www.sonomacountywater.org low impact development guidebook kent gylfe kent.gylfe@scwa.ca.gov

www.sonomacountywater.org

Low Impact DevelopmentGuidebook

Kent Gylfekent.gylfe@scwa.ca.go

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Sonoma County LID

Preserving Sonoma County’s

Water Resources

Traditional LID (stormwater)

Traditional LID (stormwater)

Integrated LID

Conservation

Re-use

Stormwater Management

Integrating Water Resource Management Strategies

Sonoma County LID Program

Regional Plan (County-wide)

Local Agency Plans (Cities, County)

A Two-Tier Approach…

Regional Plan

Provide broad parameters to guide and support development and implementation of Local Plans

Identify an array of potential LID measures

Provide contemporary solution alternatives

Localized Plans

Prepared by Local Land Use Planning Entities Guided by Regional Plan Parameters Flexible to provide local identification of:

Target offset goals

Methods to achieve goals Developers submit LID project plan

Utilize Implementation Templates

Quantify Water Saving Factors Allow off-site mitigation Comply with NPDES requirements

LID Guidebook

Water Conservation Element

EPA’s Water Sense and Energy Star Programs Urban Water Management Act Model Water Efficient Landscape Ordinance California Water Plan

Integrated Regional Water Management Program

CUWCC CALGREEN

National & statewide initiatives and efforts

Water Conservation Element

CALGREEN• First Statewide Green Building Code• To be adopted into 2010 building code updates• Residential

– Requires a 20% reduction in indoor water use– Requires weather or moisture based controllers for outdoor use

• Commercial– Requires a 20% reduction in indoor use– Separate indoor/outdoor meters, water budget and weather-based controllers for outdoor use

Water Conservation Element

Inventory of Existing Programs

Educational Outreach & Public Involvement Land Use Planning & Design Retrofits & Upgrades

Water Reuse Element

Three Primary Sources

Recycled Water

Recycled Water

Expanding storage and distribution infrastructure Dual plumbing in new development Increased public outreach and education On-site treatment and reuse for CII developments

Additional Recycled Water Opportunities

Graywater

Water that flows out of bathroom sinks, showers,

And laundry equipment.

Past: restrictive building codes, many illegal systems

Present: Aug 09 code changes allow for simpler systems

and unpermitted clothes washer systems

Future: Local regulations and outreach/technicalguidance and financing to support expanded graywater

use

Rainwater Harvesting

• Present: – Rainwater

harvesting rebates from City of Santa Rosa

• Future:– Further

outreach/technical guidance to support expanded rainwater harvesting Rainwater harvesting conducted at the Occidental Arts and Ecology

CenterPhoto: OACETimes

Stormwater Element – NPDES Permit

New Phase 1 Municipal Stormwater Permit

•Issued October, 2009 by NCRWQCB (Order No. R1-2009-0050)

•Co-permittees: SCWA, County, Santa Rosa

•Stormwater LID guided by permit requirements

•LID manual required by October, 2011

•Prepared to benefit Phase 2 communities also

Fundamental LID Stormwater Management Principles

1. Avoid hydrologic impacts

2. Conserve existing soils, vegetation, and hydrologic features

3. Minimize impervious areas/maximize permeability

4. Manage stormwater on-site through LID features

Common LID Stormwater Approaches

Biofilters

Permeable Paving

Green Roofs

Rainwater Harvesting Systems

Subsurface Detention/Infiltration Strategies

LID Fact Sheets

Biofilters Permeable Paving Green Roofs Rainwater Harvesting Systems Subsurface Detention/Infiltration Strategies

What’s in a name?

Low Impact Development

Soon to be…

Water Smart Development

www.sonomacountywater.org

Comments or Questions?

www.sonomacountywater.org

RegionalStormwater Management Groundwater Recharge Projects

Water Supply Strategy

Detention Concepts

Stormwater Detention 100-yr downstream flood protection

Groundwater Recharge Along alluvial fan deposits

Multiple benefits Open Space & Parks

Trails & Public Access

Stream Restoration

Habitat Enhancement

Sediment Capture

Water Quality

Channel Concepts

Channel widening Bypass channel

Along permeable soil areas

Along historic channels

Multiple benefits Flood Reduction

Groundwater Recharge

Habitat Enhancement

Bank Stabilization

Water Quality

Key Project Objectives

Achieve Measurable Flood Control and GW Recharge Benefits Having regional effect

Maximize Additional Benefits to meet Funding Objectives Proposition 84 and 1E

Build Collaborative Partnerships with Multiple Project Proponents Stakeholder assessments

Scoping Studies

Consultants Sonoma Creek Watershed – ESA PWA

Petaluma River Watershed – RMC Water and Environment

Laguna-Mark West Watershed – Winzler & Kelly

www.sonomacountywater.org

Comments or Questions?

Kent Gylfekent.gylfe@scwa.ca.go

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