Low Impact Development Adjusting to the New Storm Water Paradigm
What is LID? <ul><li>A site-specific, conceptual approach to minimize the detrimental effect of hydromodification </li></u...
 
Evolution of Storm Water Treatment Three Main Phases <ul><li>Phase I: Conventional Model (pre-70’s) </li></ul><ul><ul><li>...
Progression of Legislation <ul><li>Clean Water Act of 1972 </li></ul><ul><ul><li>Set goals for all national waters to be f...
What is LID? <ul><li>Site-specific, conceptual approach of developing property to minimize the detrimental effect of hydro...
Hydrologic Cycle
Natural Infiltration
Our Mokelumne
Example of Erosion caused by Hydromodification
Natural Balance of  Erosion and Deposition After Lane (1955) as cited in Rosgen (1996)
Environmental Benefits of LID <ul><li>Cost Effective - less treatment, less conveyance, less maintenance, less fines, etc....
Functional Benefits of LID <ul><li>Treats first flush runoff </li></ul><ul><ul><li>Majority of contaminants </li></ul></ul...
Ways to Mimic Natural Hydrology <ul><li>Know your natural hydrology! </li></ul><ul><li>Soil quality improvement </li></ul>...
LID Examples
The Big Challenge - Implementation <ul><li>Statewide Quantitative Standards </li></ul><ul><ul><li>TMDLs </li></ul></ul><ul...
Current Implementation Approaches for LID <ul><li>Contra Costa County - C3 Guidebook 4 th  Edition </li></ul><ul><ul><li>I...
Recent Funding Opportunity – Proposition 84 <ul><li>Matching Grants for sustainable, long-term water quality projects whic...
New  Developments?! Where?  Will that really make a difference? <ul><li>We have to start somewhere </li></ul><ul><li>Retro...
LID Opportunities for WGR <ul><li>Expert knowledge of NPDES requirements </li></ul><ul><li>Ensuring clients with LID compl...
Closing Comments <ul><li>Unexplored Territory Ahead </li></ul><ul><li>Opportunity for Sustainable Change </li></ul><ul><li...
Thanks for Listening! <ul><li>Any Questions or Comments </li></ul><ul><li>Please call Chris @ (209) 334-5363 ext. 214 </li...
Restoring Soil Function
Soil Health
Riparian Zone
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LID Presentation

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Presented this to local private firms and city engineers regarding the upcoming LID regulations coming down the pipe...

