New green infrastructure planning open-source tool available — NOAA

Street-side swale and adjacent pervious concrete sidewalk in Seattle, US. Stormwater is infiltrated through these features into soil, thereby reducing levels of urban runoff to city storm sewers. By U.S. Environmental Protection Agency – U.S. Environmental Protection Agency, Washington, D.C. “Managing Wet Weather with Green Infrastructure:Municipal Handbook:Green Streets” Document No. EPA-833-F-08-009, Public Domain,

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The Mid-Atlantic Regional Integrated Sciences and Assessments (MARISA), a NOAA CAP/RISA team, principal investigators Jordan Fischbach, Debra Knopman, and Klaus Keller published a new tool to mainstream green infrastructure planning in the publication, “Rhodium-SWMM: An open-source tool for green infrastructure placement under deep uncertainty.” Green infrastructure measures are stormwater management practices that mimic natural hydrological processes that are used to mitigate negative impacts of urban development and climate change adaptation. While these practices are increasingly being used, there is a challenge to evaluate their effectiveness due to some deep uncertainties and require navigating tradeoffs between multiple objectives. Advanced decision-making tools and methods such as Robust Decision Making (RDM) and Many-Objective Robust Decision Making (MORDM) have been applied to green infrastructure sparingly, but there has still been a lack of open-source tools to support decision-makers.

The MARISA investigators have developed Rhodium-SWMM that connect two open source tools: the Stormwater Management Model (SWMM) and Rhodium, a Python library for MORDM. This new open-source Python library provides an interface for taking SWMM files and applying them to a wide range of parameters identified as uncertainties or levers. . It helps to efficiently search and sample GI decision alternatives and identify vulnerabilities in the system for better multifunctional solutions to future changes.

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For more information contact Jessica Garrison

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