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ASCE/EWRI LID - Marcus Quigley

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  • 1. New Directions in Real-Time and Dynamic Control for Combination Rainwater Harvesting and Low Impact Development Management Systems Marcus Quigley - Geosyntec Consultants
  • 2.
    • What roles can and should technology play in addressing specific urban water control problems?
    • Can passive approaches achieve optimal solutions given the realities of the built environment?
    • What could we do with dynamic controls?
    • What is the state of the art?
    The Big Picture
  • 3.
    • Hardware
      • Programmable Logic Controllers
        • Commercial Off the Shelf (COS) Systems
      • Application Specific Designs
        • Microcontrollers
        • Single Board Computers
    • Capabilities
    • Communications (IP Based)
    • Costs
      • Decreasing Rapidly (Processors <$40, Full Controllers <$100)
    • Obsolescence
      • Avoid Creating Legacy Systems
    Control Technology – Where Are We?
  • 4. Real-Time Tide Gate Retrofit for Salt Mash Restoration Patent # 60/850,600 and 11/869,927
  • 5. Application Specific Designs
    • Processor/Controller
      • 32-bit ARM 7
        • 6 x 10 bit A/D I/O
        • 1 x 10 bit D/A I/O
        • 31 Digital I/O channels
        • 5000 lines of code
        • 10Mb Ethernet
        • Built in web server
        • Embedded compiler
        • <1 W power consumption
    • Cost
      • <$40
    • Rapid prototyping of daughter boards
    • Other Systems – Single Board Computers
  • 6.  
  • 7. Harvesting Controller Prototype 5” 7”
  • 8. Why Should I Consider RTC?
    • I am a Water Resources Engineer
    • What could possibly make me want to revisit those painful undergrad semesters spent on circuits?
    • Hasn’t all this been done before?
  • 9. Examples of What Can We Accomplish
    • Hydrology
      • Pre-development hydrograph matching
        • Hydromodification
      • Site level CSO dynamic control
    • Reuse
      • Combination detention/reuse/harvesting facilities
    • Water Quality
      • Adaptive plug flow detention time optimizations
    • Scale Issues
      • Site level systems acting at watershed scales
    • Predictive Management
      • Integrate internet accessible sources into operational decisions (e.g., forecasts)
  • 10. The Tools
    • Distributed System Designs
      • Scalable
      • Integrate/network systems
    • Embedded Models (VS-SWMM)
      • Runoff block calculations
      • Internet rainfall data source or on-site
    • On-board compilers
    • Integrated web servers
    • IP communications
  • 11. Hydromod
  • 12. Effective Work Index (W) Range of Geomorphically Significant flows Characteristics of Bed and Bank Materials  c  bi Stream Flow  c Normal Dry Weather Flow Level
  • 13. Erosion Potential (Ep) Post-Urban Pre-Urban Work Done Time Shear Stress  c
  • 14. Concept behind flow duration control standard Pre vs. Post-Development Flow Flow Bins Frequency (counts) Pre-Development Flows Post-Development Flows Post-Development Flows with Duration Control Flow Bins Frequency (counts) Matching Flow Duration Q c Q c
  • 15. Flow-Duration Example 1 (Orange County, Gobernadora Canyon)
  • 16. Flow-Duration Example 2 (Orange County, Chiquita Canyon)
  • 17. What would be ideal?
    • Hydrograph matching
    • Even better - model matching
      • Arbitrary watershed characteristics
      • Embedded model
      • Enables adaptive management
    • VS-SWMM
      • Use desktop Model input files
      • Same algorithms
      • Significant permitting advantages
  • 18. On-Site CSO and Reuse and Combined Detention/Harvesting
  • 19. Tank Operation Example SCS 10-Year 24-Hour Event
  • 20. SCS 10-Year 24-Hour Level 4 Retention Storage Level 6 0:00
  • 21. 6:45 Retention Storage Level 4 Level 6 SCS 10-Year 24-Hour
  • 22. Retention Storage Level 4 Level 6 8:35 SCS 10-Year 24-Hour
  • 23. Retention Storage Level 4 Level 6 12:00 SCS 10-Year 24-Hour
  • 24. Retention Storage Level 6 Level 4 13:00 SCS 10-Year 24-Hour
  • 25. Level 6 Level 4 Retention Storage 18:40 SCS 10-Year 24-Hour
  • 26. Level 6 Level 4 Retention Storage 21:05 SCS 10-Year 24-Hour
  • 27. Tank Operation Example “Large” Storm
  • 28. “ Large” Storm 7/19/1988 12:00 Retention Storage Level 6 Level 4
  • 29. 7/19/1988 20:50 Retention Storage Level 6 Level 4 “ Large” Storm
  • 30. 7/19/1988 22:50 Level 6 Level 4 Retention Storage “ Large” Storm
  • 31. 7/20/1988 2:10 Level 6 Level 4 Retention Storage “ Large” Storm
  • 32. 7/20/1988 7:50 Level 6 Level 4 Retention Storage “ Large” Storm
  • 33. Tank Operation Example “Small” Storm
  • 34. “ Small” Storm 3/3/1988 14:20 Level 6 Level 4 Retention Storage
  • 35. 3/3/1988 17:45 Level 6 Level 4 Retention Storage “ Small” Storm
  • 36. 3/3/1988 19:45 Level 6 Level 4 Retention Storage “ Small” Storm
  • 37. 3/3/1988 22:20 Level 6 Level 4 Retention Storage “ Small” Storm
  • 38. Conventional Harvesting System Detention/Infiltration System Harvesting System Infiltration Roof Runoff Site Impervious Runoff Irrigation Stream
  • 39. Combination Detention/Infiltration/Harvesting System Infiltration Roof Runoff Site Impervious Runoff Irrigation Stream Controlled Valves Tight Tank
  • 40.
    • What roles can and should technology play in addressing specific urban water control problems?
    • Can passive approaches achieve optimal solutions given the realities of the built environment?
    • What could we do with dynamic controls?
    • What is the state of the art?
    Revisiting the Big Picture
  • 41. New Directions Consumer Behavior Modification Optimization
  • 42. Ambient Information Systems Goal Information Conveyed to Individual Target Outcomes Reduce Consumptive Use Waste Individual feedback on instantaneous and/or monthly cumulative water use, water pricing data, and/or system demand. Information regarding irrigation consumption best practice based on weather and/or climatic data. Indicating and alerting individuals to changes in local regulatory actions relative to consumptive use such as irrigation bans. Reductions in consumptive use and changes in timing of use as a result of feedback and awareness of impacts. Optimize Storm Water Control Usage Information on how to optimize use of storm water controls that require individual participation (e.g., rain barrel, blue roof, or cistern management). Optimal use of Rain Barrels or other controls which require operator control and decision making (e.g., drain or leave full) for volume control in urbanized areas. Reduce CSO Impacts Information regarding receiving water quality and CSO status in combined sewer areas. Consumptive use changes based on direct impacts on receiving waters. These could include but are not limited to timing or other decisions about consumptive use and decisions about waste water quality (e.g., what do I send down the drain at a given time).
  • 43.  
  • 44. Thank You!

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