Green Infrastructure Living Laboratory (GSI Performance Monitoring)
Philadelphia's Green City, Clean Waters program has built more than 600 green stormwater sites since 2011, working toward a 2036 target of 9,564 'greened acres' — almost all of it pure construction (rain gardens, tree trenches, stormwater planters) with no sensor layer of its own. The exception is the Green Infrastructure Living Laboratory (GILL), a research partnership the Philadelphia Water Department runs with Drexel University's Sustainable Water Resource Engineering Laboratory: low-cost, low-power wireless sensors on a limited set of sites, including a large rainwater cistern at Drexel's recreation center and campus rain gardens, log soil moisture, water level and climate data in real time and feed back into PWD's own design guidance and policy. In one documented case the monitoring caught a performance flaw at the Drexel cistern before it caused costly damage.
🎓 Lesson
The atlas's no-pure-concrete test cuts both ways here: the vast majority of Philadelphia's stormwater program is genuinely unsensored construction, but a small, real monitoring layer exists alongside it and deserves to be judged on its own modest scale rather than borrowing credibility from the 600+ unmonitored sites, or being dismissed because most of the program is concrete.
📖 Terms in this entry: Non-revenue water (NRW) · Adaptive traffic signals · Digital twin
Sources
This overview was generated with AI from the public sources listed above and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.
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📎 Cite this project
1001 Smart Cities (2026). “Green Infrastructure Living Laboratory (GSI Performance Monitoring)” — Philadelphia, United States. The Smart City Atlas. https://1001smartcities.org/projects/philadelphia-gsi-performance-monitoring/ (last verified 2026-08-02). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.