The i-DST is a planning-level stormwater decision support tool that helps practitioners select the most appropriate suites of green, grey, and/or hybrid infrastructure. The tool is modular and composed of site-scale and sewer-shed scale hydrologic modeling, life cycle cost and life cycle assessment, and a co-benefit analysis. The sewer-shed hydrologic model uses an updated version of the EPA’s SUSTAIN to optimize the types and numbers of varying stormwater infrastructure in order to determine the best-fit scenarios for decision makers. Updates to SUSTAIN for this tool include a new user friendly GUI (Qt) to read, write, and run SUSTAIN input files, an improved list of evaluation factors to optimize on, greyer underground detention/infiltration infrastructure, and a life cycle cost estimation tool that is integrated with the SUSTAIN optimization engine. The co-benefit analysis is utilized to evaluate the benefits and tradeoffs between greener and greyer stormwater infrastructure. The purpose of this workshop is to beta test the different modules of this tool and receive feedback from participants. The team running the workshop will provide a test case scenario, but participants are encouraged to bring their own data (i.e. modeled or observed flow/water quality times series, stormwater infrastructure design parameters) to be input into the tool.

Integrated Decision Support (I-DST) Beta Testing for Stormwater Practitioners

The International Low Impact Development Conference highlights interdisciplinary practice, research, and implementation of Low Impact Development (LID), Green Infrastructure (GI), Sustainable Urban Drainage Systems (SUDS) and Water Sensitive Urban Designs (WSUD). The focus will be on using our past and present understanding of LID to tune management programs, design practice, and operation and maintenance into the future.