Real-time Control: The Next Generation of Smart Green Infrastructure Maine Stormwater Conference 2015

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1 Real-time Control: The Next Generation of Smart Green Infrastructure Maine Stormwater Conference 2015 Andrea Braga, P.E., CPESC, Senior Engineer, Geosyntec Consultants, Inc. 16 November 2015

2 Outline Passive and Active Stormwater Management Real-Time Controls and Monitoring Smart GI Applications and Performance Results

3 Passive Stormwater Control Uncontrolled Discharge Peak Flow Target Typical Discharge Rainfall 0 Time 3

4 Example of Intelligent Discharge Uncontrolled Discharge Typical Discharge Post-Event Controlled Discharge Peak Flow Target Rainfall 4 0 Valve is closed, no discharge Time

5 Example of Intelligent Discharge Uncontrolled Discharge Pre-Event Controlled Discharge Rainfall 0 Time 5

6 Active Control System - OptiRTC A cloud-based suite of computing services that provides automated real-time control and data management solutions for a wide range of environmental applications.

7 Platform Overview Internet Based Weather Forecast or other internet data sources (Web service API) Azure Tables/Blobs User Interface Web Services and User Dashboards Data Logging and Telemetry Solutions OptiRTC Data Aggregator and Decision Space Field Monitoring and Control (Sensors, Gauges, and Actuators) Rapid Deployment Field Kits With Wireless Sensors Alerts Tweet SMS Voice Autodial

8 Smart System Control Logic If X then Y If a storm is predicted open valve This will lower water surface elevation in system during dry weather When the rain begins close valve This will hold water in the system during wet weather Otherwise retain water level in system to: hold water for potable reuse maximize infiltration maximize water quality

9 Smart Stormwater Control Advanced rainwater harvesting Predictive retention and detention systems using precipitation forecasts Controlled under drain bioretention Active porous pavement systems Active blue and green roofs

10 Advanced Rainwater Harvesting System Concept Goal: Storage for both effective wet weather control and on-site use

11 Advanced Rainwater Harvesting System Conowingo Elementary School System Description Cistern installed to store runoff and make available onsite Web-based precipitation forecasts are used to automatically control releases to downstream BMPs (e.g., infiltration/bioretention) or MS4

12 Conowingo ARH Dashboard System Behavior Week of 5/30/2015

13 Conowingo ARH Dashboard System Behavior Week of 5/30/2015

14 How much of a difference can these systems make?? Advanced Rainwater Harvesting System from NC State install: Smart System Passive System Overall Wet Weather Volume Reduction Mean Peak Flow Reduction 86% 21% 93% 11% Overflow Frequency 18% 58% *DeBusk, 2013

15 DC Firehouse Active Cisterns

16 Advanced Rainwater Harvesting: EH #3 Rainfall Max Cistern Capacity Release to Combined Sewer 16

17 Advanced Rainwater Harvesting: EH #25 Rainfall Overflow to MS4 Max Cistern Capacity On-site Reuse 17 17

18 Technology Application: Smart Detention/Retention/Flood Control Retrofits

19 Brooklyn Botanical Garden Smart Control for CSO Mitigation

20 Existing Water Circulation System City/Reservoir Water Input Outflow to Combined Sewer

21 Proposed Water Recirculation System City/Reservoir Water Input Biofilter Sediment Forebay Controlled Outflow to Combined Sewer Recirculation System Biofilter

22 Water Garden: Water Level Control Bank Full Low Low Water Maximize volume available for stormwater storage

23 Pond/Flood Control Retrofit Outlet Control Structure Retrofit for Water Quality Enhancement Balance Flood Control and Water Quality Dray Pond Retrofit

24 Technology Application: Controlled Underdrain Bioretention

25 Controlled Bioretention Underdrain Bioretention site rendering Maximize Infiltration, minimize bypass, and achieve water quality targets

26 Technology Application: Active Porous Pavement

27 Actively Controlled Porous Pavement City of Omaha, NE

28 Slide Gate Control plate height is variable and serves as overflow when closed Control Box Pressure Transducer Actuator Trash Screen 28 Control Plate with Actuated Slide Gate (Open)

29 Technology Application: Active Green Roofs and Blue Roofs

30 Active Green Roof, Pennsylvania Active Irrigation Valve Green Roof Project Site

31 Dashboard SAP Green Roof

32 Dashboard SAP Green Roof

33 Summary and Closing Thoughts Smart systems provide the opportunity to: to control the way systems function based on the event it is managing at any given time to change the ways we are managing stormwater in real-time which may become more important for climate change resiliency to implement low cost retrofits on existing infrastructure for improved performance to use low cost, reliable, and highly functional sensors and sensor platforms to ensure systems are functioning as designed and to inform maintenance on GI systems