Lid Intro Nw
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The document discusses low impact development (LID) techniques that aim to minimize impacts of land development on water systems and replicate natural hydrologic functions. It describes LID as a hydrology-based approach that reflects ecosystem functions through decentralized stormwater management practices. It provides examples of LID techniques like conservation plans, minimizing impervious surfaces, maintaining natural flow paths, and using integrated practices like bioretention and permeable surfaces.
![Figure 2: Showing the lack of mitigating influence of structural BMPs on biologic conditions in Puget Sound lowland streams (Horner and May, 2000). Note, “w/BMPs” refers to structural facilities only. [Honer / May 2001]](https://image.slidesharecdn.com/lidintronw-1221057642898532-8/85/Lid-Intro-Nw-16-320.jpg)
Lid Intro Nw
- 1. Low Impact Development Introduction Moving towards Technology Based Landscapes, Streetscapes, and Infrastructure Low Impact Development Green Infrastructure Green Highways Partnership
- 2. Low Impact Development (LID) Hydrology based distributed site design approach Reflects landscape and ecosystem function Uniform or decentralized Replicate function instead of mitigation Multi-functional landscapes and infrastructure Multiple regulatory and resource objectives
- 3. CHAPTER 26 CFR - WATER POLLUTION PREVENTION AND CONTROL SUBCHAPTER I - RESEARCH AND RELATED PROGRAMS § 1251 . Congressional declaration of goals and policy. (a) Restoration and maintenance of chemical, physical and biological integrity of Nation's waters; national goals for achievement of objective. Ecosystems Based Technology-forcing Comprehensive Research Total Maximum Daily Load
- 4. Origins Initiated by Prince George’s County in mid 1990’s LID Center formed 1998 EPA LID Manual 2000 DOD LID Manual 2004 Subsequent PWTB NCHRP Research 2006 Federal State and Local Programs Regulatory and Go Green!!
- 5. Get Ready! LID techniques will be the foundation of EPA Green Infrastructure Strategy Federal Energy Legislation (438) Highway Reauthorization Everything is going green!
- 6. Defining LID Technology Conservation (Watershed and Site Level ) Minimization (Site Level) Strategic Timing (Watershed and Site Level) Integrated Management Practices (Site Level) Retain / Detain / Filter / Recharge / Use Pollution Prevention
- 7. 1. Conservation Plans / Regulations Local Watershed and Conservation Plans Forest (Contiguous and Interior Habitat) Streams (Corridors) Wetlands Habitats Step Slopes Buffers Critical Areas Parks Scenic Areas Trails Shorelines Difficult Soils Ag Lands Minerals Large to Small Scale!
- 8. 2. Minimize Impacts Minimize clearing Minimize grading Save A and B soils Limit lot disturbance * Soil Amendments Alternative Surfaces Reforestation Disconnect Reduce pipes, curb and gutters Reduce impervious surfaces
- 9. 3. Maintain Time of Concentration Open Drainage Use green space Flatten slopes Disperse drainage Lengthen flow paths Save headwater areas Vegetative swales Maintain natural flow paths Increase distance from streams Maximize sheet flow
- 10. 4. Storage, Detention & Filtration “LID IMP’s” Uniform Distribution at the Source Open drainage swales Rain Gardens / Bioretention Smaller pipes and culverts Small inlets Depression storage Infiltration Rooftop storage Pipe storage Street storage Rain Water Use Soil Management**
- 11. 5. Pollution Prevention Maintenance Proper use, handling and disposal Individuals Lawn / car / hazardous wastes / reporting / recycling Industry Good house keeping / proper disposal / reuse / spills Business Alternative products / Product liability 30 - 40% Reduction in N&P Kettering Demonstration Project
- 12. Where is all this going Hydromod Watershed Based Approaches Drivers and Implementation
- 13. Green Infrastructure Use of community public and private open space for integrated network of stormwater facilities. Non-structural and structural Proliferate micro-scale techniques in an effective manner throughout the watershed
- 14. Green Highways Partnership The Green Highways Partnership (GHP) is a voluntary, public/private initiative integrated planning : watershed! regulatory flexibility market-based rewards “ Better than Before”
- 15. Imperviousness & Threshold Theories It’s not so simple - very complex!
- 16. Figure 2: Showing the lack of mitigating influence of structural BMPs on biologic conditions in Puget Sound lowland streams (Horner and May, 2000). Note, “w/BMPs” refers to structural facilities only. [Honer / May 2001]
- 17. A few Issues! How we see the world (without the meds) Political and Economic Drivers Institutional (Been there done that) Technology and Materials
- 18. How well do we maintain the ecological integrity (functions) of aquatic systems (small streams)? Chemical Variables Flow Regime Habitat Structure Energy Sources Biotic Factors Nutrients Temperature D.O. pH Turbidity Organics Toxics Disease Reproduction Feeding Predation Competition Sunlight Nutrients Seasonal Cycles Organic Matter 1&2 Production Canopy Siltation Gradient Substrate Current Instream Cover Sinuosity Width/Depth Channel Morphology Soils Stability Riparian Vegetation Velocity Frequency Runoff Evaporation Ground Water Flow Duration Rain Intensity Scale / Spatial / Temporal / Species Ecosystem Integrity
- 19. Oak Ridge National Laboratory
- 20. Oak Ridge National Laboratory
- 21. Capacity Traditional Urban Drainage Sustainable Urban Drainage Stahre, 2006 Water Quality Capacity Amenity The Good Old Days!
- 24. Conventional Ultra-Urban Retrofit Space Cost Inefficiency Pollution Maintenance Safety Creating Blackholes of Infrastructure Stormwater Competes With Other Programs
- 25. Stormwater regulations in a highly impervious world Why do we need LID Now? Precision Scale Technology
- 27. MUSIC Monash U
- 28. Stormwater Wastewater Drinking Water Decentralized Controls are Holistic and Watershed Based
- 29. N 2 SANDY SOIL MEDIUM MULCH RAINFALL RUNOFF RUNOFF NO 3 AIR NH 3 PARTICULATES DRAIN INFILTRATION NH 4 METALS , NUTRIENTS BIOLOGICAL FIXATION EVAPOTRANSPIRATION DENITRIFICATION ADSORPTION VOLITILIZATION PLANT MATERIALS NO 2 AMMONIFICATION NITROGEN CYCLE FOR BIORETENTION RECHARGE DENITRIFICATION NITROGEN FIXATION
- 30. PICP Open-graded base s (optional) dog SMOG HEAT/ LIGHT RAINFALL ET
- 31. Green Strategies Bioretention Permeable Walks Reforestation Soil Amendments
- 32. using lid to reduce inflow to combined sewer systems Washington, DC Award winning Barracks Row 2 nd Avenue SEA Street. Photo courtesy of Seattle Public Utilities. Green Factor Rating Systems Seattle, WA Context Sensitive Solutions
- 34. Industry Recognized Standards Builder/Developer/Institution Land Use Economic and Design Requirements Local Community Codes/Ordinances and Watershed Requirements Localized Sustainable Development LID Fits with all current rating systems! Its good business!