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Adaptive Stormwater Management using Cloud-Based Technology for a Water and Cyber-Resilient Future
Villanova Urban Stormwater PartnershipStormwater Management Symposium 2019
Kaitlin Vacca, PhD, PEOpti RTC, Inc
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Stormwater Management Objectives
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Flooding
More frequent flooding events due to changing patterns of precipitation –property damage and public safety
concerns
770 combined sewer communities in the US, many of which have obligations
under the Clean Water Act to reduce CSOs (ex: Philadelphia; Kansas City,
MO)
7,450 Municipal Separate Storm Sewer System (MS4) communities in the US with water quality permit requirements
(ex: Chesapeake Bay counties)
Combined Sewer Overflows Water Quality
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Traditional Infrastructure Project Lifestyle
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Cloud Platform for Smart Stormwater ManagementContinuous Monitoring
Adaptive Control
Visibility and Insight
Trust and Security
OPTI PLATFORM
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● COMPETING GOALS & OBJECTIVES● CHANGING CLIMATE● UNKNOWN WATERSHED
PARAMETERS● UNPREDICTABLE DESIGN STORMS
DESIGN
How can we leverage technology to ensure a future of water resiliency?
Water & Cyber Resiliency
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Pond 1 - Ellicott City, MD
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Drainage Area = 48.11 acImpervious Area = 27.99 ac
Designed for Maximizing Water Quality Credits
Pre-Opti WQ Credit = 14 ac
Post-Opti WQ Credit = 26 ac
Located in Ellicott City Watershed - flood control desired
Competing Stormwater Objectives
Water Resiliency: Adaptivity in a Changing Environment Pond 1
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Water Resiliency: Adaptivity in a Changing Environment
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Adapt to multiple goals: flood mitigation and water quality
Pond 1
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Pond 2 - Philadelphia, PA
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Water Resiliency: Adaptivity in a Changing Environment
Known:- 64 acres drainage area- 11.36 acres impervious
(on-site and off-site)- 0.33 cfs baseflow - Irrigation volume required- Built 50+ years ago- Flows into a CSO
Pond 2
Passive/Static Sizing:- Size infrastructure for 1.5 inch
storm over IA- Required Storage Volume =
61,855 CF- Manage flow over entire DA
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Water Resiliency: Adaptivity in a Changing Environment
August 2018, Passive (not controlled by the Opti valve), 0.96 in storm over 3.5 days
Pond 2
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Water Resiliency: Adaptivity in a Changing Environment Pond 2
● Ran HydroCAD and SWMM models with known information
● Valve closed up to the 2 yr, 24 hr storm
● No overflow anticipated for storms under 1.5 inches with MAX drawdown
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Water Resiliency: Adaptivity in a Changing Environment Pond 2
Nov 2018, Adaptive (controlled by the Opti valve), 0.69 in over 8 hrs, pond overflowed spillway
Required Volume for 0.69 inch of runoff over known IA (CF) 28,453
Actual Volume Captured during 0.69 inch event (CF) 85,219
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Water Resiliency: Adaptivity in a Changing Environment
April 2019, Adaptive (controlled by the Opti valve), 0.86 in over 19 hrs, 93,104 CF available storage
Pond 2
Required Volume for 0.86 inch of runoff over known IA (CF) 35,464
Actual Volume Captured during 0.86 inch event (CF) 86,016
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Using technology for management of stormwater provides adaptability and resiliency - how do we ensure that our stormwater infrastructure remains resilient
to technology?
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● COMPETING GOALS & OBJECTIVES● CHANGING CLIMATE● UNKNOWN WATERSHED
PARAMETERS● UNPREDICTABLE DESIGN STORMS
● CHANGING FORECASTS● CELLULAR NETWORK WENT DOWN● AZURE/MICROSOFT OUTAGE● FIRMWARE UPDATE ISSUES● TOOLS FOR QUICKER DETECTION
DESIGN TECHNOLOGY
How can we leverage technology to ensure a future of water resiliency?
Water & Cyber Resiliency
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Sensors
Municipal Operators
Consulting Delivery Partners
Private Property Owners
Community Reporting
Planning Dept
Regulator Reporting
Pumps CamerasHydrology
Data Networks
Weather Forecasts
WWTP and other SCADA
Cyber Resiliency: Adaptivity to Changing Technology
Opti Cloud Trust and Security
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Cyber Resiliency: Adaptivity to Changing Technology
MECHANICAL
Civil Design:Passive Overflow
Downstream Condition Assessment
Mechanical:Battery Backups
Solar PowerOnsite Manual Control
Hardware WarrantyFail-safe Position
O&M Training
Cloud-based:Anarchic Scalability
Remote Manual ControlMicrosoft Hosted ISO 27001
Internationally Certified Data Centers Product Release Cycles and 3rd Party Security AuditFrom Fail-safe to Safe-to-fail
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Cyber Resiliency: Adaptivity to Changing Technology
● Daily cellular connectivity checks● Twice weekly site checks● Alerting for real-time monitoring
and maintenance● Platform diagnostics
Alert Information
Control Panel OfflineSystem is offline or had poor connection for more than 60 minutes
Pond Overflowing Water is discharging over the overflow weir
Persistent high water level
The water level has persisted at an undesirable high water level for too long (level and duration configurable)
Forecast Rain Event The forecast indicates an upcoming rain event (any size)
Design Storm ForecastA storm greater than the [X] year design interval is forecast to begin in [Y] hours
Excessive Valve Deviation
The target and measured value states are more than 5% different
Manual Operation Mode
Opti’s automatic controls of the pond have been manually overridden
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Adaptive Stormwater Management
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Monitoring and Analytics Enhance Existing Infrastructure
Optimize New Infrastructure
Coordinated Watershed Control
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Kaitlin Vacca, PhD, PEDirector of Project Delivery
Opti RTC, Inc.Philadelphia Office
Questions?
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Additional Slides
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Water Resiliency: Adaptivity in a Changing Environment Pond 2
Sept 2018, Adaptive (controlled by the Opti valve), 0.54 in over 23 hrs, pond overflowed spillway
Required Volume for 0.54 inch of runoff over known IA (CF) 22,267
Actual Volume Captured during 0.54 inch event (CF) 35,048
Valve closed during storm