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Webinar: Integrated Decision Support Tool (i-DST) for Life Cycle Cost Assessment of Gray and Green Stormwater Management Infrastructure

October 25, 2017 @ 2:00 pm - 3:00 pm EDT

EPA’s Office of Research and Development Webcast Series: Integrated Decision Support Tool (i-DST) for Life Cycle Cost Assessment of Gray and Green Stormwater Management Infrastructure

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Planning stormwater infrastructure is difficult because proposed projects often have multiple objectives, including managing hydrology and water quality, providing communities with co-benefits, and minimizing life cycle costs that account for operation and maintenance. Traditional gray infrastructure and more natural green infrastructure are two distinct pathways of meeting these diverse objectives. Gray infrastructure typically involves greater capital investments, while green infrastructure may have more annual costs per volume of water managed. Green infrastructure can also provide societal co-benefits, such as additional urban green spaces, and improved water and air quality and public wellness. This makes deciding between implementation of gray, green, or hybrid (combination of gray and green) approaches challenging.

This presentation will highlight National Priorities grantee work on the development of a planning-level, integrated decision support tool, i-DST, which contains modules that simulate continuous runoff and water quality, using historical climate data and under different climate scenarios. The developed i-DST will also use a multiple-criteria decision analysis to optimize stormwater infrastructure based on user-defined institutional barriers, and economic, environmental, and societal objectives. Central to the estimation of economic costs is the valuation of operation and maintenance costs. We will also overview synthesis of regional green infrastructure cost and performance parameters that allow for application of the tool across the different climatic regions of the United States.

Featured presenters Include:

  • Dr. Terri S. Hogue from the Colorado School of Mines
  • Dr. Jennifer Stokes-Draut from the University of California at Berkeley
  • Dr. Mengistu Geza from the South Dakota School of Mines and Technology
  • Dr. Colin Bell from the Colorado School of Mines

EPA’s Office of Research and Development hosts this webinar series to share current research and results from the Safe and Sustainable Water Resources Research Program. Through innovative science and engineering, EPA’s researchers are developing cost-effective, sustainable solutions to 21st century complex water issues.  EPA’s Office of Research and Development hosts free webinars typically every other month from 2:00-3:00 pm ET. Attendees have the option of receiving a certificate of attendance for each webinar.

Learn more about the presenters and future webcasts.



October 25, 2017
2:00 pm - 3:00 pm