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LID Presentation

  1. 1. Low Impact Development Adjusting to the New Storm Water Paradigm
  2. 2. What is LID? <ul><li>A site-specific, conceptual approach to minimize the detrimental effect of hydromodification </li></ul><ul><li>LID Goal - Mimic the natural hydrologic cycle </li></ul><ul><li>Site-specific – Designs will change per locale </li></ul><ul><li>Conceptual – Qualitative not quantitative </li></ul><ul><li>Approach – Needs to be addressed and included from the inception of the project </li></ul><ul><li>Development – LID requirements are currently focused exclusively on new developments and significant* redevelopments </li></ul><ul><li>Hydromodification – the unnatural redirecting of stormwater </li></ul>
  3. 4. Evolution of Storm Water Treatment Three Main Phases <ul><li>Phase I: Conventional Model (pre-70’s) </li></ul><ul><ul><li>Collect and Convey </li></ul></ul><ul><ul><li>PROBLEM: Point-source pollution, hydromodification </li></ul></ul><ul><li>Phase II: Retention Model, BMPs (80’s and 90’s) </li></ul><ul><ul><li>Flow, Volume and Source/Treatment Control </li></ul></ul><ul><ul><li>PROBLEM: Hydromodification, maintenance </li></ul></ul><ul><li>Phase III: Low Impact Design Model (2000+) </li></ul><ul><ul><li>Mimicking Natural Hydrology </li></ul></ul><ul><ul><li>PROBLEM: Adequate treatment? Flooding? Implementation? Involvement? </li></ul></ul>
  4. 5. Progression of Legislation <ul><li>Clean Water Act of 1972 </li></ul><ul><ul><li>Set goals for all national waters to be free of all discharges causing pollution </li></ul></ul><ul><ul><li>Required TMDLs for impaired watersheds </li></ul></ul><ul><li>NPDES Permits (Section 402 CWA) </li></ul><ul><ul><li>Storm Water Pollution Prevention Plan </li></ul></ul><ul><ul><li>Storm Water Management Plan </li></ul></ul><ul><ul><li>Development Standards Plan </li></ul></ul><ul><li>State Board’s Sustainability Resolution (2005-2006) </li></ul><ul><li>NPDES Permits now shifting to LID </li></ul><ul><ul><li>Contra Costa County Phase I NPDES Permit (2005) </li></ul></ul><ul><ul><li>Stockton Phase I NPDES Permit (Dec. 2007) </li></ul></ul><ul><ul><li>Upcoming statewide Phase II NPDES Permit (~ March 2009) </li></ul></ul>
  5. 6. What is LID? <ul><li>Site-specific, conceptual approach of developing property to minimize the detrimental effect of hydromodification and pollution </li></ul><ul><li>LID Goal - Mimic the natural hydrologic cycle </li></ul><ul><li>Site-specific – Designs will change per locale </li></ul><ul><li>Conceptual – Qualitative not quantitative </li></ul><ul><li>Approach – Needs to be addressed and included from the inception of the project </li></ul><ul><li>Development – LID requirements are currently focused exclusively on new developments and significant* redevelopments </li></ul><ul><li>Hydromodification – the unnatural redirecting of stormwater </li></ul>
  6. 7. Hydrologic Cycle
  7. 8. Natural Infiltration
  8. 9. Our Mokelumne
  9. 10. Example of Erosion caused by Hydromodification
  10. 11. Natural Balance of Erosion and Deposition After Lane (1955) as cited in Rosgen (1996)
  11. 12. Environmental Benefits of LID <ul><li>Cost Effective - less treatment, less conveyance, less maintenance, less fines, etc. </li></ul><ul><li>Mitigates downstream flooding, erosion and aggradation </li></ul><ul><li>Helps control water quality </li></ul><ul><li>Preserves stream base for riparian ecosystems </li></ul><ul><li>Helps recharge groundwater </li></ul><ul><li>Preserves natural temperatures in receiving waters </li></ul><ul><li>Multifunctional: landscaping, aesthetics, native vegetation, social benefits, open space use, etc. </li></ul><ul><li>Resilient and adaptable to various climates </li></ul>
  12. 13. Functional Benefits of LID <ul><li>Treats first flush runoff </li></ul><ul><ul><li>Majority of contaminants </li></ul></ul><ul><li>Treats common small/medium-size storm </li></ul><ul><ul><li>Majority of storms </li></ul></ul><ul><li>Design includes overflow for large storms </li></ul><ul><ul><li>Conventional MS4 used as back-up </li></ul></ul><ul><li>Aesthetically pleasing </li></ul><ul><li>Easy to maintain </li></ul>
  13. 14. Ways to Mimic Natural Hydrology <ul><li>Know your natural hydrology! </li></ul><ul><li>Soil quality improvement </li></ul><ul><li>Native and drought tolerant vegetation </li></ul><ul><li>Trees </li></ul><ul><li>Maximize pervious surfaces </li></ul><ul><li>Disconnect impervious surfaces from storm drain - disconnect downspouts, rain barrels, </li></ul><ul><li>Bioretention – Rain Gardens, swales </li></ul><ul><li>Green Roofs? </li></ul>
  14. 15. LID Examples
  15. 16. The Big Challenge - Implementation <ul><li>Statewide Quantitative Standards </li></ul><ul><ul><li>TMDLs </li></ul></ul><ul><ul><li>Sizes of IMPs </li></ul></ul><ul><ul><li>Regulator-based </li></ul></ul><ul><li>Local Qualitative Standards </li></ul><ul><ul><li>Permittee-based </li></ul></ul><ul><ul><li>Matching local conditions </li></ul></ul><ul><li>The Main Need – Local Involvement </li></ul><ul><ul><li>Planning Department, Engineering Firms, Construction Firms, Landscape Architects, Environmental Consultants, Field Technicians… </li></ul></ul>
  16. 17. Current Implementation Approaches for LID <ul><li>Contra Costa County - C3 Guidebook 4 th Edition </li></ul><ul><ul><li>IMPs for 4% of impervious surface </li></ul></ul><ul><ul><li>Present challenge is to find proper soil type </li></ul></ul><ul><ul><li>www.cccleanwater.org/newdevelopmentc3/ </li></ul></ul><ul><li>Santa Barbara’s New NPDES Permit </li></ul><ul><ul><li>http://www.santabarbaraca.gov/Resident/Community/Creeks/Storm_Water_Management_Program.htm </li></ul></ul><ul><li>City of Stockton’s new NPDES Permit </li></ul><ul><ul><li>Revision of SWQCCP currently in progress </li></ul></ul><ul><ul><li>Stakeholder meetings in progress </li></ul></ul><ul><ul><li>www.stocktongov.com/mud/General/stormwater/SQCCP.cfm </li></ul></ul><ul><li>Phase II NPDES Permits </li></ul><ul><ul><li>Expected March 2009 </li></ul></ul>
  17. 18. Recent Funding Opportunity – Proposition 84 <ul><li>Matching Grants for sustainable, long-term water quality projects which reduce and prevent stormwater contamination of rivers, lakes and streams </li></ul><ul><li>LID projects will take priority for grants </li></ul><ul><li>20% match for most cities and towns in delta area </li></ul><ul><li>$250,000 to $500,000 grants per project </li></ul><ul><li>2 Phases of grants </li></ul><ul><li>http://www.waterboards.ca.gov/water_issues/programs/grants_loans/prop84/index.shtml </li></ul>
  18. 19. New Developments?! Where? Will that really make a difference? <ul><li>We have to start somewhere </li></ul><ul><li>Retrofitting is too costly </li></ul><ul><li>Use of grant money may show the success of LID and direct projects to existing developments </li></ul>
  19. 20. LID Opportunities for WGR <ul><li>Expert knowledge of NPDES requirements </li></ul><ul><li>Ensuring clients with LID compliance </li></ul><ul><li>Knowledge of local soils and hydrology </li></ul><ul><li>Filling in needs to facilitate implementation </li></ul><ul><li>Geographic Informational Systems (GIS) </li></ul><ul><li>Offering compliant LID design concepts </li></ul><ul><li>Constructing and maintaining LID sites </li></ul>
  20. 21. Closing Comments <ul><li>Unexplored Territory Ahead </li></ul><ul><li>Opportunity for Sustainable Change </li></ul><ul><li>A whole new market </li></ul><ul><li>Share Ideas. Let’s go forward intelligently. Foster awareness. </li></ul><ul><li>Goal – See WGR as the Central Valley Leader in innovative LID solutions! </li></ul>
  21. 22. Thanks for Listening! <ul><li>Any Questions or Comments </li></ul><ul><li>Please call Chris @ (209) 334-5363 ext. 214 </li></ul><ul><li>WGR Southwest, Inc. </li></ul><ul><li>315 W. Pine St. </li></ul><ul><li>Lodi CA 95240 </li></ul>
  22. 23. Restoring Soil Function
  23. 24. Soil Health
  24. 25. Riparian Zone
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