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Low Impact Development Guidebook

Low Impact Development Guidebook. Kent Gylfe kent.gylfe@scwa.ca.gov. Sonoma County LID. Preserving Sonoma County’s Water Resources. Traditional LID (stormwater). Traditional LID (stormwater). Integrated LID. Conservation Re-use Stormwater Management.

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Low Impact Development Guidebook

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  1. Low Impact DevelopmentGuidebook Kent Gylfe kent.gylfe@scwa.ca.gov

  2. Sonoma County LID Preserving Sonoma County’s Water Resources

  3. Traditional LID (stormwater)

  4. Traditional LID (stormwater)

  5. Integrated LID Conservation Re-use Stormwater Management Integrating Water Resource Management Strategies

  6. Sonoma County LID Program Regional Plan (County-wide) Local Agency Plans (Cities, County) A Two-Tier Approach…

  7. 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

  8. 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

  9. LID Guidebook

  10. 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

  11. 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

  12. Water Conservation Element Educational Programs Use Assessments Rebate & Incentive Programs Additional Conservation Opportunities Inventory of Existing Programs • Educational Outreach & Public Involvement • Land Use Planning & Design • Retrofits & Upgrades

  13. Water Reuse Element Recycled Water Graywater Harvested Rainwater Three Primary Sources

  14. Recycled Water Municipal Sources Highly Treated (tertiary) Multiple applications Agricultural Public Use Facilities Parks, Schools, Golf Courses

  15. 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

  16. 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/technical guidance and financing to support expanded graywater use

  17. 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

  18. 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

  19. Fundamental LID Stormwater Management Principles • Avoid hydrologic impacts • Conserve existing soils, vegetation, and hydrologic features • 3. Minimize impervious areas/maximize permeability • 4. Manage stormwater on-site through LID features

  20. Common LID Stormwater Approaches • Biofilters • Permeable Paving • Green Roofs • Rainwater Harvesting Systems • Subsurface Detention/Infiltration Strategies

  21. LID Fact Sheets • Biofilters • Permeable Paving • Green Roofs • Rainwater Harvesting Systems • Subsurface Detention/Infiltration Strategies

  22. What’s in a name? Low Impact Development Soon to be… Water Smart Development

  23. Comments or Questions?

  24. RegionalStormwater Management Groundwater Recharge Projects

  25. Water Supply Strategy

  26. 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

  27. 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

  28. 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

  29. Scoping Studies • Develop Project Objectives • Conduct Stakeholder Assessment & Coordination • Develop Conceptual Project Alternatives • Evaluate Funding Opportunities • Scope Feasibility Study • Develop Project Implementation Strategy • (Road Map) • Consultants • Sonoma Creek Watershed – ESA PWA • Petaluma River Watershed – RMC Water and Environment • Laguna-Mark West Watershed – Winzler & Kelly

  30. Comments or Questions? Kent Gylfe kent.gylfe@scwa.ca.gov

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