gallons/day, ave. is

325,000• 3% of City’s daily water use.• $12 Million• $175,000 O&M

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Recommended Treatment for Reuse with Recycled Water

Screens Degritters

Membrane Filtration

Ultraviolet Disinfection

• Trash

• Grit

• Suspended Solids

• Turbidity • Pathogens

DAF

• Oil/Grease

Runoff in To

Reuse

Rotating Drum Screen

Grit Chamber

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Dissolved Air Flotation

Microfiltration

Microfiltration

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UV Radiation Channel

Finished Waterfall and Reservoir

SMURRF Educational Panels

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Artwork

Virtual Tour of SMURRF

http://www.youtube.com/watch?v=Z-9xvko9yRo&safety_mode=true&persist_safety_mode=1&safe=active

SEARCH: “virtual SMURRF

tour”



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American Rainwater Catchment Systems Association, www.ARCSA.org is the national organization with expertise in technology, standards and codes to assist in your work.

Its mission (www.ARCSA.org) is to promote sustainable rainwater harvesting practices to help solve potable, non-potable, stormwaterand energy challenges throughout the world.

Provides workshops for training on harvesting systems. Collaborates on writing standards and codes for plumbing,

treatment systems and water quality standards. Members include academia, government and business, all critical

stakeholders working together to promote this watershed management strategy.

The City of Santa Monica through its sustainable watershed management program is leading the way, demonstrating solutions.

Promoting Widespread Implementation

(310) [email protected]

(310) [email protected]

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