www.sonomacountywater.org low impact development guidebook kent gylfe [email protected]
TRANSCRIPT
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
