Overland Flow Paths: Managing Big Rain Without Big Tunnels

An Innovative Cities Lecture

As extreme rain events become more frequent, communities are rethinking how stormwater moves across urban landscapes. This session explores the use of overland flow paths—subtle, landscape-based features within neighborhoods and public rights-of-way that temporarily store, slow, and convey stormwater without relying on expensive tunnels or lift stations.

Drawing on work by MMSD and examples from Milwaukee, New York City, and Copenhagen, speakers will show how connected networks of parks, streets, and open spaces can reduce flood risk, support climate adaptation, and quietly perform during big storms while remaining largely invisible the rest of the time.

Biographies

Karen Sands is the Program Director for CIS, a national leader in the development and implementation of public infrastructure solutions. Recognized as one of the top 10 Influential Women of Water by Mazars in 2020, Karen’s sustainability career has focused on planning for green infrastructure, water resources, energy conservation and renewables, environmental compliance, and climate change adaptation / mitigation. She integrates forward-looking research and contextual opportunities that enhance the quality of life for people living, working, and playing in cities. Karen uses data analysis and policy analysis to advance innovative environmental solutions. She has worked with and for the Milwaukee Metropolitan Sewerage District to advance the practice areas of regional stormwater management.

Livestream Details